well it's been three years since I changed my rear end oil. and the drain plug was tight. to tight broke many allens trying to get it out. finely got it. buying a new one. and my ? is the old plug was 3/16 allen does anyone know what size they went to. I have herd they went bigger but I can not find out how big.

 

Wish i could help you---i have the same problem with the tranny drain plug----sure would like to know what gorilla torqued the plug on mine.Broken/bent Allen keys as well and basically forgot about it now---i just drop the pan for service,than mess with it.DW

 

Next time coat the plug threads with a little bit of antiseize. Steel plugs in aluminum pans are Notorious for sticking. I have dealt with a few so bad it took heat and a large breaker bar. Impact allen head socket will work good if you can get to it with the impact gun.

 

I talked to mag-hytec today. the allen is still the same size 3/16. so no luck with a bigger one. I have thought about antiseize but I am worried about it getting in the diff and being abrasive to moving parts.

 

Had the same issue on my diff - started stripping the Allen socket. So heated mine very briefly with a torch - then let it cool. (Old mechanic's trick for stuck bolts). Came off very easily.

 

Nothing to worry about there! Anti seize is not abrasive.
And you only put a thin layer on the threads so none will be even close to getting in the diff.

 

^^^^^Exactly. Just put on a Max tow package diff cover. I saw no need for the extra fluid and cost.

 

I started using teflon tape on all pipe thread plugs, I got tired of having to really tighten them to get them to seal, the teflon tape means they don't have to be tightened as much plus it cuts out the dissimilar metal corrosion.