E30 Zone

I started today to take the driveshaft off the diff so i can remove the whole diff for a new one. Taken every allen bolt out of the drive shaft then gets to the last one. Its that corroded that its stripped as soon as i tried to turn it. What other way can i go about removing it??? I was close to just cutting the head of with a grinder. Any advise will help cheers

Also take 4 17mm bolts off the propshaft but thread sticking through, can you just pry it so it moves back?? or can i wiggle the diff out when everything is undone?? Thanks

When you say stripped do you mean the thread or the hex?

Yeh the thread in the hex. If i cut the head off i might wiggle the diff out. But i rather try getting it off the right way

Weld a nut onto it. Next time try this....

give the head of the bolt a few whacks with a hammer with a socket over it, turn it to tighten a little, then reverse and try to remove. Worked for me on an abs sensor Allen bolt, and it was smaller.

Use lots of wd40 or equivalent also.

I cant weld to save my life, i can cut the head off coz the diff is fooked. i wacked it in but looks like previous person damaged the thread. Ill have to just get it out