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| | | | Joined: Oct 2006 Posts: 122 Shop Shark | | Shop Shark Joined: Oct 2006 Posts: 122 | Anyone have insight on what would be a modern replacement for my existing 3100 rear axle? Not really concerned with ratio, as my drives are stop light to stop light for the most part on a 350 SBC/ 350TH | | | | | Joined: Feb 2006 Posts: 549 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 549 | Why not rebuild the old one? Just curious. | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | I don't understand why you want to change to a "modern" rear end if you don't need to change ratio's. What wheel bolt patern do you want to use. The Camero/firebird rears are good replacement but have 5 bolt small bolt paterns. The Blazer rear ends have the 6 hole paterns. Any thing you use will have to be modified to fit.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Oct 2006 Posts: 122 Shop Shark | | Shop Shark Joined: Oct 2006 Posts: 122 | I was thinking that rebuild cost might be in excess of what I can pick up a good used rear axle for, thus the question. No desire to change the bolt pattern, as I like the 6 lug design.
Any suggestions on what year Blazer will work? I am not looking to have to change and modify width, though i expect some changes to mounting might be required. Would be nice to find a posi or locker though...
| | | | | Joined: Feb 2006 Posts: 549 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 549 | I have a U bolt kit to sell if you make the swap. I had a locker from a blazer (late '80's) bought, but found it to be about an 1-1/4" too wide. The backing plates measured the same, but the drums were wider so I sold it.
Just an FYI, I ended up buying a 3.38 with a complete rebuild kit from Patricks. It was under $600.00. | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | ... but found it to be about an 1-1/4" too wide. The backing plates measured the same, but the drums were wider so I sold it. That only moves each wheel out 5/8", I can't see that as a deal breaker? Unless I'm missing something it sounds like a good swap to me. Grigg | | | | | Joined: Feb 2006 Posts: 549 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 549 | That only moves each wheel out 5/8", I can't see that as a deal breaker?
Unless I'm missing something it sounds like a good swap to me.
Grigg I load this truck a bit heavy on occasion and the tires would have rubbed. | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | You can buy a used center section reasonable & change it in a couple of hours.
The original rear end in those are about as stout as any out there.
Last edited by Wrenchbender Ret.; 07/18/2010 6:07 PM.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
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