Question: Is The Turbo 400 A Good Transmission?

What’s the difference between Turbo 350 and Turbo 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..

Which transmission is better th350 or th400?

Automatic transmission fans will tell you that a TH400 is a stronger transmission, but the TH350 is shorter (meaning easier to adapt in smaller-bodied cars), and it saps a lot less horsepower from the engine to make it work. … These transmissions weigh about 125 pounds.

How much horsepower can a Turbo 400 transmission handle?

400-450 HPAbout 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 700r4 better than a th400?

The TH400 is much stronger, but it doesn’t have overdrive and the first gear is only 2.48:1. The 700R4 has an overdrive gear (0.7:1), and a 3.06:1 first gear, but it’s not as strong. So it depends on what your using it for and how much power you have.

How much horsepower can a stock powerglide handle?

2,700 horse powerA PowerGlide will hold 2,700 horse power.

Is a th400 longer than a th350?

You didn’t do a swap from a long TH350 to a short Th400, More likely a short TH350 (6″ tailhousing), to a short TH400 (4″ tail). In that case the Th400 is about 1/2″ longer.

What cars had a Turbo 400?

GM TH400 Automatic TransmissionThe Turbo 400 was introduced in 1964 in Buick and Cadillac cars and in Chevrolet and Oldsmobile cars the following year. … The 400 transmission has a main case of cast aluminum alloy with a length of 24-3/8″ long. … There are two significant variations of the TH400.More items…

Are 700r4 transmissions any good?

Its lower first gear ratio provides excellent performance for low vehicle speeds. Besides, a 30% overdrive brings about enhanced fuel economy, a reason that can also be attributed to the popularity of the 700R4. The torque that can be handled by a 700R4 transmission varies depending on its production year.

How much is a Turbo 400 transmission worth?

$150-$175 for one you can use as is.

How much horsepower can a Turbo 350 transmission handle?

We feel they are a very good choice in cars up to 600 HP/TQ but capable of up to 800 HP/TQ especially in lighter cars. The limiting factor is the stock planetaries. There are aftermarket planets available to make them live at even higher power levels but we usually recommend a TH400 for a dedicated 600+ HP application.

What transmission is best for racing?

Manual transmissions are lighter. Automatic transmissions that are specially designed for strip use shift quicker when tenths of a second count. If you’re on a budget and building a car that will run in the mid- to high-ten second range, a manual transmission is going to be the best option.

What’s better 700r4 or Turbo 350?

The 700R4 has an overdrive while the TH350 does not. Overdrives allow for high-speed cruising, which saves fuel while lowering torque.

Are Turbo 350 and Turbo 400 torque converters the same?

They are interchangeable, if you use the 13″ converter in a TH350, be sure it clears the case. If you are doing a TH400 deal, use the TH350 converter… Be sure the flexplate is drilled for both patterns.

Will a Turbo 350 replace a 700r4?

Since the th350 (w/ 9-1/4″ tailshaft housing) is only 1/8″ shorter than the 700r4, you can reuse the existing driveshaft and yoke. The transmount interchanges, in my case the original 700r4 transmount is a simple “puck”.

How many gears does a Turbo 400 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.

How does a Turbo 400 transmission shift?

The TH400 transmission takes advantage of an electrical slide switch controlled by the throttle linkage. On the other hand, the TH350 uses a mechanical cable kick-down that is connected to the throttle linkage. Despite the difference, the TH400 is considered the heavy-duty version of the Turbo-Hydramatic 350.

What is the best transmission for 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.

Can a 700r4 handle 500 hp?

Quote: The Street/Strip 700R4 is good for about 550 hp maximum, but with the HD input drum it is good for about 625 hp max. Add another $240.00 for the input drum. I give a one year warranty with all my transmissions & torque converters.

Is a th350 stronger than a 700r4?

While a vehicle with 4.11 gearing may scream down the highway with a a TH350, it’s going to keep the engine in the power band longer. The 700R4 goes from a 3.06 -> 1.62 1-2 shift, which is way more aggressive than the Turbo 350’s 2.74 -> 1.57. Simply put, the TH350 is going to keep the vehicle in the power band longer.

Does a Turbo 400 have overdrive?

The 4L80E is just a longer, heavier, overdrive version of the TH-400. It uses the same first three gear ratios but adds a 0.75:1 overdrive.

Does a Turbo 400 have a kickdown cable?

Instead of a linkage or cable, the TH400 uses an electrical switch that is most often mounted on the carburetor. … The factory used a switch located on the carburetor or on the throttle linkage under the dash that at WOT supplied voltage to the transmission.