How much horsepower can a Turbo 400 transmission handle?

About 400-450 HP/TQ is the limit on the stock TH400. With ONE almost free modification and some minor valve body calibration changes, 800 HP on an otherwise stock TH400 is not a problem if it’s assembled well (good endplay, etc), and the 34 element sprag is a wise addition above 450 HP or any drag usage.

Is a Turbo 350 torque converter the same as a Turbo 400?

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.

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.

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.

How strong is a Turbo 400 transmission?

The TH400 has been rated at 450 ft. lbs. of input torque, nonetheless, aftermarket designs that have been modified may go beyond that rating.

What is a good highway gear for a TH400 transmission?

TH400 gear multiplication with a 3.08 will net you decent highway mileage at the expense of bottom end acceleration. Whereas a 4.10 rear end will snap your neck with a stout motor in 1st, but you’d be stopping for gas much more often and be taching out at high rpm at highway cruising speeds.

How many gears are in a Turbo 400?

three
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.

How good is a TH400 transmission?

The TH400 is an automatic shift, three-speed, longitudinally positioned transmission. It is widely regarded to be a supremely durable and legendary transmission. The TH400 is conservatively rated at 450 ft.

Is the Turbo 400 transmission a 3 speed or 4 speed?

The GM TH400 transmission is a three-speed automatic transmission that was longitudinally positioned behind the engine. This placement is aimed at providing the best power ratio and durability for rear-wheel drive.

Are TH400 transmissions good?

An overview of the TH400 transmission shows it is a durable transmission that can give a good performance. The TH400 was used in a wide range of cars from GM as well as other manufacturers. Interestingly, the transmission can be adapted for use in several engines today.

How much torque does a GM TH400 transmission have?

Can a GM Turbo 400 be used as a 4WD transmission?

This transmission makes an excellent conversion transmission due to its adaptability into most Jeeps longer than CJ5s. Both 2wd and 4wd versions of the Turbo 400 can be used equally well, and there are no inherent advantages to either one once you have installed our adapter assembly.

Is the ATI Turbo 400 a 2 speed transmission?

Today’s high HP racer needs a durable transmission with a less aggressive starting line ratio. Most racers achieve this by converting the Turbo 400 transmission to a 2-speed unit allowing them the ability to leave off the transbrake in 2nd gear. ATI now has an answer for this market and offers three variations of a 2-speed Turbo 400!

Is the Buick Turbo 400 compatible with the Buick TH400 transmission?

These differences only affect the front bell of the case, and all Turbo 400 cases are largely similar from that point back. Buick engines and TH400’s are natively compatible when choosing a Buick V8 or V6 version of the transmission.