Home Auto 350 Turbo Transmission Troubleshooting

350 Turbo Transmission Troubleshooting


The Turbo-Hydramatic 350, commonly referred to simply as the “Turbo,” was a three-speed automatic transmission first produced by General Motors in 1969. The Turbo 350 was known as a durable transmission and was used extensively by GM. However, over time the Turbo 350 will develop problems, as with any type of transmission, but troubleshooting this transmission is easier than many other types due to its basic design.

No Drive in “D” Position

If the transmission fails to propel the vehicle forward when the transmission selector is in the “D” position, the problem is probably a lack of transmission fluid, a linkage which needs adjustment or low fluid pressure. Check whether the transmission has enough fluid in it first, since this is most common reason and because the fluid level is easy to check. Withdraw the transmission’s dipstick underneath the hood with the engine running, then check the fluid level on the dipstick. If the transmission has enough fluid, check whether the manual linkage on the driver’s side of the transmission requires adjustment. Finally, the transmission may not be able to produce enough pressure to circulate the fluid throughout the engine. A failure to produce sufficient pressure is typically caused by a damaged or missing O-ring seal or a blocked oil strainer.