: Looking for 77-96 Fleetwood/Deville/B-Body axle?



N0DIH
04-25-07, 09:57 PM
I am looking for a 77-96 B/D car axle, must be 8.5", prefer 2.93-3.73 ratio. Might do a 2.56 if needed.

My axle is going off to shop to be rebuilt but I need to keep car on the road. Mine is getting pretty darn noisy with those worn out axle shafts.

Got one for sale cheap or loan for a couple weeks??

Thanks!

turbocaddy
05-05-07, 04:39 PM
77-79 is a different axle...the bolt pattern is smaller...the 80 and up are 5 on 5 bolt circle..

N0DIH
05-05-07, 06:44 PM
77-79 axles interchange also. It is just using the leftover parts from the 71-76 B/C/D car run in the Cadillac lineup and some Chevys. It is the slightly smaller ring gear version of the Type "P" axle, aka, Pontiac axle. Good one, but no perf parts at all for them, posi's are rare and few between and coveted by all who find one.... But are cone type and aren't good for performance use. 3.23 was best ratio ever made for it.

Either way, I did get an axle, $75 for a 1980-1983 9C1 axle, 3.08's and posi. Once I get mine repaired I will pull this one out and it will be up for sale, a great upgrade for any 77-96 car that doesn't need ABS, but needs posi and 3.08's (being most Cads got lethargic 2.56's to 2.93's, this is a help)

bicentennialcadillac
05-05-07, 10:11 PM
Once I get mine repaired I will pull this one out and it will be up for sale, a great upgrade for any 77-96 car that doesn't need ABS, but needs posi and 3.08's (being most Cads got lethargic 2.56's to 2.93's, this is a help)

I may be interested when the time comes. Just bump the thread when you're ready to unload it.

N0DIH
05-05-07, 10:57 PM
Will do. It is a 9C1 axle (or whatever a cop car was in 1980 or 1983), 3.08's and posi. Posi is pretty tight, axle is nice and quiet. I am quite happy with it and would keep it in if I didn't want ABS and TC back.

Bushings are in great shape too, being a 9C1 car, possible they are a little firmer.

Also likely up for sale would be the HD rear sway bar, lower arms for the bar (needs new inserts through, the old ones were rusted, they might be able to be resused, but I don't know if I kept them), and the tow package rear springs (FE2 suspension).

Do you have a 8.875/8.75 axle now? If so, double check the u-joint, you might need the 8.5" axle u-joint in the driveshaft.

still_walkin
05-06-07, 04:58 AM
try ebay for the part

N0DIH
05-06-07, 07:13 AM
For what part??


try ebay for the part

deVille33
05-13-07, 09:45 PM
You can get new axles from Morrison's, for about 150.00. In 1977 - 79 the gear ratios you were citing were available in the Chevrolet line. The baskets would fit the Cadillac housing, but not sure if the housing would fit under a Cadillac body. Have tried to exchange a Pontiac rear to replace my rear with disc brakes in my '77 Brougham, and they woundn't interchange.

N0DIH
05-13-07, 10:20 PM
What axle did you try to change from/to? What didn't work?

I would expect the driveshaft to possibly be wrong length or u-joint to be off a little, but all else should be the same.

Now you might have some issues with the disc to drum/drum to disc in the older cars, as they used to have a residual pressure valve keeping some pressure in the drum brakes (as they had springs pulling the shoes back they could). With discs this would keep the brake applied slightly.

The 8.5" is the Chevy designed "Buffalo" gear axle, which is the 77-96 B/D car std axle. The 71-76 B/C/D bodies (8.875") and 77-84 (8.75") D Body (Fleetwoods only IIRC) cars had the Pontiac "P" axle. I detailed these pretty well some years back with all possible gear ratios and some other details on this forum.

I just put a 80 Chevy cop car axle in my 94 Fleetwood, works well, fit perfectly.