![]() The 2 ends are practically the same, and this wouldn’t have been so if the Turbo 350 transmission had come with central support.įrom 1972, the Turbo 350 transmission received an air baffle and air intakes on the torque converter, which gave room for air cooling. This seems like a disadvantage, but it allowed the automatic transmission to be installed in the Corvair model. The determining characteristic of the Turbo 350 transmission is that it has an almost non-existent central support, especially when compared to the 400. Defining Characteristics of the GM Turbo 350 Transmission The only significant difference is that a variable pitch stator is absent from the torque converter. But in all appearances, it looks like the original 1962 Super Turbine Powerglide manufactured by Chevrolet since they shared several components, which include the torque converter. The torque converter that the Turbo 350 transmission has was eventually carried over to the TH400. The production of the venerable Turbo 350 transmission stopped entirely after 1984. ![]() But it was pulled 4 years later due to its inconsistent acceleration and downshifting. In 1980, a lockup torque converter was finally added to the Turbo 350 transmission. The Turbo 350 transmission was heavily produced for about 15 years but was eventually phased out as the 700R4 became the preferred transmission in 1984. But it works exceptionally well in vehicles with V6 and V8 small block engines. ![]() This transmission could be found in almost all rear-wheel-drive cars and trucks produced by GM until the 700R4 debuted in 1982. The Turbo 350 transmission is one of the strongest – and shortest – automatics installed into a Jeep due to its power. It has a pretty solid balance of size and power and easily fits in smaller automobiles. This automatic transmission became popular almost immediately due to its compactness, strength, and versatility. It was introduced in the model year – i.e., 1969 – as the successor to the Powerglide automatic transmission from GM.īuick and Chevy jointly developed the Turbo 350 transmission, otherwise known as Chevrolet-Buick Combined Transmission or the CBC 350. Its very difficult to install a seal without damaging it without the tool.The GM Turbo 350 transmission is a 3-speed, automatic shift transmission and one of the greatest automatic transmissions ever built. When replacing the shaft seal its best to use the tool because the sharp edge on the shoulder of the shaft at the end of the threads will nick the new seal almost every time. When installing you just need to snug the bolts up. Once I figured this out I started using the black paper gaskets and every steel pan I encountered I would flatten out the pucker around the bolt holes. Over tightening the pan bolts when using a cork gasket puckers the bolt hole until it makes contact with the trans case making it impossible to keep the pan from leaking. The steel pans are also a common leak point because the bolts usually get over tightened trying to stop a leaking pan gasket when its actually the shaft seal. The shift shaft seal is a very common leak point and it does appear to be leaking from the pan gasket when it leaks. I have a lot of experience fixing leaks and fixed a lot of leaky Turbo 350s that nobody else could seem to fix. ![]() I use to work at a transmission shop back in the late 80s.
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