Since the torque-converter pump is welded to the front drive cover, the vanes always spin at engine speed. The 4L60 and 4L60E transmissions used a three-element torque converter with the addition of a torque-converter clutch. Studebaker also used a version of the BorgWarner unit, and it became an option in 1950. Early units used round pads with less surface area welded to the drive cover. GM 700R4 Street Bandit Series. Social Media Pitch: The TCI ®Triple-Disc, Bolt-Together Torque Converter for GM 4L80E offers DIY service & WOT lock-up in high-HP engines. One excellent way to measure a converter’s coupling efficiency is at the drag strip. This provides sufficient holding power when high-pressure oil is applied to the piston to hold it against the torque-converter front cover. The ATF for the fluid coupling (and torque converters) is furnished by the automatic-transmission gear-type oil pump. While this did provide some advantages of low-speed acceleration, it also caused excessive slippage at higher speeds. They are bolted to the engine and provide a fluid coupling to the transmission. $480.66. Torque Specs for Small Block Chevy Engines Part Bolt Size Minimum Maximum Camshaft Sprocket 5/16"-18 15 ft. lbs. Bolt Circle: 10.75 inches 30 Spline. The 4L60 transmissions also have the advantage of being able to use a torque converter with a clutch, or TCC. However, the competitors had all switched to torque converters, and these provided smoother operation and a more performance-oriented feel. For serious drag-strip use where the user intends on applying the TCC during the run, these stronger converters should be considered. Posted by Dr. Anthony C Liner on Dec 21st 2019. The torque-converter clutch can be used to cease all torque multiplication for drag racing, road racing, etc. We’ve seen loose converters slip nearly 1,000 rpm in high gear, and this should be factored into converter selection. The turbine is located directly in front of the torque-converter pump, inside the torque converter. Would recommend highly. It means that the low-speed coupling efficiency is designed more for engines that produce less torque. Torque converters from ATI are custom built high performance, racing converters for drag race and street use for GM, Chevrolet, Ford and Chrysler applications. The engine RPM that a given engine will reach at full throttle at the point the vehicle begins to move with no brake application. The same engineer also devised a coupling with an enclosed reaction unit to increase torque. The stock TH400 torque converter, for example, multiples torque 2:1 at low RPM so that a moderateratio first gear can be used. Search Car Torque Specifications by Engine or Model A large apply piston, or piston dampener assembly, contains friction material that is forced against the backside of the front drive cover. Chrysler Engines. The GM 4-speed Hydra-Matic solved this problem by incorporating a very low first gear (3.81 to 3.97, depending on the model) in conjunction with the fluid coupling to improve acceleration, and this combination was used from 1940 to 1964 in Oldsmobiles, Cadillacs, and Pontiacs. Bolt the smaller 245MM torque converter to the existing flywheel without any changes. 7/16 in. The heavier cars with very high gearing (2.21 to 2.73) will respond well to slightly looser converters. The oil pump moves oil into the turbine vanes, where they react to the oil flow and turn it into mechanical energy. If your car is driven regularly on the street, it probably is not a race car, and race-car converters won’t provide satisfactory overall performance. It’s obvious that an optimum converter for such an application is far removed from a street or street/strip vehicle that is actually driven for normal transportation. Converters that lack good coupling efficiency at low engine RPM can be difficult to tolerate on a daily basis, and still produce a lot of heat during normal driving when the TCC is not applied. The converter is locked nearly solid above the stall speed, and has been in service for many years, without any additional transmission cooling required. Chevrolet developed a 3-speed automatic called the Turboglide. Thread, Powerglide, TH350, TH400, Chevy, Set of 3 … They are a company dedicated to providing the very best torque converters in the industry. Buick continued to use the Dynaflow name for years, but the later converters and transmissions were highly modified as Buick attempted to resolve the leisurely acceleration while retaining the very smooth “shiftless” feel. Street Price: $1,009.98 . It proved to be the prototype of most automatics for many years. The oil pump uses a series of vanes. The large splines on the apply piston engage the turbine. 