Just like the title says.. how much hp/torque is too much for an MR 4th gear? Is there any option other than a 5sp tranny that could strengthen 4th??

 

pickup the phone & call shops or go to their sites. u might learn a thing or 2 by researching...

 

Well I am pushing 400whp and 350 torque using a Buschur 3065 kit with an Aquamist going in next week. I havent broke it yet but I cant say that I am not trying.

 

500+ call it a day and get a 5 speed. Also when making more power you feel like your shifting right at the joy moment.

 

I have heard that a good aftermarket trans cooler helps keep the heat down and therefore you won't overheat 4th. Otherwise don't do too much auto X in it and it should hold up, at least for awhile.

 

...

 

I would say asking the people on this forum is "research".

 

there is never too much power, the problem is not enough traction.

 

We made a solid 600+ on our Time Attack car for a while with the 6spd.

( Notice I said awhile lol. We blew that thing up like an inflatable sex doll)


Mitch

 

I lol'd

got about 350trq right now, i have heard the same thing that around 500 seems to be the point where you need to switch over.

 

im right around the same power as mitch, no problems.....yet, lol

when i had a 30r, 500whp didnt seem to be a problem, and i made about 25 passes at the strip

 

does shep rebuild the stock trans or is it a new trans? i say this because i have a 6sd and if i blow it up one day and i want a shep 5sd what do i do with the 6sd?

 

Good, then it will hold long enough for my build, that's all I needed

 

Well I am not sure how much longer my 6 speed is going to last but I do have a spare 5 speed I am getting ready to send to TRE to get rebuilt when I do finally kill the 6.

 

Your transmission is designed for stock power levels. It may be over engineered and handle more, but there is no quantitative value to answer your question. Someone with 400 wheel torques could make the tranny last forever and someone else it may last a month.