75 h/o posi rear axle
April 8th, 2017, 07:09 PM
#1
Registered User
Thread Starter
Join Date: Jul 2009
Location: Birmingham,Alabama
Posts: 4,607
75 h/o posi rear axle
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
Thanks
Mike
April 8th, 2017, 07:52 PM
#3
Registered User
Thread Starter
Join Date: Jul 2009
Location: Birmingham,Alabama
Posts: 4,607
April 8th, 2017, 08:02 PM
#4
Registered User
Join Date: Sep 2011
Location: Battle Creek, Michigan
Posts: 2,236
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
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
April 8th, 2017, 08:13 PM
#5
Registered User
Thread Starter
Join Date: Jul 2009
Location: Birmingham,Alabama
Posts: 4,607
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
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
My pleasure
April 10th, 2017, 06:59 AM
#9
Registered User
Join Date: Jul 2006
Location: Richfield, Oh
Posts: 1,735
10 bolt 8.5
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
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
April 10th, 2017, 07:28 AM
#10
Registered User
Thread Starter
Join Date: Jul 2009
Location: Birmingham,Alabama
Posts: 4,607
Thanks
Mike
Thread
Thread Starter
Forum
Replies
Last Post
warrior71
Parts For Sale
1
February 28th, 2014 07:52 AM
507OLDS
Parts For Sale
0
April 2nd, 2013 11:18 AM
507OLDS
Parts For Sale
0
September 11th, 2011 07:37 PM
