As previously stated, the transmission is popular in high performance applications and can be affordably built to manage a tremendous amount of power and is praised for its high strength to weight to ratio. The transmission, like other automatics, relies on the Simpson planetary gearset, which revolutionized the operation of the automatic transmission. This build utilizes a new SFI case and bellhousing, aluminum direct drum. We’re offering a 2 speed TH400 for big power and drag radial applications. The "3" stands for three speed, the "L" for longitudinal (mounted), and the "80" for a GVWR of 8,000 lbs. Our stock rebuild is strong enough for over 600 HP repeatedly yet functions like a stock transmission. The name changed in 1987 to the 3L80, which was essentially the result of General Motor's new drivetrain naming convention. In trucks, the TH400, or "Turbo 400" as it is often referred to, the transmission was used until 1990 when it was replaced by an overdrive evolution of itself, the 4L80E. It is slightly larger and marginally stronger than the TH350, as it was designed for use behind General Motor's various big block V-8 engines. It has been given a conservative input torque rating of 450 lb-ft, although its application in many high performance vehicles suggest that the transmission can handle much more abuse. Good Luck and don't give up.you will get there.The Turbo Hydra-Matic 400 transmission made its first appearance in 1964 Cadillac models. How to Identify Your Transmission TH350 and TH400 Transmissions can be. To install a TH-400, use a TH-400 32-spline slip-yolk and move the crossmember back 6 inches. I may have left something out too but this will give you the general idea. speed, AKA the Turbo 400, TH-400, or THM400. The Powerglide is a 27.75-inch-long two-speed transmission with a 27-spline output shaft. I just finished turning the Wife& Kids Strip/Street Rally Nova into a Clutch car from an automatic but I already had 99% of the stuff I needed.and who knows you may too but this is what I know it takes at the very minimum to get a 4 spd versus a Automatic car. Each Heavy Duty Extreme Transmission from Wholesale Automatic Transmissions is built to perform and comes fully dyno and quality tested with a written. So when you compare the 2 cost wise.well there again it depends on what your budget will allow.you be the judge. Ring gear failure shield.and if your drag racing I would recommend some sort of cooler either a separate Cooler with a Fan of it's own and remote mount it out by your radiator. Now called the 4L60, the name indicates a 4-speed transmission rated for 6000-pound cars. In 1990, the 700R4 switched to GMs modern transmission designation style. As technology continued to advance, so did these transmissions. ATI SuperCase recommended over 2000 HP 2-Speed Max-Duty Outlaw T400 Transmission 1,800 to 3,000 HP Max rating, depending on options. Now for Drag racing here again certain classes require certain things like a SFI Flex Plate The result was a transmission that was up to 30 more fuel-efficient than their predecessors. ATI now has an answer for this market and offers three variations of a 2-speed Turbo 400 OEM cased units are rated to 1800 HP and not intended for heavy weight cars. The short-tail transmission is a perfect option when you want to buy an older car with a turbo 400 as there are not many options with this type of transmission. A turbo 400 transmission has been around for a long time and has been used in many different cars. The Turbo 400’s First gear ratio of 2.48:1 offered excellent gear multiplication and it soon became the first choice for. The TH350 employs a deeper 2.52:1 first gear ratio which improved initial acceleration compared to the Powerglide. ![]() You may need a different crossmember as well. A turbo 400 transmission is one of the most popular car transmissions on the market. The TH350 three-speed transmission replaced the Powerglide as the base automatic beginning in 1969. ![]() you will need a Hyd Throw out bearing, lines and slave cylinder and so forth but mechanical is way less troublesome.)įor Drag racing depending on the class your going to need either a regular Aluminum Bell Housing or a SFI Blow proof one w/Motor Plate (this is based on how fast you will run) if it is set up for a Automatic or Clutch car.so some of the parts you may need you already have but this is what it I can think of right now that it would take to do either, and don't misunderstand I am not trying to steer you one way or another.Ĭlutch Pedal assy (including all the Linkage,Brackets,springs and Etc.) This may help you decide.and please don't get me wrong up until we got our current Race car I had never ran anything but a Gear box and I have run just about everything from a Saginaw in a 1968 Camaro with a 327 that I raced like twice during the short time I owned it.(and shelled the Cluster Gear on the third Pass) to our last car that we sold several years back and it too was a 1968 Camaro but I ran Modified Production with a Built 427 BB and it had a Lenco in it so I have a little experience.
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