Anyone know for sure what size allen wrench I need to remove the fill plug for the front diff? Mine is pretty rounded out, so I want to make sure I use the right tool as I may only have one chance to get it out. Thanks, Ron

 

5/16" allen

 

If youll get some valve grinding compound from the parts store it will make the allen wrench fit tighter.

 

warm it up a bit with a propane torch and it should snap loose a lot easier

 

8mm is about .003" bigger.

 

Thanks for all the help!