I found this Auburn posi unit for my 99 silverado, but as it is I don't think it will fit my truck. I have read however that if you get the 99+ install kit that it will fit. Where can I find this kit so it will fit my truck?

 

So your telling us that it is an 8.5 right? If thats an 8.5 then all you need are the new bearing for the carrier. Thats what makes it an 8.6. I dont have the part numbers and more but im sure someone will post them up.

 

Yea it is an 8.5, 30 spline... but the seller said it only fit up to an 1998

 

 

contact Randy's Ring and Pinion (do a google search), their tech support should be able to confirm what you need and then push you to the sales people to get it for you

 

The only difference is the carrier bearings, go to Napa and look them up for your truck, they'll have them.