I am in the process of restoring my 87 iroc and I had someone take the 9 bolt out of the car and clean it up and he took off rear cover and he found a bolt that was chewed up and broken into 3 pieces.The bolt came out of the carrier case,its the smaller bolt,i believe a 7/16 head.So far everything looks okay,no damage on the ring gear,gonna tear it apart.Where can I get these bolts from,does anybody carry them?Thanks

 

They are right hand thread, fine thread, not sure of the pitch. You can take a good one to someplace like Sears hardware and match it up with a thread gauge, then find a grade 8 replacement. UNLESS you are talking about the ring gear bolts (around the outside) then try ringpinion.com (Randy's ring & pinion).

 

Randy's Ring & Pinion has them. I had to get a set several years ago. You can also get them from another differential. I have an old 2 series differential with a 2.77 gear on it that might make a good donor.

 

Thanks guys,i will check into finding the bolt,it is a 8 mm head and thread is 1.25 fine,i just found out that the bolt had snapped off inside the thread.So I'm gonna have to get it out,i don't understand how this happened,is this a common problem?