Ok i have a 91 blazer with i believe is the 10 bolt, it is limited slip. I blew it tonight playing around, im definite its the spider gears as i can spin one wheel by hand and the driveshaft moves, but the other wheel sits still. I flushed it out as soon as i got the truck and the fluid looked realy clean, i heard something when i got it about the rear recently beeing rebuilt... but it doesnt matter cus its broke now. Anyway, i have to fix it tomorrow before my mom finds out (been working on cars for a total of 5 years so im capable) But im curious... That military blazer i mentioned earlier tonight, what axle is it most likely to have in it?? And will it bolt right up. There are other blazers up there that i could use for the rear but if the military one has the same lug pattern and pinion so i can use my driveshaft as is i would like to grab that. So should i take the military one?? Understand this all has to bolt up because im doing it in a wallmart parking lot (the swap) and pulling the rear out of the junkyard truck in the mud. Or should i just take the tag off mine and match it up. If the 10 bolt breaks as easily as it did tonight i dont want another... its junk! But needless to say, i have to show up at my house tomorrow afternoon with a running truck... or a damn good explination of how i blew up my rear that doesnt involve tresspassing.