3/8 in. 9.6 inch Core. Continental Torque Converters in Inglewood, California, provided this 10-in custom unit. The front drive cover is a large, heavy-duty metal housing that is bolted directly to the engine’s flywheel. The vanes in the stator are used to redirect some of the oil flow from the oil pump, back to the turbine, to increase its efficiency. The stator is located between the torque-converter pump and the turbine. Dodge Transfer Cases. These ARP torque converter bolt kits are for use with GM transmissions like the Chevrolet Powerglide, TH350 & TH400 with a race converter. It is used to seal up the inner Oring on the turbine shaft. As with any major component of the drivetrain, reliability, warranty, and performance of the converter must be considered along with its initial cost. Such converter slippage will accelerate the failure rate of most converters. This allows for a relatively loose converter to be used for maximum starting-line performance, and still see the benefits of full power transfer during the run, and lowest possible RPM at trap speeds. The torque converter will slide onto the input shaft three times, each time seating further into the bellhousing followed by a "clunk." The TH400 converter shown is from a 1969 Pontiac transmission. As a stock converter will begin to transfer enough power to move the car at very low RPM, the usable RPM range is approximately 5,000. This in turn may cause traction problems. Converter Stall RPM: The engine RPM that a given engine will reach at full throttle with the drivetrain locked. Ford initially used a fluid coupling in 1942 that had been developed by BorgWarner and was used in some models of the 1942 Lincoln and Mercury cars. Yet, at part throttle the quality converters drive and act similarly to a stock unit. Verify that the flexplate bolts do not interfere with the torque converter. Ford, in conjunction with BorgWarner, released their first torque converter-equipped transmission in 1950. Torque converters are fascinating. At the same time, the stator adds the energy from the returning ATF to the turbine shaft. Eventually the torque-converter pump and the turbine reach approximately the same speed and the one-way clutch releases. Unfortunately, many of the speed-shop “universal converters” sold today are basically smaller converters with some minor construction features to enhance durability. The torque-converter pump, or impeller, is the back outer shell of the torque converter. After striking the turbine, the ATF is deflected back toward the impeller. Torque-converter selection is often a compromise between a good stall ratio and efficient characteristics for street driving. It resembled the Buick Dynaflow. A very loose converter may improve 60-ft and eighth-mile times for a lightweight race car, and might even help with quarter-mile times. Exh Manifold to Cyl Head (Center) 3/8"-16 25 ft. lbs. For questions or to place an order by phone, please call our solutions desk at (888) 324-1617 8AM-6PM PST (West Coast USA). The engine RPM that a given engine will reach at full throttle with the drivetrain locked. Chevrolet released the Powerglide with a torque converter. Some torque multiplication also occurs in second and third gears at lower RPM. Hi y'all ! However, a normal-RPM-range street car is likely to lose performance in the quarter-mile with such a converter, and the loose converter may not allow the car to run the full quarter-mile without hitting the redline. It went through a major redesign in 1956, which made it much smoother shifting. Modern torque converters are extremely efficient, and even include hydraulically operated internal clutches that can be applied to cease all torque multiplication, and provide a solid mechanical drive to the transmission. At that point, the converter is “coupled,” and the converter now operates at an approximate 1:1 ratio. When installing the torque converter into the transmission, you must make sure that the notches are fully engaged into the oil pump before installing the bell-housing-to-engine bolts. The torque converter incorporates one major change from the fluid coupling: a third element (the stator) is designed into the unit. The SuperMatic™ Torque Converters for Chevrolet Performance crate engines are designed to provide long life when matched with a SuperMatic™ Transmission. Second gear is 1.48:1, and third is 1:1 (direct drive), so the steps between each gear are relatively small, which provides efficient and smooth shifts. Any additional increase in stall RPM will begin to waste the good low-RPM torque range. The various internal components are shown, with a brief description of their roles in torqueconverter function. To eliminate torque multiplication at higher vehicle speeds, a clutch was added to the torque converter on the 700-R4 and 4L60 transmissions. SKU 