They are completely different transmissions. The Turbo 400 is larger, longer, and heavier than the Turbo 350 and was designed to live behind higher-torque applications such as big-blocks. … If you’re worried about the ultimate strength of the transmission, consult one of the transmission specialists for upgrades.
Is a Turbo 350 and a Turbo 400 the same length?
The overall length of the TH-400 is 38 inches, while the overall length of the TH-350 is 33 5/8 inches, if both use the longest tail shafts available. The TH-400’s body is 25 inches and the TH-350’s body is 21 5/8 inches long.
What is the difference between a 350 Turbo transmission and a 400 Turbo transmission?
The Turbo 350 (top) and the Turbo 400 (bottom) are the quintessential GM automatic transmissions. Both are three-speeds, but the Turbo 400 is physically larger and designed more for the torque capacity of big-block engines.
Which is better Turbo 350 or Turbo 400?
The Turbo 350 works exceptionally well with modestly powered cars, but the more durable Turbo 400 is better equipped for high-performance vehicles.
How do I know if I have a TH400 transmission?
It is identified easiest by its “375-THM” designation cast in the underside of the tail housing. The TH475 was an extra-heavy-duty version, and was found in larger trucks from 1971 on. If you are trying to determine the TH400 from another in a vehicle, a fast way to tell is to look at the kick down mechanism.
Are all Turbo 400 the same?
They are, for the most part, interchangeable on the same vehicles; however, you would normally find the TH400 in larger engine applications because they are able to function more reliably at higher engine rpms.
What vehicles did the TH400 come in?
Upon its launch, the TH400 was evident in Buicks and Cadillacs, and a year later, it was used in Chevrolet and Oldsmobile cars. Buick, Olds, and Cadillacs that were later launched between 1965-1967 also featured the transmission but with an innovative variable-pitch stator.
Is a Turbo 400 transmission a 4 speed?
The Turbo 400 transmission was a 3 speed automatic transmission developed by General Motors. … Overall the transmission remained in production an impressive 27 years before it was eventually replaced by a 4 speed electronically controlled transmission, the 4L80E, in 1991.
Does a TH400 transmission have overdrive?
Some refer to the 4L80E as the TH400 with an overdrive ratio, as much of the internals are interchangeable. TCI has a complete line of 4L80E transmissions in the Street Fighter and Super Street Fighter trim levels.
Is a Turbo 350 the same length as a 700R4?
Length And Weight
The TH350’s case length is 21 5/8 inches. Depending on the tail shaft housing, its overall length can either be 27 5/8 or 30 5/8 inches. The 700R4’s case length is 23 3/8 inches and its overall length is 30 3/8 inches. The TH350 weighs 120 lbs., while the 700R4 weighs 155 lbs.
How much horsepower can a Turbo 350 handle?
The Stage 1 TH350 is rated up to 450 hp. Those seeking something a little stronger can check out the Stage 2 version (PN PA35102) that holds 550 hp and retails for $1,500 with a real world street price of $1,175 from most vendors.
How many gears does a 400 Turbo transmission have?
TH-400 transmissions are three-speed automatics, with a 2.48:1 first gear. Reverse gear is 2.08:1 and third gear is an even 1 to 1. Turbo 400s use three tail shaft lengths; the most preferred units for a GM swap would have the short 4-inch tail shaft.
What is the difference between a Turbo 350 and a TH350?
The TH350 is an automatic shift, three-speed transmission. … The Turbo 350 is the shortest and one of the strongest automatics that can be put into a Jeep.
What does TH400 stand for?
General Motors TH400
The Turbo Hydra-Matic 400 transmission was General Motor’s heavy duty, 3 speed automatic transmission. It first appeared in 1964, where it was used as a production option for Cadillac cars.
How fast can a TH400 go?
Registered. you can go much faster than 55 depending on gear ration and tire size. The th400 is not an overdrive, but the 6.2L can spin pretty fast. The tranny should have nothing to do with it.
What transmission fluid does a TH400 take?
It might appear that Dexron VI would therefore be backwards compatible as far back as the older TH350 and TH400 transmissions. The reality is that Dex VI is best only for newer vehicles.