When did the General Motors TH400 transmission come out?
When did the General Motors TH400 transmission come out?
The transmission was not exclusive to General Motors, as many luxury brands such as Jaguar, Ferrari, Rolls-Royce and many others made use of this transmission. The TH400 was first introduced beginning in 1964, as it began to replace the Super Turbine 300 transmission, which was a 2 speed automatic.
Why does TH400 shift to 3rd by 20mph?
Maybe it does not build adequate vacuum or creates excessive slippage. You can try to adjust the modulator, but it will not give much adjustment of shift point.
What kind of transmission does a Buick TH400 have?
The TH400 was initially placed in Buick and Cadillac cars and later added to Chevrolet, Oldsmobile and Pontiac cars. This transmission eventually made its way into many of the truck applications for General Motors.
What’s the peak torque of the TH400 transmission?
Although the overall sentiment is that this is a very strong and durable transmission, some of the most common problems seen are clutch wear and hydraulic fluid leaks. The Turbo 400 is rated conservatively at peak torque of 450 lb-ft.
Maybe it does not build adequate vacuum or creates excessive slippage. You can try to adjust the modulator, but it will not give much adjustment of shift point.
How long does 2nd gear last on TH400?
When trying to not burn out and accelerating, it goes clear through 1st, then hits 2nd. The 2nd gear lasts for like 1-2 second then shifts directly to 3rd.
How to adjust shift points on GM TH350?
A minimum of 12″ Hg engine vacuum is required for proper operation. You can adjust the modulator with a small screwdriver. Turn the adjustment screw clockwise to raise shift points and counter-clockwise to lower shift points. B&M Vacuum Modulator for GM TH350/TH400 Automatic Transmissions ~ Part # 20234 on Amazon
Are there any problems with the JEGS TH400?
Discussion in ‘ Troubleshooting & Diagnosis ‘ started by Suicyko, Apr 4, 2006 . I’m having problems with a JEGS TH-400. Any help other than get a manual transmission would be great.
