4th gen f-body rear end

[Slow Ride]

Well my brother called me and told me he knocked 3 teeth off the ring gear in the diff in his '98 Z28 convertible. It has a bone stock LS1 and 6 speed. This comes after a complete rebuild late last summer at Automatic Rebuilders and another complete rebuild about 9 months before that. I've read these rears are weak, but this is getting rediculous.

What are some options to make the damn thing last? He is a normal 24 year old guy, but the tires are skinny Blizzaks and blew the gear set on a pretty standard 2-3 shift. He had already stuck over $1200 in the damn POS.

HELP!!!

[Firebird454]

He needs a 9" or a 12 bolt.The factory rear will hold up better with an auto,but the 6 speeds just tear them up.

[Chad Montgomery]

Moser makes a killer 9inch or 12bolt for the 4th gen but they are pricey.

[Wicked]

I'd just take it easy on teh launches on the street and at the track, maybe buy some slippery tires for the rear.

The 7.5's are weak, but maybe a girdle and a proper install with the correct backlash setting will help this to last longer.

Some shops use a dial indicator to set pinion depth and mesh, but I have always done it by feel and a grease marker on the teeth. The few times that I have set them up with a dial indicator, they make noise.. screw it.