Differential swapping

dhoopty · 04-14-2008, 06:04 PM

Hello, I am new to the board, but have owned Olds A bodies for about 15 yrs. My question is, will the rear axle from a B body (Delta 88) fit the A bodies (Cutlass)? I have found a decent deal on one and would like to pick it up if useable. Thanks!

Dapapadon · 04-14-2008, 08:42 PM

No, the B body rears are wider and the mounts are located wrong. The Jetstar 88's are a no also. Center section is the same, but it's wider and the lower mounts are out too far.

What year is your Cutlass?

Don

dhoopty · 04-15-2008, 06:19 PM

Oh well...yeah I was kinda thinking it was just gonna be pure luck if it fit - I have a 70 Cutlass S that I am working on now. Just sold a 70 442 HT and finished up my 68 442 convertible last summer. I love that car! I am the 2nd owner of it...all numbers matching. Its a 4spd with rallye pac and 3.91 posi.

As for the Delta rear...guess Ill leave it in the car and just see if someone is interested in purchasing the car.....

Thanks for the reply Don -
Chris

Dapapadon · 04-15-2008, 07:18 PM

Hi Chris. Welcome to the site! You might post on the "Parts Wanted" board. Someone may have a rearend that will fit. Including your location will make it easier. You could post the Delta also. Even if it's a parts car. Someone may be interested.

You might also post us a few pictures of your cars. We love pictures!! The 68 sounds sweet! That year is one of my favorites. A 4 speed, convertible 422 - Ya gotta' show us!

I think you'll like it around here. Post over on the "Introductions" thread if you get a chance.

Don

Run to Rund · 04-16-2008, 09:45 AM

It is hard to find a rear in decent shape for a 35+/- year old car. You can search around, or check realoldspower member 507olds who specializes in GM diffs (Brian Trick), or go with a new reproduction strong replacement rear. The last will run you about $2000 when you are done, most likely. You can check www.quickperformance.com for 9" ford bolt in rears and also a vendor of Moser who makes repro 12 bolts. A lot depends on what you plan to do. what ratio, etc. A stick car with slicks needs a lot stronger setup than an auto with street tires, etc.

04-14-2008, 06:04 PM	#1 (permalink)
dhoopty Junior Member Join Date: Apr 2008 Location: VA Posts: 5	Differential swapping Hello, I am new to the board, but have owned Olds A bodies for about 15 yrs. My question is, will the rear axle from a B body (Delta 88) fit the A bodies (Cutlass)? I have found a decent deal on one and would like to pick it up if useable. Thanks!

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04-14-2008, 08:42 PM	#2 (permalink)
Dapapadon Senior Member Join Date: Jan 2007 Location: Portland, OR Posts: 218	No, the B body rears are wider and the mounts are located wrong. The Jetstar 88's are a no also. Center section is the same, but it's wider and the lower mounts are out too far. What year is your Cutlass? Don

04-15-2008, 06:19 PM	#3 (permalink)
dhoopty Junior Member Join Date: Apr 2008 Location: VA Posts: 5	Oh well...yeah I was kinda thinking it was just gonna be pure luck if it fit - I have a 70 Cutlass S that I am working on now. Just sold a 70 442 HT and finished up my 68 442 convertible last summer. I love that car! I am the 2nd owner of it...all numbers matching. Its a 4spd with rallye pac and 3.91 posi. As for the Delta rear...guess Ill leave it in the car and just see if someone is interested in purchasing the car..... Thanks for the reply Don - Chris

04-15-2008, 07:18 PM	#4 (permalink)
Dapapadon Senior Member Join Date: Jan 2007 Location: Portland, OR Posts: 218	Hi Chris. Welcome to the site! You might post on the "Parts Wanted" board. Someone may have a rearend that will fit. Including your location will make it easier. You could post the Delta also. Even if it's a parts car. Someone may be interested. You might also post us a few pictures of your cars. We love pictures!! The 68 sounds sweet! That year is one of my favorites. A 4 speed, convertible 422 - Ya gotta' show us! I think you'll like it around here. Post over on the "Introductions" thread if you get a chance. Don

04-16-2008, 09:45 AM	#5 (permalink)
Run to Rund Senior Member Join Date: Mar 2008 Posts: 80	It is hard to find a rear in decent shape for a 35+/- year old car. You can search around, or check realoldspower member 507olds who specializes in GM diffs (Brian Trick), or go with a new reproduction strong replacement rear. The last will run you about $2000 when you are done, most likely. You can check www.quickperformance.com for 9" ford bolt in rears and also a vendor of Moser who makes repro 12 bolts. A lot depends on what you plan to do. what ratio, etc. A stick car with slicks needs a lot stronger setup than an auto with street tires, etc.