Also, at about the same time, I purchased a collection of 1956-'62 parts that filled the inside of a 15-foot travel trailer. A 4L80-E can handle more torque than a 4L60-E. Photo Courtesy Rocky Rotella Step-11: Install Front Reverse Idler Gear With the unit loosely assembled, install the front reverse idler gear its tanged thrust washer into the main case and insert the rear reverse idler gear through the rear-bearing support. Initially, these stampings were located on the right front corner of the transmission, covered by the converter cover. The clutch assembly was housed in an aluminum bellhousing, which also mounted the transmission.
The speed gears are inde¬pendent of the mainshaft. Listings of the transmission application codes can be seen. Photo Courtesy Rocky Rotella Step-9: Inspect Mainshaft Gears The mainshaft and gear cluster are seen here. This lineup remained unchanged in 1972. Only the 455 engines received the larger clutch.
The input shaft goes to the cluster gear. This switch may be left in place, unused- or remove it and plug the port. Cone clutches have a high surface area-to-space relationship, and have been used in other automatic transmissions and even early 20th. It is a relatively rugged, compact transmission that lends itself to a wide variety of applications and modifications. This disabled the distributor vacuum advance in all gears except high gear, and is a single wire switch threaded into a pressure port near where the cooler lines are located. This makes it fairly easy to identify.
These can be identified outside the vehicle with the torque converter removed by a narrow front pump spline. However, if there is interest in prior years it can certainly be included. Once the pin has been driven out, lift off the cover. The sole automatic transmission choice was an upgraded version of the 2-speed Super Turbine 300 that was available in the Tempest and LeMans series. If you strike out finding one of those fairly rare units, most automatic transmission builders can build you one that is beefed up to handle just about any power level. The shift patterns are shown, as they would appear on the floor console transmission indicator plate.
Photo Courtesy Rocky Rotella Step-4: Remove Reverse Gear Lock Pin Look down inside the case at the mainshaft gear and the counter gear. The marking if any are found cast into the bellhousing on the passenger side. This allows removal of the countershaft gear, its 112 roller bearings, and its thrust washers, as well as the front reverse idler gear and its thrust washers. Many failed in the line of duty and were replaced under warranty or were swapped out later. Whether on the street or track, drivers could run larger and stickier tires and put the transmission under more stress, and it kept coming back for more. Previous Corvettes had always had an excellent power-to-weight ratio that made an oil cooler unnecessary.
So K306 would be Nov. Four wheel drive truck applications used 3 various shorter output shafts that coupled with a female transfer case input shaft. For more historical information, see at Wikipedia. Also install the rear extension gasket at this time. The variable-pitch stator was eliminated after 1967. So, although it carries the Turbo Hydra-matic name, the Hydra-matic Division of General Motors had little, if anything, to do with its design.
From 1964-1967, Buick and Oldsmobile versions of this transmission used a torque converter with a variable-pitch called Switch-Pitch by Buick and Variable Vane by Olds. For all intents and purposes the Turboglide is a 3 speed automatic with no apparent shift points. Several businesses offer high-quality rebuild kits for the Muncie 4-speed transmissions, including 5speeds. Conversely, the use of an overdrive allows you to retain a modicum of driveability when using aggressive gears. Once that is completed, install the retaining springs. Using a hydraulic press, gently press the countershaft pin into the case from the rear. As men¬tioned earlier, if this procedure seems too dificult, it is acceptable to have this portion of your restoration farmed out.
It may also require some transmission tunnel mods to fit, as it is physically a very large transmission. In 1992 electronic controls were added, and it became the. . The stator blades moved from high to low position by an electrical and a stator , controlled by a switch on the linkage. Check the countershaft gear endplay with a dial indicator if old thrust washers are reused. It conceivably could have been drilled for the Chevrolet but there was never a reason to do that as the Powerglide was a strong transmission. Photo Courtesy Rocky Rotella Step-12: Orient Front Reverse Idler Gear This photo was taken prior to the installation of the front reverse idler gear on the mainshaft assembly.
Next, install the rear extension oil seal. Apply torque evenly to the case during tightening. The typical width of this transmission where it bolts to the engine is 20 in 51 cm overall. The close ratio M-22 was dropped, leaving the wide-ratio M-20 as the only 4-speed transmission. Again, if you are inexperienced in the area of transmission rebuilding, have a reputable builder prepare your transmission. The difference is in the speedometer drive gear adapter fitting that attaches to the extension housing. Other units to include the 2 prong connectors had an internal pressure switch that was used to control spark timing retard.
How to Work with and Modify the Turbo Hydra-matic 400 Transmission, , p. The procedure is the same as the one illustrated here from the service manual. Photo Courtesy Rocky Rotella Step-8: Insert Pin in Main Case The pin should be flush with the front of the case, and its stepped portion should face downward to clear the rear bearing support. Likewise, the Buick Dynaflow and Hydra-Matics were developed to bolt up to the existing Buick, Oldsmobile, and Pontiac engines of the day, which used manual trans¬missions and shared common bellhousing patterns. In 1962, for example, there were roughly only 1,500 Powerglide Corvettes produced. Uses a 17 spline input shaft.