Next week I am getting my transmission rebuilt. I am getting a great deal including a new TC. So I am not too sure on what parts are going in it. I plan to also have a firm shifting shift kit also. Right now my car has around 270 hp, which I know the tranny can handle, but I was looking in JEG's and they have a Holley 144 Powercharger that on a stock engine can produce around 100 hp. This will bring me up to around 370 hp, will a freshly rebuilt tranny handle this, or do I have to make sure I get hi-performance rebuild parts.

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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
UNDERDRIVE PULLEY
ACCEL HEI DISTRIBUTOR
2:73 GEARS

 

You need to do all of the updates & improvements if you expect this trans to last (Corvette servo, .500 & .296 boost valves, Borg Warner Hi-Energy 2-4 band & 3-4 clutches, Trans-Go Performance Shift kit, Trans-Go steel rings in the front pump, etc.)
If you have any questions you can call me at 800 7763288 Mon-Sat 11-7 PST and I will do my best too help!

 

Straight from the GM textbook.
"700R4 transmissions are capable of handling 350 HP and 400 lbs-ft torque." I don't think a stock trans will handle this amount unless it's new, but if you rebuild it properly you can safely back-up 400 HP.

 

Yes, stock they are more limited but with the TransGo parts it is good for 600 HP.