Hi guys, I am new to your forum. I do not have an oldsmobile... I do however build GM Muscle Car rear differentials at J D Race and Restoration in Richfield,Oh. I have been answer questions on the driveline section of your forum for a cuople of weeks. I am not a spammer ...lol

. I Just wanted to let you all know that I am just here to try to help iron out any questions you might have on GM rear differentials and others too if needed. I am not here to insult anyone and will take every question seriously, even questions considered common knowledge to most people on this site. I have had many A-body 1965-1972 GM cars over the years and still have my one plus other f-body and h body cars. I am GM through and through. I can tell you I know my 1965-1972 GM Diffs inside and out plus others. No one knows everything and I am always humble enough to learn what might be new to me also. If I do not know the answer - I will not make something up... I will either find the answer or plain and straight tell you I DO NOT KNOW.
I hope this helps understand who I am and why I am answering your questions. If you all deside I do not belong then just let your head Olds man know and he will do what is necessary to clean up the site.
I am a helping hand in the confusing world of diffs. I care and can help you find some hard to find differential gears and parts also. Good luck on all your restorations and part hounding. Thanks, Jim Mitschke