So i'm going to be running 33's on my 2001 chevy blazer, i currently have 3.42 gears and i want to go to 4.10 gears. I found the parts i need for the rear, but i'm having trouble finding parts for the front differential. I'm not sure what size ring and pinion i need for the front. I've been told the front is 8.25" but i have reason to believe it's 7.25". I just need some confirmation and some help finding the right parts and installation kit.

 

When I got my mechanic to order a rebuild kit for my front zr2 diff, it was a 7.25... that had the 3.73 gears.

I will assume that the 3.43(currently in my 4door) gears has the same size diff... thats to what I can tell without taking a measuring tape to it...

 

Consider running 4.56 gears instead of 4.10s. The 4.10s work ok with a V8 and 33" tires, but 4.56 is much better with an underpowered V6.