The fluid pan shape is irregular (see image, left), being likened unto a distorted Texas pattern. The rear mounting face of the transmission has a hex bolt pattern with ribs running forward longitudinally. The 400 transmission has a main case of cast aluminum alloy with a length of 24-3/8' long.

Later AMC versions had their own case with no adapter. The early versions had factory block adapters. The TH400 came in 2wd or 4wd Jeeps, coupled either to the popular Model 20 (or Model 21, in a few rare cases) transfer case or the Quadra-Trac, the latter being an option from 1973 to 1979. This list is of the Jeep powertrains that had this excellent transmission. The TH400 and Jeeps have quite a history together. This electronically controlled transmission remains in production and wide use in heavy-duty GM and military applications. An overdrive version of it was introduced as the 4L80-E.

They are found in GM's, Jeeps, Jaguars, Rolls-Royces, Ferraris and others.Īs with other GM transmissions, GM changed the naming scheme of the TH400 in 1990 and it was then referred to as the 3L80 ( 3-speeds, Longitudinally positioned, 8000 lbs. It is an immensely popular transmission in the automotive industry as well as the aftermarket. The 400 was not just a GM exclusive transmission. The TH400 made its way into heavier duty GM trucks in the 1970's in 2wd and 4wd configurations. An innovative variable pitch stator was available in the 1965-1967 cars that could essentially vary the characteristics of the torque converter. The Turbo 400 was introduced in 1964 in Buick and Cadillac cars and in Chevrolet and Oldsmobile cars the following year. Aftermarket building techniques take it well past that figure. The TH400 is conservatively rated at 450 ft. It is widely regarded to be a supremely durable and legendary transmission. The TH400 is an automatic shift, three-speed, longitudinally positioned transmission. Ford 1.8L - 2.5L 'Pinto' Engines into the Jeep.Chevrolet, Buick & GM Engines into the Jeep.

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