Re: Question on 68-72 Olds type "O" Rear
 

Hi Danny,
Not going to do anything that cannot be undone easily. Like Joe H. mentioned better than looking at it in the garage. lol. I really think it appreciates being run hard with hi octane.

Regards,

Fred

Re: Question on 68-72 Olds type "O" Rear
 

Beautiful car Fred--------Go for it , just smear vasoline all over EVERYTHING behind the rear wheels :)

Re: Question on 68-72 Olds type "O" Rear
 

I want to see that 13,000 mile car!

Re: Question on 68-72 Olds type "O" Rear
 

Not a bad idea....probably go into the trailer easier too.

Re: Question on 68-72 Olds type "O" Rear
 

Might help you get out of the car when its in the trailer. LOL.

Seriously, a lot of the pro stock guys spray PAM in the wheel wells and lower quarters so cleanup is easier.

Re: Question on 68-72 Olds type "O" Rear
 

It's been awhile since worked on any of those rears,I was trying to remember but not sure but I think you could put 12 bolt unit in those rears if I remember correctly.
Mike Taylor 3601

Re: Question on 68-72 Olds type "O" Rear
 

I don't think a 12 bolt posi will go in. Olds used the same posi from 3.42 to 5.00 ratio.

Re: Question on 68-72 Olds type "O" Rear
 

No, unfortunately you can't put a 12-bolt Chevy carrier in an Olds housing. Funny thing is, although the "O" type had a 12-bolt cover, the carrier used 10 bolts to retain the ring gear. I wish I had a nickel for every time someone told me they threw one of those out years ago. An "O" type rear with positraction can go for pretty good money nowadays. Richmond does offer new 3.42 and 3.91 gears for the "O" type if anyone needs 'em.

Re: Question on 68-72 Olds type "O" Rear
 

Thanks for the verification Jim.....we found this when we pulled the cover off. I thought the same for years.Found a 4:33 set in OKLA.

Re: Question on 68-72 Olds type "O" Rear
 

so what is one worth ?
i got one dissassembled with a new 3.90 gear ?
just wondering

captain jack