Braineack

iTrader: (62)

count the teeth on the ring, count the teeth on the pinion....divide.

I didn't rebuild mine, but mine also has one hellofva preload, and it pretty much always locked

you can buy all the parts from mazdaperformance if you do....

TwoScoopsofHooah

iTrader: (2)

most of them were 4.10

timhill78

iTrader: (3)

I did the install last weekend. Man, that things heavy. It's a 4.1. So I keep the same ratio.

karter74

iTrader: (4)

Well, you could have opened it up, used dial calipers and measured the thickness of the friction plates and discs. You would have known how worn out it was. I did this on one that had about 120k miles on it, found it had almost NO wear on it. I didn't add any shims to up the preload, didn't need it to wear out any quicker and it locks up just fine as it is. BTW, I only paid $75 for mine!

timhill78

iTrader: (3)

Didn't measure the wear but it grips up great. Paid $110 shipped across the country.

Braineack

iTrader: (62)

make looked good so it was ok with me, didn't want to open it up. So once installed I tested the preload. One tire on the ground, turning the hub with a troque wrench it took 190lbs. to get it to slip.