rear diff questions?
#1
rear diff questions?
I found a website that lists all the RPO codes and after I went threw all the codes I know my blazer has the 3.42 gears.( not the ones I was hoping for) I still have no idea what size it is. Whether it is a 7.5 or 8.5 rear any info on how to tell would be great
#10
The only way to get the 8.5 10 bolt in a 4 door Blazer is an axle swap from a ZR2. If you go this route, it's pretty easy to do the rear axle. I did mine in about 2 hours by myself in the driveway. Swaping the front diff to keep matching gears is a lot more painful, but possible to do with normal hand tools. My truck came with 3.42 gears too, and I swapped in a ZR2 axle to get the 3.73 gears, wider stance, and the G80 locker.