What kind of rear diff and gear's your Blazer come with?
 

Just curious what kinda of rear diff and the gearing your Blazer came with? I just found out the code in the glove box the other day GT4=3.73's with G80=locking differential. I was pretty stoked when I found that out and kinda figuered I had some kind of limited slip

Sad. gt6 3.43

Yep gt6 3.43 no locker. On the hunt for a 3.43 with g80, but no luck on finding one from 4wd.

gu6 3.42 with g80. Tested my g80 in the driveway last night actually. Still worked. my tires are loosing tread though every time i test it. Hmm. LOL

I swapped my GU6 3.42 open diff for the ZR2 axle GT4 3.73 with a G80. I wanted the lower gears and the wider axle to go with my bigger tire setup.

GT4 with G80 that works when its convenient for itself lol!

Stock was GU6. Now it's K144 Toyota.

Stock GU6 3.42 with the G80, actually still locks up perfect!

Ive had GU6, non G80's in both my 4 doors...

I now have a Ford 8.8 lol

Ive got a factory gm 10 bolt with 4.11's and welded diff! so much better off road welded lol