What causes a 350 Turbo transmission to shift?

Also check the planetary pinions, the sun gear, and both the front and rear internal gears for tooth damage. Finally, check the condition of the engine’s two motor mounts. If one or both of the motor mounts are damaged, the engine will cause the transmission to shift, which will in turn cause the transmission to produce noise.

Can a GM Turbo 350 transmission be rebuilt?

If your Turbo 350 came from behind a lighter duty motor, don’t worry. These transmission can be affordably rebuilt with stronger components in nearly every area. Additionally, shift improver kits are available to provide firmer, quicker shifts, reducing slippage, heat and clutch wear.

What kind of transmission does a Chevy 350 have?

Jointly developed by Chevy and Buick, it is also referred to as the CBC (Chevrolet-Buick Combined) 350. The Turbo 350 quickly become known for its strength, versatility and compactness.

What kind of transmission does a GM TH350 have?

GM TH350 Automatic Transmission The TH350 is an automatic shift, three-speed transmission. The TH350 transmission was introduced in the 1969 model year as the successor to the GM Powerglide automatic transmission. The HydraMatic 350 transmission was prevalent in nearly all GM, rear-wheel-drive cars and trucks through 1984.

What kind of transmission does a Chevy Blazer have?

You usually do find the 700r4 transmission in GM cars like Chevy Blazer, Suburban, Camaro, Corvette, Impala and even in Oldsmobile Cars with a lot more. To mention all cars this transmission was fitted in; the list would be very long.

Is the GM Turbo 350 a good transmission?

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.

What to do when automatic transmission won’t shift into 3rd gear?

Check the Throttle Cables. Changing the fluid solves plenty of transmission issues but if the problem of automatic transmission won’t shift into 3rd gear persists, the parts you should check are the throttle cables. A defective cable with excessive slack is likely to create issues with smooth shifting of the gears.

Why is the transmission not working on my Ford F-350?

The transmission will not shift into overdrive and became stuck between third and fourth gear when going between 60-65 mph. While driving the rpm’s also revved and the vehicle started not to shift into second gear. The dealer replaced the sensor. The problem just started last weekend.

What kind of transmission does a GM 350 have?

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.

What causes a Turbo 350 trans to not shift out of first gear?

Turbo 350 trans won’t upshift from first gear. Discussion in ‘ The Hokey Ass Message Board ‘ started by todd_a, Apr 28, 2010 . What would cause a turbo 350 to not shift out of 1st gear? It has plenty of fluid. It has vacuum to the hose to the vacuum modulator. That vacuum hose is brand new so not cracked or anything. It does reverse and 1st fine.

Why is my transmission not working on my 350?

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.

What happens when you shift gears in an automatic transmission?

Your automatic transmission normally operates smoothly when shifting from gear to gear. You shouldn’t feel any grinding, slipping or shaking sensations as your car switches gears. When a transmission is starting to have problems, these symptoms can seem insignificant.

When did the Turbo 350 transmission come out?

The Turbo 350 transmission was introduced beginning in 1969. This transmission was a 3 speed automatic transmission developed jointly by Chevrolet and Buick.

Turbo 350 Transmission Specs. This transmission replaced the GM Powerglide automatic transmission, which was a 2 speed automatic transmission that was in production for 23 years. The Turbo 350, known by the name TH350, was used in nearly all GM rear wheel drive car and truck applications during its tenure.

Can a Turbo 350 tailshaft use a speedometer sleeve?

Turbo 350 tailshaft housings can utilize one of two speedometer sleeves: early Chevys (left) have a small ⅞-inch-od driven-gear hole and use the same sleeve as many GM manual transmissions. BOP housings (right) take larger gears and 2-inch sleeves. Extension housings with their corresponding drive and driven gears can be swapped.

What to do if Turbo 350 wont shift into 3rd gear?

It is a solid version (available at transmission parts shops) of this clip and is the hot ticket to making TH350’s keep from messing up the cases with clutch wear. At minimum install a shift kit (Tran-go) as they will actually increase the life of the unit as it minimizes the shift timing between gears thus reducing wear.