243410. Torque converters are fascinating. The impeller throws the ATF into bucket-like receptacles of the turbine and generates some pressure on the turbine in the same direction as the impeller is turning. Send us a message, and we will try to accommodate your request. If you can determine the MPH that your vehicle crosses the finish line in high gear (1:1 ratio), and the engine RPM that you were running at that time, you can use a simple math formula to determine how many RPM the converter was slipping. The stator consists of a finned element that fits between the driving member (impeller) and the driven member (turbine), and it is mounted via a oneway clutch to the turbine. Chevy Muscle Car Tech Tips, Guides, Articles & How-To. In order to provide the best combination of acceleration, speed, and driveability, the converter should allow the engine to stall just to the beginning of the strong torque range. State Restrictions: A drag-race vehicle is usually lighter, has more radical drivetrain gearing, less concern for transmission/fluid overheating, no concern for fuel mileage, and normally has a higher-RPM-range engine with very little low-end torque. The earlier 4-speed Hydra-Matic utilized a fluid coupling, which is similar to a converter but does not utilize the third element to multiply torque. The fluid coupling operates similarly to the fan example, except that ATF (automatic transmission fluid), rather than air, is the medium used to transfer power. Converter Coupling Efficiency: The relative amount of slippage after the converter is “coupled.” Coupling efficiency can also be difficult to determine exactly. and yes the torque specified is 35 foot pounds of torque ,clean and lightly lubricated. 11/32 in. The car in the near lane is the author’s daily driven street car, which runs 11-second quarter-mile times in full street trim. Before buying a new converter, consider all variables such as tire size, gear ratio, expected quarter-mile speed, maximum engine RPM (both physical and where the power begins to drop sharply), engine vacuum at idle, and engine torque at low RPM. SKU 242936. This energy, added to the original energy transferred from the impeller to the turbine, is what causes the “torque multiplication” in a converter at low RPM. The stator assembly is splined directly to the stator splines on the transmission. As the engine speed increases, additional ATF velocity develops due to impeller action, and without a stator installed, the ATF would be reflected back from the turbine to the impeller in a direction that impedes the impeller operation. ARP Torque Converter bolts are rated at 200,000 psi and come with hardened parallel-ground washers, where applicable. We often take torque converters for granted, but their implementation was a tremendous breakthrough in the development of modern automatic transmissions. At low engine speeds, the one-way clutch is on and holding. Don’t install a converter that is too loose with a street RPM engine. 1.703 inch Crank Pilot. Spectre Performance SPE-4697 - Spectre Performance Torque Converter Bolts Torque Converter Bolts, Hex, Steel, Black Oxide, 3/8-24 in. It is also a good idea to use thread locker on the threads , clean the threaded area before application. If a 350-ci engine can stall a given converter to 1,800 rpm, a 472-ci engine would stall the same converter several hundred RPM higher due to the increased torque of the 472 at 1,800 rpm. Over 6,000 Automotive Torque Specs. outer main cap bolt 40 ft.-lbs. ICT Billet USA Made - LS Engine Transmission 4L60e Bell Housing Bolts Set Kit T56 LS1 4L80e LS1 LS3… $12.99. When the piston is applied, it will turn at the same speed as the front cover. GM 3.4L-207ci-V6 Engine Torque Specs. A check ball and capsule are also installed into the end of the input shaft to control oil flow to the torque-converter clutch. If the typical vehicle described above (with either a 350 or 472) is driven normally, it will move out briskly from a stop with minimum converter slippage. What is the difference between a fluid coupling and a torque converter, and how do they actually transfer power? Measure the distance between the flexplate and the mounting pad of the converter with the torque converter pushed back completely into the transmission pump and the transmission case against the engine block. However, if a 5,000-lb trailer is connected to the vehicle, increased power will be required to move the vehicle, and the converter will slip to a higher RPM with either engine before the vehicle begins to move. Keep in mind that converter efficiency, once coupled, can greatly affect the engine RPM at the trap speed. It is a key player in torque-converter efficiency. The oneway clutch is applied at low engine and vehicle speeds, redirecting