What does the vacuum modulator do on a Turbo 400?
The vacuum modulator is a vital component of automatic transmissions. It tells the transmission what kind of load is being put on it, allowing the transmission to react with the proper line pressures and shift points. Simply adjust the screw inside the vacuum nipple for more or less diaphragm pre-load.
When did they stop making TH400?
| Turbo-Hydramatic | |
|---|---|
| Overview | |
| Manufacturer | General Motors |
| Production | 1964–2012 |
| Body and chassis |
How much vacuum does a Turbo 400 need?
Registered. Coan told me 13-14 at idle inches of vacuum is needed for a modulator to work properly.
Is a TH400 a 4 speed?
The TH400 is a 4 speed, unfortunately one of them is reverse:1poke: There is no way anyone will ever build a 4 speed th400, it would be like building a 8 cylinder 2 jz there is no room in there.
When did the GM TH400 automatic transmission come out?
An innovative variable pitch stator was available in the 1965-1967 cars that could essentially vary the characteristics of the torque converter. The TH400 made its way into heavier duty GM trucks in the 1970’s in 2wd and 4wd configurations. The 400 was not just a GM exclusive transmission.
What kind of transmission does a Cadillac TH400 have?
TH400 Transmission Specs, ID, and Common Problems. The TH400 is an aluminum cased three speed automatic transmission that was produced by GM. It was introduced for the 1965 model year and made its debut in Cadillacs, and is respected for its durability and adaptability. The TH400 came in two wheel drive and four wheel drive vehicles,…
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.
What causes the TH400 to shift too early?
Common TH400 Problems Early Shift– One of the most common issues with the TH400 is that it’ll shift too early. This is almost always cause by the vacuum line that runs to the modulator from the intake manifold. Late shift– The Th400 will often shift a little later than a person would like, espescially at the track.