Need help with a richmond ring & pinion...

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coolbmw
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Need help with a richmond ring & pinion...

Postby coolbmw » Wed Nov 25, 2009 9:59 am

Gear found in my late father's garage and has been there since at least 1985, new in box.

It has the following numbers, on the ring it says: 80-7325-1
the pinion says: 80-8325-1.

I cannot reference these numbers anywhere online, including the richmond web site. I do know it is a 4.10 ratio per teeth count with 29 spline count and 12 bolt on the ring.

I do know back then he had a 1974 olds 98 with the 455 engine.

The Question is: Does this belong in the 74 olds 98 and if not what is it from/what will it fit??

Any help is appreciated!
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BigBlockMan
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Re: Need help with a richmond ring & pinion...

Postby BigBlockMan » Wed Nov 25, 2009 4:04 pm

What is the outside and inside diameter of the ring? 74 Olds could have had 2 different 12 bolt rings, if that is what it is for...either 9.375 or 8.875...8.875 had 30 spliner pinion so I'm, guessing the 9.375 but I didn't think anybody made aftermarket gears for those. If they are for the 9.375 I'd be interested in buying them if you want to part with em.

coolbmw
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Re: Need help with a richmond ring & pinion...

Postby coolbmw » Wed Nov 25, 2009 4:27 pm

Definetly 29 spline count. Using a tape measurer, I get inside dia = 6 3/4 an doutside dia = 9 5/8.

That's assuming I would measure accross from the top of the teeth???

And this is stamped by Richmond.
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BigBlockMan
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Re: Need help with a richmond ring & pinion...

Postby BigBlockMan » Thu Nov 26, 2009 1:09 am

Actually yes and no...outside yes across the teeth, on the inside I measure where it meets the carrier..With the large outside diameter I'm thinking either 9.375 Olds or a 3/4 Ton pickup...If it's even GM..There is a possibility of a Dana, Chrysler, or Ford...all had rings around that size..best thing to do would be to call Richmond directly and quiz them about the stamped numbers.

coolbmw
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Re: Need help with a richmond ring & pinion...

Postby coolbmw » Thu Nov 26, 2009 8:19 am

Then I get 6 1/2 for the inside dia. Wouldn't that make it a 9.625", since outside dia is 9 5/8?

And your right, I will contact Richmond, they should know what was archived.

Thanks!
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monzaz
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Re: Need help with a richmond ring & pinion...

Postby monzaz » Thu Nov 26, 2009 6:48 pm

29 spline I bet it is a dana 60 with that size diameter... But what size bolt holes and are they reverse thread or common normal thread bolts.

Could be a drop out pontiac olds gasser rear gear set too.

How about some pictures? Jim
J D Race

coolbmw
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Re: Need help with a richmond ring & pinion...

Postby coolbmw » Tue Dec 01, 2009 7:35 pm

Yeah your right, after consulting with Richmond it is a Dana60.

Thanks for the help, guys!
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monzaz
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Re: Need help with a richmond ring & pinion...

Postby monzaz » Sat Dec 12, 2009 10:32 am

Thanks for comming to J D Race to let us help. You should be able to sell thise pretty well as a lot of people use the 4.10 Dana 60 for racing . Good luck, Jim
J D Race


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