Your question: What transmission is better Turbo 350 or 700r4?

IMHO the 350 is much stronger, and you can build it for less than half ($200) the 700r4 is an AOD and has a reduction in the final drive(OD) so yes, your engine will spin more RPM’s with a 350. Depending on your tire size and axle ratios will depend on how fast it will turn.

How much longer is a 700R4 transmission 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.

Can you swap a 700R4 with a TH350?

This swap is possible, most go the other way TH350 to 700R4. Driveshaft length needs to be adjusted. Shift linkage will need to be corrected, I recommend getting an aftermarket floorshifter it makes the swap easier.

How much HP can a 700R4 handle?

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.

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What year is the best 700R4 transmission?

If 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.

Is a 700R4 the same length as a Turbo 400?

Registered. edit: okay, AA sez the 350 is 21.5″, 700r is 23.375″, 4l60e is 21.875″, and 400 is 24.25″.

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. In 1990, the Turbo Hydra-Matic 700R4 was renamed the 4L60.



700R4 / 4L60 / 4L60E / 4L65E / 4L70E / technical description.

Gear Ratio
R 2.29:1

Is a 700R4 better than a TH400?

For a daily driver on the highway a 700R4, for a mudder truck definitely the TH400. For any rig it’s going to depend on the purpose. 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.

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.

How much horsepower can a Turbo 350 transmission handle?

The Stage 1 TH350 is rated up to 450 hp. Those seeking something a little stronger can check out the Stage 2 version (PN PA35102) that holds 550 hp and retails for $1,500 with a real world street price of $1,175 from most vendors. Both transmissions come with a standard one-year warranty.

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Can you run a 700R4 without a computer?

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.

Will a 700R4 bolt up to a 454?

Yeah a stock 454 won’t kill a stock 700r4 unless you’re planning on towing with it or hot rodding the 454 some day. Once you upgrade something though you’ll have a hard time with the weak parts like planetary, power band, output shaft. All of those should be upgraded if towing or building the engine are in your future.

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