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10-17-2018, 06:44 PM | #1 |
Registered User
Join Date: Nov 2011
Location: Palm Coast, FL
Posts: 125
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Rear end ID
Double-checking the ID on my rear end after removing the driveshaft. Back side looks like a typical 8.5 10-bolt GM, but the driveshaft side is less certain, no U-bolts, no "straps," just four 7/16" bolts. Any help ID'd this is appreciated.
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10-17-2018, 10:55 PM | #2 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: Rear end ID
I see the ears on top of the center section for the upper suspension arms used in passenger cars. I'm going to guess that your wheel stud pattern is 5 x 4.75? The pinion flange looks to be designed for a CV joint.
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10-17-2018, 11:06 PM | #3 |
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Location: Palm Coast, FL
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Re: Rear end ID
Bolt pattern is 5x5. The flange doesn't match up with anything I've found online or in shop manuals. I'm swapping out my 350TH transmission for a 4-speed, and I'm planning on reusing the driveshaft, so it doesn't matter all that much, but I'd love to know what it is!
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10-18-2018, 07:14 AM | #4 |
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Join Date: Jan 2011
Location: Hayes Va
Posts: 4,569
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Re: Rear end ID
Looks like may be Oldsmobile. They had a 12 bolt (ring gear bolts) with a 10 bolt rear cover that used a flange like that. Looked at a C20 last year with a 455 in it and it had the Olds rear in it, It was 5 on 5. Had that flange with a 3" thick spacer in it to make the drive shaft work.
Jimmy
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10-18-2018, 10:08 AM | #5 |
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Location: Palm Coast, FL
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Re: Rear end ID
Thanks. Swapping in a beefed-up Saginaw 4-speed, so the measurements should stay the same.
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10-18-2018, 10:28 AM | #6 |
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Join Date: Aug 2009
Location: Bowser
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Re: Rear end ID
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10-18-2018, 12:35 PM | #7 |
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Join Date: Nov 2011
Location: Palm Coast, FL
Posts: 125
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Re: Rear end ID
2.84. Rebuilt by someone I know, so I'm keeping my fingers crossed. I know the warnings about Saginaws not being able to handle much, but I'm not going to be doing any drag racing!
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10-18-2018, 12:44 PM | #8 |
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Join Date: Aug 2009
Location: Bowser
Posts: 13,522
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Re: Rear end ID
As long as you don’t sidestep the clutch pedal and treat it nice it’ll last.
I ran a 3.11 gear one behind an L34 396 and an LS6 454 for awhile. |
10-18-2018, 12:47 PM | #9 |
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Join Date: Nov 2011
Location: Palm Coast, FL
Posts: 125
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Re: Rear end ID
That's encouraging! I'm running a 400SBC.
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