widz

iTrader: (1)

so i thought it'd be time to change my diff oil so i try to take out the fill plug...it was so hard to turn it that i stripped the bolt...i then have an extension welded to the bolt so i can try again...but it turns out that the fill plug is either cross threaded or the PO used locktite to permanently lock up the fill plug (I DONT KNOW WHY)...so i broke the bolt loose and it will turn...but it will stop turning at a point so i cant take the fill plug out...WTF CAN I DO....i really dont want to replace this lsd just becuz i cant take the fill plug out...its a 1985 gsl-se

3rd and final 7

iTrader: (9)

well if its locktite you can just add heat it up to loosen the locktite if its cross threaded im not too sure

widz

iTrader: (1)

aww damn thats what i was afraid of...im pretty sure its cross threaded...anyone?

workinprogress80

once you get the plug out just try to find a tap big enough to rethread the hole and get a new plug

widz

iTrader: (1)

but that still leaves the big question..how do i get it out -_-'...lol thanks guys

rotaryPOWAH

Depending how permanent it is, it may be possible to drill a hole through it big enough to break the threads off from the inside of the hole. I can't think of any "gentle-er" options.

bo0557

iTrader: (1)

how much would it cost the rebuild a gsle lsd centre?

LongDuck

First question - is it leaking?

If you can get it to seal correctly without risk of it coming out, then do so.

From that point - get to work on removing the 'FILL' plug about 3/4 of the way up the diff housing and see if you can get that one out. If so, you can get a vacuum pump at your auto parts store (used for changing oil on ATV's and equipment), and suck the gear oil out through the fill hole. Re-filling of gear oil follows standard procedure. Don't forget the LSD-specific additive that you MUST put in with the gear oil - I think it's a GM part number in a little bottle.

Yeah, I know it's inconvenient, and not the way it was designed, but don't ruin a diff housing if you can avoid it. You only change gear oil in your LSD diff about every 10+ years, maybe more. HTH,

widz

iTrader: (1)

The drain plug is fine...im talking about the fill plug

mjm4jc

Man, that is a real bummer! I would still try to get it out by heating up the area around the plug, and then using a ratchet with a cheater bar and slowly start to turn----back and forth. I think the fill plug and drain plug are the same, so take out the drain plug and make sure that you have a tap for re-tapping the fill plug hole if you get it out.

Rotor13B

Uh yeah, Don't take out the drain plug until your sure you can get the fill plug out. This is a basic cardinal rule, Lest you want to have an additional problem of not being able to put new diff fluid in.