It was also durable, and these characteristics can be tied to the following: The features of the TH400 Transmission enabled it to provide improved performance over previous transmissions. Generally, here’s a list of cars that used the TH400 transmission: This is an electronically controlled transmission that is still being produced and used in a range of heavy-duty GM and military cars/trucks. Around the same time when the TH400’s name was changed, an overdrive version called the 4L80-E was launched. The change in naming does not come as surprise since some GM transmissions were also renamed (for example the 700R4 to 4L60). GVW or Gross Vehicle Weight) in 1990 to make it easier for buyers to identify the transmission. The naming of the TH400 was changed to 3L80 (3-speeds, Longitudinally positioned, 8000 lbs. In the 1970s, the TH400 was used in heavier-duty GM trucks and it was available in 2wd and 4wd configurations. This stator helped to vary the torque converter’s characteristics, and you can tell a car has this stator by the two-prong plug on the case. Buick, Olds, and Cadillacs that were later launched between 1965-1967 also featured the transmission but with an innovative variable-pitch stator. ![]() Upon its launch, the TH400 was evident in Buicks and Cadillacs, and a year later, it was used in Chevrolet and Oldsmobile cars. It was used in a wide range of vehicles, hence, it was not just exclusive to GM cars. The TH400 was launched by General Motors in 1964, as a replacement to the ST300 2-speed automatic transmission. of input torque, nonetheless, aftermarket designs that have been modified may go beyond that rating. This placement is aimed at providing the best power ratio and durability for rear-wheel drive. The GM TH400 transmission is a three-speed automatic transmission that was longitudinally positioned behind the engine. The TH400’s high-level of adoption could be tied to its remarkable features, and it proved that people can once again rely on GM transmissions.īut what were these features sported by this durable and legendary transmission, and generally, what set it apart from other transmissions from this manufacturer? An overview of the TH400 transmission will give you a better idea. This popular transmission was found in GM’s cars, as well as, Rolls-Royces, Jeeps, Jaguars, Ferraris, etc. it is tbi still, but wished it was carb and not having OD or lockup doesn't make a difference for me.The TH400 or Turbo 400 is a good transmission that was used in several cars years ago. The th350 is plenty strong enough we drive the thing everyday and with 3.42's and 30-31 inch tall tires it's great on gas mileage. for the modulator and hook up the kickdown cable which should hookright on the tbi where the 700 did in your case it can hook to the carb, and you can t off the big port in back of the carb, or maybe the intake. All you need is to tap into a manifold vac. The corssmember stays in the 700r4 position no holes drilled nothing. It'll bolt right to the 700r4 t-case adapter and uses the same mount since the mount is on the t-case adapter, the 700r4 column linkage bolts right to it and works, just d is actually od now on the dash, the lines bolt up, it's easy as cake. Northernautoparts has it I know, but my trans guy got it from his supplier. The kit is like $150 or more and comes with dipstick, kickdown, spacers, gaskets, bolts, the shaft, and a dust cover. ![]() ![]() My truck had a 700r4 and I had this one built with a kit from tci or trenzpak fitzall or whatever, has a special rear shaft and spacer and makes it bolt in the exact place of a 700r4 no mods needed, direct bolt in and go.
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