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Old 02-04-2004, 05:36 PM   #1
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Join Date: May 2002
Location: Elk Grove, CA
Posts: 206
Car: 1988 Pontiac Trans-AM
Engine: TPI 350 (5.7L)
Transmission: 700R4

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700r4 HP and torque Rating

Anyone know the HP and torque rating of the 700r4 Trans. I may have to have mine rebuilt. I would like to know what the factory specs are before I have it done.

For example: If I decide to put a 350 hp motor in the car will the trany need to be built up.

I have done a few things to the motor( see sig) and need to know were the line is. The car will most likely never see a drag strip. Thanks
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1988 T/A 350 TPI, purchased new.

Mods:
Suspension: Eibach pro kit springs, KYB struts, shocks, and TDS wonder bar, SFC's
Induction: K&N air filter, 52mm throttle body, port matched SLP runners and plenum. AFPR
Exhaust: Hooker headers with Jet-Hot, Catco cat, and Hooker Cat-back.
Tranny: built up 700r4 with Trans-go shift kit
cooling: Griffin radiator,185 Degree therm, 200 degree Fan switch
Future modes: New seats

Last edited by Roads88; 02-05-2004 at 03:16 PM.
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Old 02-06-2004, 02:05 AM   #2
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Pontiac Firebird's: 91 Formula 350, 01 Trans Am WS6, Suzuki's: 09 SX4 Crossover, GSX-R's: 06 600 & 07 1K.
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Old 02-06-2004, 02:10 AM   #3
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Join Date: Oct 2001
Location: Englewood, CO
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Car: 1990 Trans Am
Engine: Lb9
Transmission: factory T5
Axle/Gears: 3.08 limited slip

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if its an untouched stock tranny, id personally get it rebuilt and built well. 700's are weak. And its torque, not hp that will kill it
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Old 02-06-2004, 02:26 PM   #4
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Join Date: May 2002
Location: Elk Grove, CA
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Car: 1988 Pontiac Trans-AM
Engine: TPI 350 (5.7L)
Transmission: 700R4

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Thanks for the info.

I agree torgue is the major killer.


The link posted provided the info: its around 325 hp and 400 ft lbs. of torgue.

If im going to drop a bunch of money getting it built up, Im may just go whole hog and get a T-56. I wanted a stick when I got the car, but they just didn't make them,...sigh.

Odds are it will be a long time befor I can do that. So a standard rebuild may be the order of the day and in a year or so get a t-56.


Thanks again.
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1988 T/A 350 TPI, purchased new.

Mods:
Suspension: Eibach pro kit springs, KYB struts, shocks, and TDS wonder bar, SFC's
Induction: K&N air filter, 52mm throttle body, port matched SLP runners and plenum. AFPR
Exhaust: Hooker headers with Jet-Hot, Catco cat, and Hooker Cat-back.
Tranny: built up 700r4 with Trans-go shift kit
cooling: Griffin radiator,185 Degree therm, 200 degree Fan switch
Future modes: New seats

Last edited by Roads88; 02-06-2004 at 02:29 PM.
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Old 02-06-2004, 08:37 PM   #5
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Join Date: Dec 2003
Location: Newark, DE
Posts: 2,391
Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00

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At the very least get more 3-4 clutches and use a Vette servo. A good shift kit and the trans will hold up for much longer than you think.

I just swapped in the T56 when mine went, but I also had the money at the time.
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Old 02-07-2004, 12:27 PM   #6
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Join Date: May 2002
Location: Elk Grove, CA
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Car: 1988 Pontiac Trans-AM
Engine: TPI 350 (5.7L)
Transmission: 700R4

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ok, Thanks


did you do thew swap yourself? If so how much time did it take and did you get the car on a lift?
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1988 T/A 350 TPI, purchased new.

Mods:
Suspension: Eibach pro kit springs, KYB struts, shocks, and TDS wonder bar, SFC's
Induction: K&N air filter, 52mm throttle body, port matched SLP runners and plenum. AFPR
Exhaust: Hooker headers with Jet-Hot, Catco cat, and Hooker Cat-back.
Tranny: built up 700r4 with Trans-go shift kit
cooling: Griffin radiator,185 Degree therm, 200 degree Fan switch
Future modes: New seats
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Old 02-07-2004, 09:40 PM   #7
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Join Date: Dec 2003
Location: Newark, DE
Posts: 2,391
Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00

Classifieds Rating: (0)
I did the swap myself. No access to a lift at the time. I used 4 jackstands and a couple of 4x4s to get the car up in the air high enough.

It's tough to say how long it took. I did a lot of other things while I was doing the swap. I built a complete new dash out fo steel and aluminum for one, and that took a lot of time. I also completely rebuilt my trans before I swapped it in, plus I added a steel 3-4 fork.

If I just had to do the swap I'd say a full weekend wouldn't be a problem if you have everything on hand, all the tools you need, adn a friend to help you wrestle with the trans.
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Old 02-08-2004, 02:49 PM   #8
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Join Date: May 2002
Location: Elk Grove, CA
Posts: 206
Car: 1988 Pontiac Trans-AM
Engine: TPI 350 (5.7L)
Transmission: 700R4

Classifieds Rating: (0)
Thanks for the info.
__________________
1988 T/A 350 TPI, purchased new.

Mods:
Suspension: Eibach pro kit springs, KYB struts, shocks, and TDS wonder bar, SFC's
Induction: K&N air filter, 52mm throttle body, port matched SLP runners and plenum. AFPR
Exhaust: Hooker headers with Jet-Hot, Catco cat, and Hooker Cat-back.
Tranny: built up 700r4 with Trans-go shift kit
cooling: Griffin radiator,185 Degree therm, 200 degree Fan switch
Future modes: New seats
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Old 02-08-2004, 02:49 PM
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