1971 Olds 10 bolt

Axle_Foley
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1971 Olds 10 bolt

Postby Axle_Foley » Sat Mar 11, 2017 3:22 pm

I have what I thought was an 8.5 out of a '71 Cutlass but turned out to be an 8.2.....2.78 ratio

Can a 2.56 ratio 8.2 ring and pinion from a '67 A-body Pontiac be used in this Olds rear end? I know the bolts are smaller with the '67 ring gear but is everything else the same? (bearings,etc)

And was this type rear cover shown in the pic used only on the 71-72 Olds 8.5's or did it come on earlier 8.2's ('70 & older) that used the RW507C axle bearings?
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output.jpg

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monzaz
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Re: 1971 Olds 10 bolt

Postby monzaz » Sat Mar 11, 2017 5:23 pm

Wow, Yah We really need more pictures of other areas to be sure...BUT it you truly say it has a 14 39 ring and pinion tooth count it has to be 8.2 Pontiac or Olds etc.
Some one put that cover on ...BUT really that cover should only fit CHEVY rear diff bolt cover....
SO if you could we would like more pictures before anything if you can remover that cover and give us a inside shot I think we can really clear up what you have there. Jim
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Re: 1971 Olds 10 bolt

Postby monzaz » Sat Mar 11, 2017 5:26 pm

PLEASE SEND PICTURES OF THIS AREA THAT IS CIRCLE IN GREEN ALSO.
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8.5 OR 8.2 gm REAR ID REAR BETTER PICTURES IN THESE AREAS.jpg
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Axle_Foley
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Re: 1971 Olds 10 bolt

Postby Axle_Foley » Sat Mar 11, 2017 6:31 pm

I'll get pics asap...

What do those green areas you have circled signify?

The cover is similar to a chevy 12 bolt cover but the rib is shorter on this cover......runs from 12 o'clock to 3.

I just saw a couple of pics of this cover online on another forum and it was said to be a Olds corporate 8.5.

Here is one pic:
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rearend_8.5.jpg

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monzaz
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Re: 1971 Olds 10 bolt

Postby monzaz » Sun Mar 12, 2017 11:31 am

Better picture. You have a 10 bolt 8.5 corperate rear. (OLDSMOBILE) Buick looks like the traditional 10 bolt 8.5 with the casting ears.

You have a 10 bolt 8.5 pictured. Good luck. Jim

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monzaz
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Re: 1971 Olds 10 bolt

Postby monzaz » Sun Mar 12, 2017 11:33 am

here are your 2 example pictures of the 10 bolt 8.5 avaialble in the 1971- 1972 era and even into the 1973-1976 era A-body Buick Olds And Pontiac.
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olds cutlas 10 bolt 8.5 id.jpg
8.5 COVER BULGE AND CHASSIS HOSE MOUNT POINT.JPG
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Axle_Foley
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Re: 1971 Olds 10 bolt

Postby Axle_Foley » Sun Mar 12, 2017 6:09 pm

Thanks for the help.

I got some misinformation before and it definitely is 8.5 not 8.2

Casting #407296
Ratio code: SA

Tried to post a few pics but I get error message sayin too large.
I plan to sell this any suggestions as to it's value? It's a 2.73 open and everything appears to be in great shape. Was quiet as could be the guy I got it from told me and by looking at it I have no reason to doubt. It spins smooth and tight.

One more question:
Can a BR9 bearing be used with the BOP 8.5 such as this and the 8.2 instead of the SET9/A9?

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monzaz
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Re: 1971 Olds 10 bolt

Postby monzaz » Mon Mar 13, 2017 12:10 am

It appears that br9 is the same as set9 and a9... just a skf number...I will check into that closer.
set9 or a9 bearing only.

Selling- your only selling a core. We would buy it from you if you were with in closer driving distance... But amount will be determined by the person wanting it. we buy them for 100.00 open non posi

could get as much as 250.00 to the right person wanting a solid core to build a stout 10 bolt
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Re: 1971 Olds 10 bolt

Postby Axle_Foley » Mon Mar 13, 2017 8:10 am

BR9 appears to be a one piece straight roller type bearing and not a tapered cup like the A9. The BR9 looks like the original bearing that is on this 8.5 I have....
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br9.jpg

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monzaz
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Re: 1971 Olds 10 bolt

Postby monzaz » Mon Mar 13, 2017 9:27 am

Appears to be OLD STOCK. What was the name brand on the box? I am pretty sure no one is making them like that anymore. We have been looking for years and some times we get lucky and find some old stock boxed into new name brand boxes...lol. It happens and we like when it happens. :)
Another give away as to old stock is the bearing is made in the USA. :)
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Re: 1971 Olds 10 bolt

Postby Axle_Foley » Mon Mar 13, 2017 12:27 pm

CR Industries

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monzaz
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Re: 1971 Olds 10 bolt

Postby monzaz » Mon Mar 13, 2017 9:49 pm

? where are they out of.. .as stated might be old stock? Have the box?
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Axle_Foley
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Re: 1971 Olds 10 bolt

Postby Axle_Foley » Thu Mar 16, 2017 8:24 am

No longer have the box but I remember it was a green CR box.

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Re: 1971 Olds 10 bolt

Postby monzaz » Thu Mar 16, 2017 11:27 am

YES... OLD STOCK...gOOD BEARINGS. :) jIM
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