The Turbo 350 transmission was introduced beginning in 1969. This transmission was a 3 speed automatic transmission developed jointly by Chevrolet and Buick.

How much torque can a Turbo 350 transmission handle?

The maximum torque that this transmission could handle varied depending on the application to which it was being applied. The transmission would be modified so that the transmissions behind the stronger engines were able to handle the additional torque. The most torque from an engine that this transmission was applied to was 410 lb-ft.

Why is my TH350 not shifting into 2nd gear?

Accelerating up through 35 MPH and past 45 MPH still does not produce that 2nd shift. My RPM reading is about 2200 or slightly above when going at least 45 MPH. What are some of the things that I can look at before taking it to the transmission shop?

Why is my Turbo 350 transmission leaking fluid?

The converter is draining down while sitting. This allows the fluid level to go above the selector shaft seal and the speedometer input seal. Replace these before the front pump seal and your problem will probably be reduced or eliminated.

How can I tell if my TH350 is shifting into 3rd gear?

I have used B&M shift kits in two TH350’s that I’ve had, and the 2-3 shift feel, remained pretty much stock. You can tell if It’s shifting by watching the tach. Manualy shift into 2nd, and bring the car up to 40 MPH, then put the shifter into 3rd. There should be a very noticable drop in RPM when it shifts!

What was the problem with my Turbo 350?

Had the same problem with my 350. Turned out to be the speedometer seal. Four dollars later, the leak stopped. (You must log in or sign up to reply here.)

How do you drain transmission fluid from a TH350?

Then, the body is held, and the screw of T-1001 is tightened against the selector shaft to draw the seal from its bore. Provides the easy removal and installation of the selector shaft (shift lever) seal. Installs the selector shaft seal with the shaft either in place or removed. Draining of the transmission fluid is not required.

What happens when you let off the gas on a 350 Trans?

When you drive it, it goes through 1st, then it doesn’t shift. If you let off the gas at that point, it the rpm’s will drop but the car is just coasting. You can give it gas and it will rev back to where it starts pulling in 1st again, but never upshifts.

Are there any transmission problems with the TH350?

Re: TH350 Transmission problems with shifting by lagunainnewark Tue Aug 16, 2011 8:15 pm Passenger front corner could also be cooler lines or dip stick tube seal, Good luck, Ron lagunainnewark G3GM Member Street Cred: 8 LikeDislike

Why does my Turbo 350 Trans not shift?

It has plenty of fluid. It has vacuum to the hose to the vacuum modulator. That vacuum hose is brand new so not cracked or anything. It does reverse and 1st fine. When you drive it, it goes through 1st, then it doesn’t shift. If you let off the gas at that point, it the rpm’s will drop but the car is just coasting.

What causes a noisy transmission in a GM Turbo 350?

Noisy Transmission Noise from pump caused by high or low oil level Cavitation from plugged oil filter Water in oil Damaged oil pump gears and housing Worn or damaged planetary gears Burnt or worn clutch plates, or burnt lining on band

What causes automatic transmission to not shift properly?

A faulty PCM (powertrain control module) will affect the transmission performance because it controls the gearbox mechanism in most car models. The PCM will have no input if the speed sensor fails. In that case, the transmission will not shift properly. To solve this problem, you have to check the speedometer to see…

When to remove the valve body on a GM Turbo 350?

The most difficult problems when it comes to transmission function involve the valve body (control valve assembly). In almost all cases the valve body must be removed to correct any issues, and this should be done after all other possibilities have been eliminated.

What causes a leak in a Camaro Turbo 350?

The symptoms are: daily driven they are fine, after they sit for a couple of weeks they leak a lot. All the seals such as the tail shaft,Dipstick,speed o cable and kick down/Throttle Valve are NOT DESIGNED for exceptionally high fluid levels that is caused by the aforementioned condition. I am with Everett, and say the pump seal is shot.