im buying a new tranny cuz my new motor blew my old one about a month after i put the motor in.i need a new 700r4 tranny but i need to get a horsepower estimate to match a tranny so it wont blow so easy. i have a
89 gta trans am
383 stroker tpi engine with the following;
.30 over speed pro hypereutectic pistons 10:1 64cc
5.7 eagle h beam rods
stock heads just rebuilt
lt4 hotcam
eccel coil wires
slp runners
adjustable fuel regulator
hedmann 1-5/8'' Tubes 3'' Collector and y pipe
3"exhaust no cat flowmaster muffler
and a handfull of bull**** tpi ez mods
stock ecm
also any suggestions with tranny rebuild or maybe info for swap to turbo350

 

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I cant help you much on 700R4's but if you are willing to lose OD and go TH350 then do it. It'll be cheaper and stronger in the end. My TH350 sat in a old dead lady's car for over 15 years, got pulled out, then sat outside in the rain for several months. My friend threw everything in a parts washer and did a basic no-frills rebuild with a shift kit. It has lasted for about 2 years with countless 11-12 second 1/4 mile blasts and thousands of miles of street abuse (I mean serious abuse...). Total investment was about $650 for trans, convertor, swap kit, shifter, and misc parts. TH350 swap is extremely easy as long as you select the right parts.