What tool do you guys use to open up the rear diff drain plug?

 

a breaker bar the size of the plug.

 

you can use a 3/8 drive wrachet to open it or a 3/8 drive extension to open it the wratchet is the esyest one.

 

i use a 3/8 drive breaker bar and insert the 3/8 "chuck" into the drain plug and giver it hell. a lot of times though i used a cheater pipe on the end of the breaker bar for leverage. you may need it. as a tip, make sure you can remove the fill plug first before draining the differential.

 

yep just the square end of a 3/8 tool

 

Ok, thanks a lot...

 

3/8 breaker bar and some leg leverage!