I just picked up a 75 H/O posi rear axle. I assume it's a 8.5. What ratio are these normally? Where is the axle code located? Are these desirable and what price do they bring? I also have the lower rear control arms and the sway bar. Thanks for any info provided.

Thanks

Mike

 

Hey Mike, those aren't worth squat. Tell you what, give me $20 and I will haul that away for you.


Brett

 

Yep,I figured as much. Just my luck buying something I know nothing about.

 

Actually

DIFFERENTIAL
Seen as a quick fix to fuel mileage issues, ultra-high rear gears were the fashion of the day in the mid- to late 1970s. Thus, the Hurst/Olds rear axle came standard with 2.56 gears and could be optioned up only to 2.73 or 3.08 gears, with or without the Anti-Spin limited-slip differential. Look on the front side of the right axle tube for a six-digit code; the first letter of that code will indicate whether it's an open (code A) or limited-slip (code C) differential, while the second will indicate the gear ratio (H for 2.56, C for 2.73, and D for 3.08).

Hope this helps Ya.

As far as value, its all in the need of the buyer.

Regards, Brett

 

Thanks big guy.

 

My pleasure

 

My neighbor had a '75 HO W-25 and it as equipped with a 2.56 limited slip rear.

 

This axle came from a W30 if that makes a difference.

 

You can up grade that rear to be very strong...10 bolt 8.5 corp rears are great.
MANY many parts and you can get any gear ratio under the sun. 2.24 - 5.57

Posis true trac eaton auburn detroit locker power trax full spool

J D RAce

 

Yes,I love the 8.5 corporate rear axles. IMHO they are as good if not better than as 12 bolt Chebby. I'm not going to use it,I needed to identify it so I can market it.

Thanks

Mike

 

Brett,
Thanks for the info. I did not know the mid '70s codes.

 

Curses Scott, i need to keep you like a mushroom when it comes to the 73-77's...in the Dark!!

Brett

 

Good info for all of us. Thanks guys.