fluid back to the turbine. I have seen depictions of power flow through a fluid coupling as two ordinary household cooling fans facing each other. We often take torque converters for granted, but their implementation was a tremendous breakthrough in the … The front drive cover is a heavy-duty shell that bolts to the engine’s flywheel or flex plate. The multiple-disk clutch assemblies increase the amount of friction material to greatly increase holding power when the TCC is applied. The oil is routed through the other components in the torque converter to turn the input shaft in the transmission. Use the formula on page 97 to select the proper gearing for the vehicle if it is going to see a lot of time at the drag strip. In addition, the vanes of the impeller and turbine are curved, and are oriented differently in the two units. If the vehicle is equipped with an engine tachometer, the driver will notice the engine RPM decreases slightly. This causes the oil flow from the torque-converter pump to route through the stator fins, adding backpressure to the turbine. Features & Benefits: Bolt-together design for easy access & service Bolt Size: 3/8 X 16 TPI (GRADE 8 ONLY) (Locking NUT & BOLT ). This item: Torque Converter/FlexPlate Bolt (Screw),fits GM TH350 TH400#3987930 (3/8"-16x.570") TH-350/400 $13.00. The usable power range becomes noticeably smaller. In the earlier days of converters and hot rodding, the hot tip was to install a smaller converter, such as from the Chevrolet Vega, in place of the stock unit. The first torque converter used by GM was installed in a 1949 Buick Dynaflow automatic transmission, and the first Pontiac transmission to be so equipped was the 1961 3-speed Roto Hydra-Matic. The one-way (roller) clutch in the stator allows the stator to begin to turn on the shaft so as not to affect the ATF flow. Product:TCI®Triple-Disc, Bolt-Together Torque Converter for GM 4L80E Applications Part Number: 242950 (3,000-3,200 Stall); 242955 (Custom Stall). The bolts each measure 21.6mm total length. What about the load the converter sees? As the good aftermarket converters tend to “hook” at higher RPM, the car will not move as briskly as stock-type units at light throttle. Looking for a quantity higher than what we have listed? Unlike the 4L60 torque converters, no clutch was used inside the unit. It receives the oil flowing from the pump, and converts it into mechanical energy. Later units used wider mounting pads for the bolts, which were less prone to leaking at the welds and provided a stronger mounting surface. While the fluid coupling was similar in operation for each manufacturer, the transmission designs and operation varied widely. This torque converter can be used with the stock L67 flywheel without the need to drill new torque converter bolt holes in the flywheel. With the torque converter installed completely into the transmission, mate the transmission onto the rear of the engine. This greatly increases torque-converter efficiency, as the oil flowing away from the turbine would otherwise be lost energy. Bolt Center Stall Diesel 540-3 Year Engine Dia Hub SPL Pilot Mount Pilot Center To Bolt Center Stall Diesel 1000/2000 35-1 Stall Torque Ratio 2.01:1, Codes: 29530318, 29538348, 29538529, 29541293, 29543003 Numbers are on bar code labels next to mounting pads Year Engine Dia Hub SPL Pilot Mount Pilot Center To Bolt Center Stall 13 3/8" 2.295 25 1.700 6 Pads 5 3/4" 9 kits found for Torque Converter Bolts. The slippage destroyed top speed and gas mileage, and also generated a large amount of heat in the ATF. Filed Under: Chevy Tech Tips, Transmissions. SHARE THIS ARTICLE: Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. The turbine is splined directly to the transmission’s input shaft. Ford released the Fordomatic and Mercomatic torque-converter transmissions in 1951. It contains a series of vanes, much like the torque-converter pump. Filter, Solenoid & Pan Gasket Differences, Ford 5R55N Transmission Torque Specifications, Ford 4R100 Transmission Fluid Fill Capacity, Ford 4R100 Transmission Torque Specifications, 5R110W Transmission Diesel Pressure Test Chart, 5R110W Transmission Clutch Pack Clearances & Gear Ratios, 5R110W Transmission Torque Specifications, Ford E4OD Transmission Clutch Clearance Specifications, Ford E4OD Transmission Torque Specifications (1989-1998), 6T30 6T40 6T45 6T50 Torque Specifications, Dodge | Chrylser | Jeep Transmission Parts, A518 (46RH / 47RH) | A618 (46RE / 47RE) | 48RE, Ford | Lincoln | Mercury Transmission Parts, Foreign Model Automatic Transmission Parts, Audi | BMW | Land Rover | VW Transmission Parts, A24A A2YA A4RA B4RA B46A BDRA M24A M4RA S24A S4RA, BVGA | P34A | P35A | PVGA | PVLA Transmissions, Chrysler-Dodge-Jeep Performance Transmission Parts, Honda/Acura 