What tranny can handle the most power. I have an 88 GTA now with a TH-700R4 and I was thinkin about doin a T-5 swap, but my friend says a 700R4 is actually stronger. Is this a fact? Could somebody please show me a list of the kind of horsepower/torque ratios these transmissions can handle?

 

I hear the T-5 can handle relatively little torque, I would say the 700R4 is stronger (thats why they put em on 350's instead of the T-5's) but you'll hjave to ask somebody else by how much.

-Max

 

The t-5 is only rated for a max of 300 ft lbs. I think the WC T-5 can handle about 20 more. A 87 and later 700R4 stock I think can handle about 400. Don't quote me on that but it seems that is the number I remember. The 700 is a stronger transmision. That is why they only put the 700 behind the 350 instead of the t-5. You think that the lazy asses at GM could have figured out that they were being supplied with a ****ty transmission for performance vehicles.
bsa

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"If they do not run, Then they will die." - Stonewall Jackson
#3
'87 IROC, 355 TPI, Converted to SD, 700R4, B&M Megashifter, 3.42, Trick Flow Twisted Wedge Heads, Edelbrock Intake, Accel Runners, Comp Cam, Crane Gold rockers, Lucas 23# injectors, Edelbrock headers, Flowmaster 3'' exhaust, Mallory Ignition, Transgo Performance Shift Kit, Corvette Servo, 2,000 Stall Torque Converter

 

Who makes rebuild kits for the T5 so that it can handle a nice 350?

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1980 Camaro, '88 Police 350 engine, Headers, full exhaust, completely redone, my baby!
1988 Iroc-Z L98, MSD 6a, Accel coil, K+N's, Airfoil, Coolant Bypass, Flowmaster, Gears, Late model Bose, I like the 80 better

 

The T-5 can handle 330 FT-LBS of torque, the 700R4 can be built to handle twice that. If you have your heart set on a manual then get a T-56. That's a 6 speed that is rated for 450 FT-LBS.

 

Hey Todd!! Told ya!!

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'88 IROC TPI 355, '69 truck 4-bolt, fully balanced, 9.75:1 compression, fully ported '70 truck heads(for now), Harland Sharp 1.6 Roller Rockers, Comp Cams CS 252AH-12, ported '86 TPI converted to speed density, Crane AFPR, Flowmaster 3in. exhaust, Edelbrock TES headers, all emissions equipment is still intact, plan on burning my own chips, many more mods and parts on the way as time and money permits =(
Best E.T. with TBI 305: 16.11 @ 82mph
Haven't been to track with new motor
If you have any questions on converting from TBI to TPI email me at jdkchevy70@yahoo.com
In memory of Dale Earnhardt, I'll miss cheering for that black #3 on raceday!!!