Rear Diff

[gottalovenewage]

First off does anybody know of a company that can "beef-up" our rear diffs? From experience only, or first-hand knowledge: what brand rear diff would sustain 800HP/700TQ? Ive been looking for numbers, but i havent found a figure on how much the aftermarket diffs can take. Anyone know if the VR4 rear diff would be a good choice? i know of a couple that are 1000HP drag cars, but no info on their rear diffs, and im not on 3SI.org so i cant contact them. Help Please.

 

[Scott_S]

I believe shep is still on the stock rear diff and hes in the 7s so I dont think you need to worry about upgrading it

 

[gottalovenewage]

Driveshaft Shop doesnt seem to think that the stock rear diff will hold up. Ive asked Shep (or maybe one of his employees) about upgrading the rear before for a 600HP car and he seemed confidant that it would hold up. I guess I'll just have to e-mail him again to confirm it.

 

[Scott_S]

I would ask to see what shep is running and just do what he did because obviously it works.

 

[ericbev]

How many people do you know on here that have blown apart rear diffs? The x-fer case usually goes before the diff does. What kind of car are you planning on installing this on?

 

[toecutter]

4 bolts are pretty strong. It takes a whole lot to break those.

 

[gottalovenewage]

Its going in my 96 GSX, and i dont know alot of people running around with 800HP/700TQ so i dont know how much it can take for sure. Id rather overbuild it and not break it constantly, than underbuild it and break it all the time. So if i could find out how much it could take, then i could decide whether i need to beef it up or not for my application. I sent an e-mail to shep earlier, so i guess we'll see in a couple of days.

 

[gottalovenewage]

well no word from shep, so i made up my mind. thanks to those that helped.