I am undecided as to weather or not I should spend a tone of cash for a 700r4 again or just build a TH350. I have a built motor making almost 450ftlbs NA. I will also be spraying a 200 shot on top of that. I have had 700's last but not with that much HP and TQ. Any opinions would be great. I had a 2800 10in non lock up stall in my 700, and was think ing of going to a TH350 with a 3500 stall. I know the TH 350 can handle that and a 700R4 could too if I spen 2000.00 bucks. I really do not want to spend that kind of money for a Tranny that might last. ANy help would be great..



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Im in the same boat.I just rebuilt my 700R4 3 months ago,only to blow it up 2 weeks ago.
I cant decide to either spend $2500 for a built 700R4 or go with a TH400 that can handle the power.The ony thing is,that I like the overdrive on the highway.
When I get to the track this spring,this car should run 11's with 175HP nitrous shot.
Nitro Don


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1990 Trans Am WS6
305TPI 700R4

ENGINE:
150hp NOS kit
March underdrive pulleys
Edelbrock headers(JetHot)
Mac off-road pipe
Flowmaster exaust
Jacobs ultra coil
K&N filter
Fulley ported base,
runners,& plenum
Crane AFPR
Hypertech airfoil
Crane 1.6 rockers
210/220 .533/.544 Cam
W/P Torquer heads
Edelbrock TPI Base
Edelbrock TI Runners
Edelbrock 52mm T.B.
TRANSMISSION:
Richmond 3.73's
Auburn posi
B&M Mega shifter
B&M Transpak
Vette servo
B&M 2400 converter
TCI Trans Rebuild
Nitto Drag radials
FUTURE MODS:
The 700R4 is DEAD!!
Neeed to rebuild AGAIN!!
BEST RUN:
12.48 @ 109.23 MPH
(with stock heads,cam,intake,and crappy Pep Boy's tires)

 

I too HAD this problem. I installed the TH-350 and things have been O.K. Installion wasn't too big of a deal.

I am currently struggling with the torque convertor. I was told that the TC that came w/ the trany was a 2400 stall but it wasn't.

Now I need to change the TC and I am tring to figure out how to install a Lockup convertor. Because I didn't install a TH-350C, which I am told has the ability to control a lockup TC.

The highway driving isn't too bad at all. Gas mileage went down a bit and it would still be nice to have OD but once I got used to it I can hardly remember what it was like.

 

Check out transmissioncenter.net. They claim their 700R4's can handle 600hp. They have a pretty impressive write up on it and it comes with a torque converter with whatever stall you want.

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'91 GTA with TPI 350 & T-Tops. Just a few mods, if you want to find out just line up next to me at a stoplight!

 

There is also a website that claims they have a setup that can handle 600hp, the website is www.thetrannydoctor.com