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GM 9 bolt rear end

 
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BigRay
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Joined: 05 Oct 2002
Posts: 25
Location: Topeka Kansas
532.42 points



PostPosted: Wed Oct 09, 2002 1:04 pm    Post subject: GM 9 bolt rear end Reply with quote

We had purchased a GM posi rear end for my son's 82 Z-28 from ebay. Not worried about being taken, due to price being very low.
It was listed as a 7.5 inch 2.77 ratio. We planned to replace the gear with a lower ratio. We also have build a 350 to place in the car. Approx horsepower about 370. But once we got the rear end. It wasn't exactly what we thought it was. It turns out to be a GM 9 bolt.
Tag on rear end is as follows... P/N 10046604 RATIO 2.77 ser # ????

Problem is i know next to nothing about this type of rear end.
I think it is what some people call an AUSSIE rear end, and it is some what stronger than a 7.5 10 bolt. But I'm kind of in the dark with it.

And to be completely honest, i'm not a typical Chevy man. I'm actually a Ford guy with a son that owns a 82 Z-28. Now to me a fast car is a thing of beauty. No matter if a bowtie or blue oval. But most all my ( in brain ) knowledge is to do with small block fords.

If any of you can supply me with info on this rear end I'll be very grateful
Thanks

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Our family vehicles, 1971 Mustang Conv. 1966 Mustang Coupe, built 302. 1982 Z-28 Camaro built 350.
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86GN
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Joined: 10 Jun 2002
Posts: 290

4042.20 points


1990 Chevrolet Corvette

PostPosted: Wed Oct 09, 2002 4:14 pm    Post subject: Reply with quote

It's got disc brakes on it ? It should have Borg-Warner cast in it somewhere. It should have a ring dia of 7.625" The axles use a retaining setup like a Ford 9". Bearings are retained by a press on ring at the end with a bolt on plate. The axles themselves are massive from the flange to the splines. The splines are the narrowest diameter of the axle. You should be able to get 3.27, 3.33, and 3.42 gears for it. Possibly 3.73. Getting parts can be a bitch. Make sure you deal with a vendor that specifically deals with rear ends. If you go to the local parts store, you won't get what you need. It should use a cone type limited slip. When that goes it wears out the ring carrier. That's one of the weak points. The ring and pinion is the other weakness. It was the strongest, readily available rearend put in 3rd gen F-bodies. There was a stronger one that was installed in some SLP stuff and I believe the Turbo TA's from '89, but that one is slipping my mind right now.
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BigRay
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Joined: 05 Oct 2002
Posts: 25
Location: Topeka Kansas
532.42 points



PostPosted: Thu Oct 17, 2002 6:52 pm    Post subject: 9 bolt rear end Reply with quote

86GN, I just wanted to thanks you for the help. I found a company that deals with 9 bolts rear ends. We now have a good idea of what we are doing..... Very Happy
We are going for a set of 3.45 gears and see if we can put stripes of our own in the street.
Thanks again

_________________
Our family vehicles, 1971 Mustang Conv. 1966 Mustang Coupe, built 302. 1982 Z-28 Camaro built 350.
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86GN
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Joined: 10 Jun 2002
Posts: 290

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1990 Chevrolet Corvette

PostPosted: Thu Oct 17, 2002 8:38 pm    Post subject: Reply with quote

Good luck with your project. Cool
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GTAracer
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Joined: 04 Dec 2002
Posts: 36
Location: Southeast, AL
416.22 points



PostPosted: Tue Dec 10, 2002 9:04 pm    Post subject: Reply with quote

Big Ray,

Could you please post the name of the company you found.

Thanks
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88 427 Camaro
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Joined: 25 Jan 2003
Posts: 1

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PostPosted: Sat Jan 25, 2003 1:16 am    Post subject: Reply with quote

Everything you need for 9 bolts is at www.9bolt.com

Miles
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