i ordered a set of 4.88 yukon gears from dunks performance out in washington.
i told mike that i have an 87 4cyl 4runner, i assumed that takes a 7.5" ring gear, but failed to specify as no other 87 truck (except a turbo) takes any different size of ring gear.

they arrive today, but they are 8" gears for a 4cyl (i assume for an 85 or older truck ). i called him up and he said that the 7.5 were only for 2wd trucks, and that id be all set with what i had.

so im kind of turned around-ive read that all differentials essentially take an 8" ring, but it all depends on pinion bearing distance and shims. it is covered in this:

http://www.pirate4x4.com/forum/showthread.php?t=228681&highlight=ring+gear+size+4runner

-so i was just wondering if anyone could confirm if i can use what i have or am i going to ups tomorrow to mail them back?

thanks in advance.