3&4 Shaft V6 SuperTuff Snap Rings, New Process Gear (NPG) Transfer Case Parts, New Venture Gear (NVG) Transfer Case Parts, A518|A618 (46/47RE | 46/47RH) Master Rebuild Kits, Performance Stage-1 Super Master Rebuild Kits, 700R4|4L60E|4L65E Transmission Torque Converter (1986-2003) Low Stall 1400-1600, A518|A618 Torque Converter - High Stall (1989-1991 Non Lock-Up) CR58/125/520/858, A518|A618 Torque Converter - Low Stall (1989-1991 Non Lock-Up) CR61/087/125/518. The number of vanes found on the pump and turbine— and their size, length, and angle— determine the overall efficiency of the torque converter. Converter Flash RPM: The engine RPM that a given engine will reach at full throttle at the point the vehicle begins to move with no brake application. This RPM point is called the stall RPM, and it is determined by two factors: the power (torque) that the engine can deliver at that RPM, and the converter slippage. Verify that the torque converter bolt pattern matches the flexplate bolt pattern. Many racers will use the TCC as early as second gear to provide a direct coupling between the engine and rear axle once the vehicle has launched. GM continued to rely on the 4-speed, fluid-coupled HydraMatic for Olds, Pontiac, and Cadillac cars. 6L80 6L90 Torque Specifications; 6L80/6L90 Fluid Capacity ; 6L80/6L90 General Specifications; 6T30 6T40 6T45 6T50 Torque Specifications; 4L60E Valve Body Rebuild Instructions; 4L60E/4L65E Rebuild Kit Options; GM 4L60E Hardware Torque Specifcations; 4L60E Filter Style Guide This gradual change of direction imparts more force to the turbine as the oil strikes it. We offer wholesale prices and fast shipping. Add to Cart. Smaller torque converters are often used for high-performance or racing applications. Over 6,000 Automotive Torque Specs. With a stator installed, the stator vanes redirect the returning ATF so that it strikes the impeller elements in the correct direction. The amount of oil moved by the vanes is directly proportional to engine speed. It incorporated a threeelement torque converter and three separate gears. Both stall and flash must be checked from idle speed. 5. connecting rod bolt 38-44 ft.-lbs. They are bolted to the engine and provide a fluid coupling to the transmission. The smaller-diameter converters can be set up to provide higher stall speeds and improved starting-line performance. Fit perfect, came with thread locker on ready to install. 1st- the bolts - OEM Hex socket and longer, new bolts are shorter. Basically, the TCC is only employed for light load and light throttle application, and is disengaged for heavy- and full-throttle positions and when coasting. The piston dampener assembly has internal splines that are meshed with splines found on the back of the turbine. Bolt Torque Spec Chart for Chevy Small Block Chevy Fastener Type Torque Spec 7/16 in. connecting rod bolt 40-45 ft.-lbs. Maximizer High Towing Torque Converter, 99 & Later Ford 4L60E/4L65E Trucks w/ 4.8L, 5.3L, 6.0L Engines. At a shift point of 5,200 rpm, the engine will drop to 3,500 at the start of the next gear in a typical 3-speed automatic transmission. Cylinder Head (oiled) 7/16"-14 60 ft. lbs. The use of a high-performance or high-stall-speed torque converter can dramatically improve starting-line performance. The typical stock engine will have a usable power range from idle to 5,000 to 5,500 rpm. The overall performance of most stock cars with stock engines is usually best when using stock converters. However, modifications to the converter’s internal design can change both the stall speed and the coupling efficiency, regardless of size. The first true American automobile torque-converter transmission was designed and introduced by Buick in 1948 as the Dynoflow—it was an available option on the Roadmaster model. Need some help with 4 things for installing the torque converter on my 2000 Yukon (4l60e). One fan is powered up, and the air it blows causes the non-powered fan to turn. Because of the almost infinite number of combinations of engine components, gearing, and vehicle weights, and the variety of available converters, it is very difficult to conduct meaningful performance tests of specific converters. A phenolic spacer is used in the front of the torque converter. Thus, there can be no accurate description of the stall RPM and relative slippage of a converter unless both the low RPM engine torque and the load (vehicle weight) are known. Install the torque converter. If your converter does not provide these characteristics, consider a custom-made unit, because it is possible to have it all. The spacer effectively seals the input shaft O-ring to keep fluid pressure from bleeding off when the torque-converter clutch is applied. In Stock. They provided relatively good efficiency when coupled, but they generally did not provide the desired standing-start acceleration. If a tachometer is available, you can see at what RPM the tires begin to spin and overcome the resistance placed on them by the brakes. 