I'm building a blow through 5.3 LM7 in my 85 IROC. I have a brand new Richmond 4.10 gear for it because I was gonna go with an old school 383. But I'm needing to go with a higher gear to be able to build boost. My car has a stock 3.42 gear and I was wondering how it would hold up?

 

May hold all you can throw at it. May break on the street on first pull. Cant tell

My personal 10 bolt stock gears has held 800 hp and mid 9 sec et's. others break on stock ls1 cars... Automatic trans help soften the load but theres still only so much it can take

 

This is gonna be a street car. Not gonna take it to the track very often.

 

It should be ok

 

That's what I was thinking but I just don't wanna take a chance in messing up my locker or something. I could handle getting a different ring and pinion if it goes out.

 

See alot of ring failures but sometimes the carrier can crack. Launches tend to hurt much more than acceleration while already moving