Rear end help!
#1
Rear end help!
I have a 72 Cutlass. Need info on this rear end. 8.2 or 8.5? Planning on putting a posi on it soon but my local shop charges me 1300. I think if i can figure out what i need and what i have, i can probably get it done cheaper. Any help would be appreciated!
Last edited by 72CUTTY; February 8th, 2012 at 06:46 PM.
#2
Just an Olds Guy
Join Date: Jul 2008
Location: Edmonton, AB. And "I am Can 'eh' jun - eh"
Posts: 24,525
Check with one of these guys
Monzaz = Jim Mitschke
J D Race & Restoration
Muscle Car Differential Specialists
Richfield, Oh
507OLDS
Brian Trick
Erie,PA
thetrickfamily@yahoo.com
814-440-3553
Both of them are specialists with rear suspensions and drives.
J D Race & Restoration
Muscle Car Differential Specialists
Richfield, Oh
507OLDS
Brian Trick
Erie,PA
thetrickfamily@yahoo.com
814-440-3553
Both of them are specialists with rear suspensions and drives.
#3
ID rear
1971 1972 Cutlass 8.5 10 bolt rear - Bolt in axles
A9 axle bearings with 712146 seals
28 spline axle shafts
SA 2.73 ratio NON POSI standard open rear one wheel peel.
Hope this helps. Jim
I have parts if you need a quote...Might save you some money on parts anyway. Jim
JD
A9 axle bearings with 712146 seals
28 spline axle shafts
SA 2.73 ratio NON POSI standard open rear one wheel peel.
Hope this helps. Jim
I have parts if you need a quote...Might save you some money on parts anyway. Jim
JD
#5
#9
I need help guys! So i ordered the package above from ebay. I messaged the guy and told him they were for a 72 cutlass with 8.5 rear end. He messages me back and ask me if im sure its an 8.5 and not an 8.2. So i tell him im sure its an 8.5 and gave him this info
1972 Cutlass 8.5 10 bolt rear - Bolt in axles A9 axle bearings with 712146 seals 28 spline axle shafts
Then he replies with this...
This is the correct package as long as you are 100% sure it is an 8.5. The pinion should have 30 splines. Thanks..
What do you guys think? Is it going to fit?
1972 Cutlass 8.5 10 bolt rear - Bolt in axles A9 axle bearings with 712146 seals 28 spline axle shafts
Then he replies with this...
This is the correct package as long as you are 100% sure it is an 8.5. The pinion should have 30 splines. Thanks..
What do you guys think? Is it going to fit?
#10
Just an Olds Guy
Join Date: Jul 2008
Location: Edmonton, AB. And "I am Can 'eh' jun - eh"
Posts: 24,525
I need help guys! So i ordered the package above from ebay. I messaged the guy and told him they were for a 72 cutlass with 8.5 rear end. He messages me back and ask me if im sure its an 8.5 and not an 8.2. So i tell him im sure its an 8.5 and gave him this info
1972 Cutlass 8.5 10 bolt rear - Bolt in axles A9 axle bearings with 712146 seals 28 spline axle shafts
Then he replies with this...
This is the correct package as long as you are 100% sure it is an 8.5. The pinion should have 30 splines. Thanks..
What do you guys think? Is it going to fit?
1972 Cutlass 8.5 10 bolt rear - Bolt in axles A9 axle bearings with 712146 seals 28 spline axle shafts
Then he replies with this...
This is the correct package as long as you are 100% sure it is an 8.5. The pinion should have 30 splines. Thanks..
What do you guys think? Is it going to fit?
I bought my posi from Jim. I have a 72 8.5 corporate 10 bolt. Axle splines are 28, pinion is 30, gears are 3:23
So yours should fit.
#12
Just an Olds Guy
Join Date: Jul 2008
Location: Edmonton, AB. And "I am Can 'eh' jun - eh"
Posts: 24,525
Looking for this to be done in the summer.
I'm going to be very happy with the 3:23's whether I like them or not! FWIW I did think about 3:08s and 3:42s. For what I want do do with the car though 3:23's are the answer. I'll use more gas, but so what? It's not like this is a daily driver. If it was I'd just keep the 2:73s on the posi.
#13
Well at least you're happy. I just parted out my 72, which I put a Chevy 12 bolt in with 3:73 which I pieced together back in the day. It was way to much for what I want today. Really debating between the 3:08's or 3:23's as a final ratio. Whether I use that rear end, or put a posi in the one in the car, it is at least a 12 bolt cover. I'll admit thought I still confused about the 8.2 and 8.5 inch and whether its an O rear end or corp. I need to take some pictures and send to the rear end guys. So I know what my options are.
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