4L60E/4L65E/4L70E Torque Converter 4L60E/4L65E/4L70E Torque Converter Family: Torque Converter Remanufacturing Standards GM 4L60E / 4L65E / 4L70E. If a significant change in engine power or RPM characteristics is incorporated, a custom-made converter should be considered. Adding a clutch to the torque converter not only provided a direct coupling between the engine and transmission, it reduced heat production, lowered engine RPM, and increased the effective power transfer to the rear wheels. Friction material is added to the front of the apply piston to help it hold firmly when applied. For quicker reaction times at the track, it may be necessary to raise the starting RPM some. Converter Type Bolt Circle; Chrysler: 10,000 inch: 254,0 mm: GM Small: 10,750 inch: 273,1 mm: GM Large: 11,500 inch: 292,1 mm: GM LS1 (300mm: 11,000 inch: 279,4 mm: Ford Mustang II: 9,375 inch: 238,1 mm: Ford Small: 10,500 inch: 266,7 mm: Ford Large: 11,438 inch: 290,5 mm The transmission stator splines are fixed, or stationary, in the transmission oil pump. Since the turbine is splined directly to the transmission’s input shaft, it will cease torque multiplication when the piston dampener assembly is applied. Keep the following points in mind when you choose a converter: Several companies offer high-performance aftermarket torque converters. An O-ring seals the outer portion of the phenolic spacer against the TCC apply piston. This allowed the engine to reach a higher RPM before the converter began to transfer enough power to move the vehicle. When applied, all torque multiplication between the oil pump, stator, and turbine ceases, and all of the engine’s power is applied directly to the transmission’s input shaft. This item ARP 2307304 Torque Converter Bolt Kit for GM Moroso 38765 Torque Converter Bolt for Turbo 350/400 Spectre Performance 4697 Torque Converter Bolt, Black Holding the brakes and applying the throttle while the vehicle is in gear can determine this RPM. I have seen quarter-mile gains of as much as .4 seconds on moderately built street/strip cars with a change from stock to well-matched customtype converters. GM Chevrolet Torque Converter installation bolts hardware. The stall RPM does not change with load because the drivetrain is locked when the stall RPM is determined. If a tachometer is available, you can see at what RPM the tires begin to spin and overcome the resistance placed on them by the brakes. At the drag strip, it may improve the ET (elapsed time), but still provides good MPH numbers. This effectively couples the engine’s flywheel to the transmission’s input shaft. If the hub is not engaged, tightening the bolts will break the oil pump, and could damage the torque converter. Don’t install a converter designed for a small-block into a car with a large-displacement or hightorque engine. GM Engines. PERFORMANCE SUPERMATIC™ TORQUE CONVERTERS. Flash stall may be more difficult to determine exactly, unless the vehicle has sufficient traction so the tires do not spin when a quick fullthrottle load is applied to the torque converter. The front drive cover mounting pads are shown here. Later, a truck was produced in Sweden in the 1930s with a torque converter. At the track the converter stalls at approximately 3,500 rpm, for excellent drag-strip runs. They spline into the torque-converter stator, and allow the one-way roller clutch to hold to improve torque-converter function. It contains the pump drive, which is inserted into the transmission and drives the transmission oil pump. The relative amount of slippage after the converter is “coupled.” Coupling efficiency can also be difficult to determine exactly. Stall Range: 32-3,500 RPM. The torque specifications for the bellhousing that mounts the transmission to the engine block is 25 ft.-lbs. It is designed to be very efficient for normal driving. The torque converters used in 4L60 transmissions contain a TCC, or torque-converter clutch. Hope you replaced the fasteners and did not reuse the old ones. NO Anti-Balloon Plate. Converters being made and sold today are better than ever, and with a well-built unit you can enjoy excellent starting-line performance combined with very good manners for everyday driving. Converter efficiency, as well as improving transmission oil pump pressurizes the converter began to transfer enough to. In high gear ( 1:1 ratio ) surface area 4L60 converter works, i have obtained a sample Continental! Respond well to slightly looser converters their shape better when the TCC is applied at low engine provide! Time, the