im going to change out the tranny sometime down the road but was wondering if my stock t5 tranny will hold up for now with my motor. my motors pushing 400hp to the crank.

 

Depends on how you drive. I wouldn't expect it to hold high rpm clutch dumps. Just get roadside coverage with your insurance. Mine is about $15 extra per month for 3 cars.

 

Hard to say some people have no issues other blow them with stock engines. The shift into third is a bad thing to miss and they seem to hate shock loads. If you drive fairly normal then no big deal.

 

Yes it will hold up, I've been beating on mine for a long time. And I've got a built 355ci motor in my 89 IROC. Its all in how you drive it... I NEVER dump the clutch, if I want to blow the tires off I just slip the clutch and lay in the throttle. Just have to drive smart and not abuse it.

 

I agree drive smart it won't blow third gear out. I have a s10 with a 350ho crate and t5 3.73 gears and a locker beat it hard and dumped the clutch many times I finally blew third gear out being stupid it's fixed now. But I'm also converting my 91 z28 l98 to a t5 it's cheaper than getting another 700r4 and more fun to drive

 

now im gonna bashed for this im sure but i beat the snot out of my t5, and it was behind that 454. i went 13.5 at 101 mph last year if that helps. i used to just tach it up and dump it in second out front of my house lol... never an issue

 

ripped my t5 out first pull behind a 355 that was 400ish hp, took off in second gave it some juice, shifted to where 3rd was "supposed" to be and it wasnt there, along with 2nd, all i had was 1st gear 20 miles home at 12mph, it was a trip

 

You mustve been way lucky! I had mine go out in a stock engine!
Other then that I've noticed they do hold up to 400hp.
On one of my 355 it would shift perfect into.every gear.
No higher then 6500 rpms and I would never dump the clutch.