Justin S
Truck Hoarder
Not exactly a GMT specific question, but its a fairly universal rear end figured I'd throw it out there. I have a Buick with an 8.5 10 bolt with 2.56 gears and i want to put in something like 4.10s. I already know to do this i need to swap the carrier due to the ratio change, and i know the GMTs come with the same 8.5s. My car has 28 spline axles and our trucks have 30. Im trying to do this on the cheap side, I don't want to spend $500+ on new parts. It would be pretty easy to find and snag a 4.10 carrier with ring and pinion from a truck in the junkyard, but is it just as easy as swapping over the spider gears between carriers so i can keep my 28 spline axles, or are they designed differently so that I can't do this?