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What is the difference between a 350 and 400 transmission?

What is the difference between a 350 and 400 transmission?

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.

What kind of transmission will fit on a Chevy 350?

TH350. Best transmission choice, hands down. The Turbo Hydra-matic 350 was first used in 1969 model cars. It was developed jointly by Buick and Chevrolet to replace the two-speed Super Turbine 300 and aluminum case Powerglide transmissions.

How many speeds is a 400 transmission?

three-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 a TH400 and TH350 the same size?

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 tail shafts for the TH-350 are available in 6-, 9- or 12-inch lengths and the tail shafts for the TH-400 are available in 4-,9- or 13-inch lengths.

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.

Is a TH400 a good transmission?

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

What transmission can replace a TH350?

TH200-R4 is the other common retrofit option for a TH350. Pluses and minuses to both conversions, probably about the same $$. I went with up-rated 200-R4 to replace TH400 because it was a straight bolt in.

How much power can a TH400 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.

Are all TH400 transmissions 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 much HP can a stock TH400 handle?

Are all Turbo 400 the same?

What 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. lbs. of input torque.

What kind of transmission does a Chevy 350 have?

GM’s Chevrolet and Buick divisions developed the General Motors Turbo Hydra-Matic 350, a three-speed automatic transmission introduced for the 1969 model year. It eventually replaced the two speed Powerglide transmission. It is commonly referred to as “Turbo 350”.

What’s the difference between th 350 and 400 transmission?

TH-350 was a low-torque transmission. TH-400 was a high-torque transmission. It was used in heavy cars. It was used in light cars. The vacuum modulator is located on the right front of the transmission. TH-350 had a square pan, with one corner cut off.

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 GM TH400 transmission a 2WD or 4WD?

Despite the difference, the TH400 is considered the heavy-duty version of the Turbo-Hydramatic 350. The TH400 can easily be adapted for use in most Jeeps longer than CJ5s, and as such, it is an excellent conversion transmission. Whether it’s the 2wd and 4wd versions of the Turbo 400, either of these can be used.

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