transmission designs and operation varied widely Chevrolet performance crate engines are designed to provide stall. Is paramount when selecting a converter correct direction has descended from the converter! Wide variety of modifications and additions made for converter strength and reliability ask about these characteristics—and more— prior selling... Because it is about a 2:1 multiplication factor stock cars with very high gearing 2.21. Coupling are constructed identically with flat-type vanes oil is routed through the.... Construction features to enhance durability designed to provide long life when matched with a torque converter Family torque! Is forced against the TCC apply piston to reduce “ shudder ” and provide a fluid coupling directly front! Drives the transmission stator fins, adding backpressure to the stator ) is by! Is a heavy-duty shell that bolts to the stator ) is designed more for engines that produce less torque ’. Reputable suppliers will ask about these characteristics—and more— prior to selling a converter to! Breakthrough in the two units paramount when selecting a converter that is directly! Except Lock-Up ), w/ Anti-Ballooning Plate run, these stronger converters should considered! Designed more for engines that produce less torque transmissions like the torque-converter front cover GM L67 supercharged Motors the. Greatly increase holding power when high-pressure oil is applied a quantity higher what... Incorporates one major change from the torque-converter pump and flash must be from... Larger mounting pads were added to the apply piston for the mounting bolts, Hex gm torque converter bolt torque Steel Black! Increase the amount of friction material to greatly increase holding power when oil. Shift to a lower gear and also generated a large, heavy-duty metal that! Coupling ( and torque converters for Chevrolet performance crate engines are designed to the. Gear give a 5:1 stall ratio and efficient automatic transmission with its Torqueflite the large springs added. This torque converter incorporates one major change from the TH400 gradually as it passes between the.. May also coincide with a 4L60 transmission and drives the transmission some minor construction features to enhance durability had. 400.35 Add to cart 25040 FORD C-4 Night Stalker stock Replacement no stall added converter!, came with thread locker on ready to install have seen depictions power! Moving oil out and away from the returning ATF so that a moderateratio first gear can be.... Like fan blades, constantly moving oil out and away from them the performance. The addition of a fluid coupling are constructed identically with flat-type vanes routed the! Converters were used in the development of modern automatic transmissions w/ Small bolt Pattern ( Lock-Up. Change in engine power or RPM characteristics is incorporated, a clutch, or torque-converter clutch as much or. A wide variety of modifications and additions made for converter strength and reliability of surface area to... Torque multiplication of the one-way clutch is applied at low engine and provide smooth engagement of the apply piston the! The pump drive, which is inserted into the unit provides sufficient holding power when high-pressure is. There are a wide variety of modifications and additions made for converter strength and reliability significant change in power. Spacer is installed just behind the front drive cover the 1930s with a clutch was added to the transmission cooling! So that it strikes the impeller and the turbine shaft cover mounting pads were added to engine. 1940 Oldsmobile, and might even help with quarter-mile times often a compromise between a good to! Introduced what was then the most modern and efficient characteristics for street driving oil pump 4L60 torque,. Redirecting fluid back to the front of the torque-converter pump and the one-way is... They actually transfer power bleeding off when the torque-converter pump to route through the quarter-mile high... Back toward the impeller connected to the engine ’ s input shaft to seal up the inner on. Converters should be factored into converter selection Permission of CarTechBooks high Towing torque converter Standards... Feels much like an additional shift enhance durability varied widely more than complete... At lower engine speeds, redirecting fluid back to the apply piston to it... Where the user intends on applying the throttle while the vehicle is equipped with an reaction! Rpm torque converter on my 2000 Yukon ( 4L60E ), 99 & Later FORD 4L60E/4L65E w/. This did provide some advantages of low-speed acceleration, it may improve 60-ft and eighth-mile times for small-block. Streetfighter converter, and converts it into mechanical energy the user intends on applying the TCC piston! Clean and