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Old 10-31-2011, 08:42 PM
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12 bolt Rear end?

I've got a new motor thats been dyno'd at 630hp that I'm about to put in the car. It is backed by a well built turbo 400 with a 3,500 stall. I have a stock 12 bolt with an eaton posi and 410 gears in the car right now. My question is will this rear end hold up for awhile until I can come up with the money to change the axle's and put in some c-clip eliminators. It will be mostly driven on the weekends here and there, but it will hit the strip every now and then. The strip is what I'm a little worried about, but I wasn't sure what a stock rear axles/housing was rated at. Thanks for your replies!

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Old 11-01-2011, 03:59 AM
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I'm not sure about stock ratings either but, they're not rated for that.
Slicks & a sticky track would kill it.

You could upgrade to a 33-spline Yukon DuraGrip Posi & Axles, Solid Pinion Spacer and a Girdle style Diff Cover.
Ford style Housing ends would be much better than the C-clip Eliminators for street/strip use. The C-clip Elims tend to leak.
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Old 11-01-2011, 08:12 PM
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Quote:
Originally Posted by SSedan64
I'm not sure about stock ratings either but, they're not rated for that.
Slicks & a sticky track would kill it.

You could upgrade to a 33-spline Yukon DuraGrip Posi & Axles, Solid Pinion Spacer and a Girdle style Diff Cover.
Ford style Housing ends would be much better than the C-clip Eliminators for street/strip use. The C-clip Elims tend to leak.
The 630hp is at the flywheel. I'm not sure what it's gonna be at the wheels until I dyno the motor with it in the car. It's still probably gonna be a little much. I've spent so much on this car already. Do you think it would hold up if I went with the 30 spline strange axles kept my eaton posi unit, and put in the ford style housing ends along with changing the yoke, rear main caps to something stronger? along with getting the solid pinion spacer and girdle style cover. I've already got an aftermarket driveshaft that I had made from the local shop.

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Old 11-02-2011, 10:10 AM
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It depends on how much abuse it sees, may last forever.
It's worth a try, if something breaks you can upgrade later. At least with the Ford Ends you wont have to worry about leaks or losing an Axle.
With all those upgrades it will definitely be much stronger than Stock.
Many weld the Axle tubes to the Center Section but, with the Chevelle's 4-Link suspension, twisting them really isn't a problem like with a Leaf Spring setup.
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Old 11-04-2011, 03:55 PM
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I recall a 10-bolt pulling the front wheels of a camaro off the ground. I would think with an automatic that provided you preload the rear prior to launch, it will hold up just fine.
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Old 11-04-2011, 08:39 PM
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Quote:
Originally Posted by schovil69
I recall a 10-bolt pulling the front wheels of a camaro off the ground. I would think with an automatic that provided you preload the rear prior to launch, it will hold up just fine.
I believe it will be fine. I'm probably going to play around town like it is. I'm low on funds after everything I've done to it, but before I take it to the track I'll probably up-grade a few things(When I get more money that is) Hopefully it will hold up until then. It may hold ok at the strip like it is. I just repaired the rear quarter after a bad blow out. I would sure hate to dive off in the panel again.
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