I have an 8 3/4 w/ 2.76 gears in it and would like to make it a limited slip rear. I don't want to change gears yet as I like the highway gears. Has anyone should put in some sort of locker, like the Richmond PowerTrax that summit sells? Looks pretty straight forward for the install?

The newest issue of Car Craft (oct - 2012) has a cool article on mixing and matching parts from junkyard 8 3/4s, taking the best from all pigs and combining them into one to get thick tapered pinion, sure grip and 3.91 gears. They did it for less than $400.00.

it wasn't junkyard parts, it was swap meet parts.
they also got to that number figuring out selling the left over parts.

see if dr diff has the parts you need.

Sounds good, but I don't want to go playing under junk cars/ scrounging swap meets hoping to get decent parts. I don't have the tools to setting up gears. Nor do I have a press. I thought this was the easiest way to go and the price is just about the same as that article. I am wondering too how easy it would be to install something like this.

Wasn't trying to be a butt. I thought this might be a good alternative to build in your spare time, without any down time to your car until it was ready. Good Luck.

No offense taken, its all good...

powertrax can be iffy in quality, i know some have had good experiences with them and others have not. I did not have a good experience with them. My dakota slipped one of the their locking rings in the housings so that it would not anymore. That was before my 408 and no nitrous on the truck at the time. I have asked richmond several times what is the maximum horse power and torque these units could take and they would not answer. My truck at the time was making 300 rwhp and about 400 ft lbs torque..