Members Login
Username 
 
Password 
    Remember Me  
Post Info TOPIC: 1967 differential and rear axle question


Veteran Member

Status: Offline
Posts: 25
Date:
1967 differential and rear axle question


Having a noisy issue on both wheels and will have to prevent damages. I have a 1967 Bonneville Superior ambulance, the differential is 10 bolts. I found one used and rebuilt 3 hours south and the seller is pretty unclear on measurements. He said the differential is from a 1966 GTO and told me "59 inches hub to hub". Since it's hard to get a 6 hour drive for correct measurements I want to know if a 1966 10 bolts differential from a GTO is compatible with a 1967 10 bolts Bonneville.


Attachments
__________________


A Poncho Legend!

Status: Offline
Posts: 49275
Date:

You are talking about the complete rear axle assembly, housing etc? If so, they are not interchangeable.

__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)



Veteran Member

Status: Offline
Posts: 25
Date:

Called the seller since he was unclear about how to measure, his 59 inches center wheel/center wheel I have 64 on my ambulance so I think this noisy bearing problem sounds like a rebuilt... ouch



__________________


Poncho Master!

Status: Offline
Posts: 2241
Date:

If it is real noisy it is best to pull the axle and replace the bearing.... 

I suspect the axle shaft will be chewed up also requiring the seals and shaft.

Might be able to get the axles with the bearing, and seal installed.

That was what I had to do on my Impala.

 

Search Classic Industries...   Sale ends today  FREE SHIPPING.

Probably cost similar to used by the time you pay shipping.

Cliff



__________________

Cliff

Done Hurryin

Like the larger type for my eyes. 

 

 



Poncho Master!

Status: Offline
Posts: 1723
Date:

I would say it probably needs new rear wheel bearings by your description that both rear wheels are noisy. The bearings should be a pressed fit on the axle and probably not that expensive. It would certainly be a lot easier to replace the wheel bearings than the entire rear axle assembly.

Paul

__________________


Addicted!

Status: Offline
Posts: 309
Date:

I have two rear diff's for my Beaumont. One 12 and the other is a 10 bolt.

The measurement to determine width is taken from inside of brake flange on the axle tube to the inside on the opposite side and they are the same width for both 10 and 12 Bolts.

That measurement is 54 "  , I just measured the 10 bolt to be sure.

What makes the difference with these particular years especially in the A body cars is the location of the upper bushing mounts on the differentials.  The are 1/2" further back as compared to the 68 and newer ones. 

Good luck 

Dale 

 



-- Edited by silver steak on Sunday 18th of June 2023 07:57:18 AM

__________________

New Brunswick , 1950 Pontiac Silver Streak 2 Dr Sedan, 1967 Beaumont, 1985 Sierra 1500 One Owner



Canadian Poncho Superstar!

Status: Offline
Posts: 5479
Date:

If you are buying a used diff, it may not be much better than what you have. Youll go through a lot of pain and expense to find out? May be much better off pulling your axles and bearings and replacing what needs replacing.

__________________

63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC.
1963- Pontiac top selling car in Canada

Mahone Bay, NS Still not old enough to need an automatic



Canadian Poncho Superstar!

Status: Offline
Posts: 5479
Date:

Check rockauto for parts bonneville vs GTO? To see whats the same for bearings and axles?

__________________

63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC.
1963- Pontiac top selling car in Canada

Mahone Bay, NS Still not old enough to need an automatic



Canadian Poncho Superstar!

Status: Offline
Posts: 7565
Date:

If the diff for your 67 Bonneville is anything like a 70 Bonneville, it's completely different than one from a GTO. While the cover might have 10 bolts on the cover, the B-Body (Bonneville, Catalina) diff is physically much larger than the A-body (LeMans, Tempest, GTO) diff. And I'm not just talking brake drum to brake drum measurement.

__________________
70 2+2 convertible
70 2+2 hardtop
70 Parisienne hardtop
72 GMC Sierra

 

 



Guru

Status: Offline
Posts: 644
Date:

You have an Eaton 8 7/8 rear end. 65 to 70 full size American Pontiac. Bearings and seals are available. I can get you numbers if you need them. I have spare axles from a 66 Bonneville and a 65 Catalina if your axles are damaged. These diffs are not the same as Chevrolet and not the same as A body GTOs

__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.

Tweet this page Post to Digg Post to Del.icio.us
.
Support Canadian Poncho!
Select Amount:
<
.
.
.