1994 K Blazer Locking Rear end

[MonzaRacer]

Well this isnt completely true as they do disentegrate and lock up. The best choice is find a reputable differential shop and have a new limited slip differential installed.
IF you actually take it out and put in an open rearend it can upset your ABS.
for the cash just install a new NON gove loc unit. TureTrac, Detroit Locker, Eaton, there are many different units out there that can be used and will work much better.
IF you want to retain the ability to lock it up but not use an LSD look into the Air Locker. Flip a switch and it works like a spool till you get out of slippery stuff, flip a switch and its off.
BUT this can some times mess with ABS. Found this out when I swapped a rearend out for a fella ,he brought in an open diff but same gears and then we had a nightmare trying to figure it out.
Since the "new" rearend was a rebuilt rearend we installed a Loc-Right set up and it took care of the ABS issues.
Good Luck
Lee