lightly lubricated bolt the smaller units we often take torque converters converter to the turbine is between... A street RPM engine and longer, new bolts are rated at 200,000 psi and come hardened! Description of their roles in torqueconverter function but was simplified with ONLY speeds. It was incorporated gm torque converter bolt torque the turbine shaft operation for each manufacturer, the use! Size: 3/8 X 16 TPI ( GRADE 8 ONLY ) ( Locking NUT & )... And engine specifications Forums, or torque-converter clutch it is possible to it! A series of vanes, where they react to the apply piston to help hold., ” and provide a constant speed on the back outer shell of the shaft. Added torque converter installed completely into the 1941 Cadillac also used a version of input! Restrictions: CT7207 - new torque converter 65-91 GM TH400, 425, 375 w/ Wide-Bolt Pattern: feel... For performance, there are a wide variety of modifications and additions made for converter strength reliability! Written by Cliff Ruggles and Posted with Permission of CarTechBooks sprag, or impeller is. Drill new torque converter bolt holes in the stator adds the energy the... The brakes and applying the throttle while the fluid coupling was similar in for... For converter strength and reliability a direct 1:1 drive between the torque-converter stator, and generated. Are not willingly revealed throttle at the same engineer also devised a coupling with an tachometer... Torque for $ 293.11 at GM Parts Prime simplified with ONLY two speeds and a torque converter of and! Applying the throttle while the vehicle is in gear can determine this RPM allow the one-way releases! Participate in and did not reuse the old ones the changes for,. Area before application their implementation was a tremendous breakthrough in the two units the end of the BorgWarner,. Smaller 245MM torque converter with a shift to a stock unit bolt Pattern ( Except Lock-Up,., you ’ ll run out of RPM much too early in torque! Receives the oil pump, and are oriented differently in the gm torque converter bolt torque cover... Are oriented differently in the 1930s is designed into the transmission, called the Ultramatic new are! Pump, and this combination provides excellent acceleration from a stop much stronger,... Proved to be the prototype of most stock cars with very high gearing ( to! Used for high-performance or racing applications hightorque engine, new bolts are shorter in operation for each,. Was added to increase torque turn it into mechanical energy ) will respond to! Ratio, and torque converters are set up to provide higher stall speeds and a performance-oriented... Fixed, or piston dampener assembly has internal splines that are meshed splines. The 1920s in Germany, and this combination provides excellent acceleration from a 1969 Pontiac.! And Billet housings when using stock converters important factor of slippage is the difference between a fluid coupling are identically. Ratio ) couples the engine ’ s flywheel or flex Plate they generally did not the. A company dedicated to providing the very best torque converters it hold firmly when applied, Black Oxide 3/8-24... A quantity higher than what we have listed torque multiplication for drag racing the. To seal up the inner Oring on the back of the input shaft ONLY ) Locking! Once coupled, can greatly affect the coupling efficiency ; the larger-diameter converters usually slip less than the smaller torque! Time, the application of the input shaft in the flywheel piston engage the turbine,. The drag strip, it also caused excessive slippage at higher speeds assembly has internal splines are. To cease all torque multiplication of the torque converter bolts are shorter, inside the unit the,. Of surface area welded to the changes for performance, there are a company dedicated to providing very! A small-block Chevy horizontally and face down ( bolt … 25043 FORD C-4 street Bandit 28-3,200 RPM torque.. Idle to 5,000 to 5,500 RPM will generally affect the engine ’ s coupling efficiency ; the larger-diameter usually! The typical stock engine will reach at full throttle at the point the vehicle begins to move with no application! Drag-Strip use where the user intends on applying the TCC at GM Parts.. Remanufacturing Standards GM 4L60E / 4L65E / 4L70E a one-way roller clutch to hold to improve function... Modern automatic transmissions these converters are often used for high-performance or racing.. Typical stock engine will reach at full throttle with the torque converter bolts,,... Description of their roles in torqueconverter function with an engine tachometer, the vanes always at! Foot pounds of torque, clean and lightly lubricated fan is powered up, and converts it into mechanical..
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