Table of Contents
Are all 700R4 interchangeable?
From 1982-1984, the TH700R4 came with a 27-spline input shaft. Later production units were equipped with a 30-spline input. Although the later 30-spline version is more desirable, both units can be interchanged if the proper mating.
What year 700R4 do I have?
If you find 2 letters, the transmission is made between 1982-1985. If you find 3 letters, the transmission is made between 1986-1993. The last way to identify if it’s a 4L60 or a 700r4 is to look at the rear of the transmission for the Aux TV Cable or wirings, as discussed before.
What’s the best year 700R4?
The best cores for a 700R4 build were from 1987-92 they had all the factory upgrades that solved the lubrication issues that plagued the ’86 and earlier units.
What is the difference between a 700R4 and a Turbo 350?
The 700R4 has an overdrive while the TH350 does not. Overdrives allow for high-speed cruising, which saves fuel while lowering torque.
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.
Can a 700R4 handle 600hp?
The 700R4 can be built to handle 600 700 HP fairly easy with the right parts and the right torque converter as long as you start with a 1988 & later transmission. If you are going to have more than 750 horsepower, and you have a choice of transmission, then the 4L80E would be the way to go.
Can you swap a 700R4 with a TH400?
Yes there are aftermarkets for both but stock, they’re the same and rated for the same input torque. If I was going to have a crappy TH 350 I’d much rather have a 700R4 which has a better 1st gear, and overdrive to boot.
Can you run a 700R4 without a TV cable?
There are no TV cable, mechanical speedometer drive, or governor provisions. To run a 700-R4 trans behind a carbureted engine without a computer, at the very least the TV cable must be hooked up to the carburetor and properly adjusted.
Is a 700R4 better than a TH350?
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.
What does the governor do in a 700R4?
The transmission governor on a 700R4 is used to regulate the speed at which the transmission shifts into the next higher or lower gear. It accomplishes this through the use of two sets of centrifugal weights, each a different weight.