Will A Turbo 400 Torque Converter Work In A 700r4?

What year is the best 700r4 transmission?

1987If you locate more than one of these transmissions, it is best to select the later model TH700R4.

Design improvements were constantly added throughout the years it was offered.

Generally, 1987 and up TH700R4s or 1990-’93 4L60 units are the most desirable..

Are Turbo 350 and 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.

How much HP can a stock 700r4 handle?

Re: How much power can a stock 700r4 handle? Stock is rated at 350 hp however some people have had trouble with them at around 300 hp. Since you are not drag racing with slicks, upgraded 700r4 will be fine. The kit mentioned above is great and can handle 550+ hp.

What transmission is better Turbo 350 or 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.

How can you tell if a 700r4 is good?

Find one that has the dipstick in place and look for signs of leaks. The vehicle from which the tranny is being pulled should give a clue to its reliability. Ask for at least a partial refund if the tranny is found to be bad. If you find at least a 85+ tranny it’s a good core to rebuild.

What years did Chevy use the 700r4 transmission?

The four-speed Turbo Hydra-Matic 700R4 was introduced for the 1982 model year for use in Chevrolet/GMC vehicles.

How long does a 700r4 transmission last?

I’ve seen at least several people on this board say that the original 700r4 lasted over 100,000 miles but the replacement or rebuilt trans were only lasting 20-30,000 miles and therefore the 700r4 must be junk.

Does a 400 Turbo transmission 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. This means that with a 3.55:1 rear gear, the overdrive drops the effective rear gear ratio to 2.66:1. This makes the first question more about torque converter selection.

Which 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 do I make my 700r4 shift harder?

By drilling out a few holes in the spacer plate, installing a larger servo (553) and a larger boost valve, the transmission will shift quicker & firmer. Getting a 553 servo should be easy as many V8 folks remove them to upgrade to the 093 (Vette) servo (offer ten bucks for one).

How much longer is a 700r4 than a Turbo 350?

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.

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”.

What is the difference between a Turbo 400 and a 700r4?

700R4s have a great 1st gear ratio. putting in a th400 allows you to put lower gears in the rear for drag racing. th400 will handle much more tq than a 700r4 though.

Is a 700r4 a good transmission?

The Bottom Line. The 700R4 is one of the best automatic transmissions that was launched by General Motors. It was renamed to the 4L60, and the latter also became a popular transmission name. Today, more enhanced transmissions have been launched, and they can still find their roots to the 700R4.

How much HP 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.