Transmissions and Drivetrain Need help with your trans? Problems with your axle?

9-bolt bent axle??

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Old 02-16-2013, 04:52 PM
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Car: Base 91 'bird
Engine: 3.1 v6
Transmission: 4L60
Axle/Gears: 9-bolt 3.27 & PBR
9-bolt bent axle??

I got the carrier in and all set up right and the axles in. I test fitted a disk on one side and measured the run out at the outside edge with a dial gauge. 0.003 inches. Is that acceptable? The 1Le caliper is centered and parallel to within a few thou' as well.
When I tried the same disk on the other axle the run out was 0.110 inches. I'm not a mechanic but that seems like it's too much. Am I correct and the only likely reason is the axle is bent? If so can the axle be straightened or is it better to get a new one or at least a straight used one? If the latter does anyone have a straight PS axle for sale?
Old 02-16-2013, 05:05 PM
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: 9-bolt bent axle??

Yeah that's too much.

That'll have the tire tread wobbling by around 5 times that amount; a half-inch or so. Clearly .... unpleasant at speed.

Yes most likely it's because the axle is bent. Surprisingly common actually.
Old 02-16-2013, 07:07 PM
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Re: 9-bolt bent axle??

The .003 runout is all right, but .110 is way to omuch. That's going to cause a lot of problems with your brakes too. Check the runout on the axle flange without the disc and see what it is.
Old 02-16-2013, 07:19 PM
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Car: Base 91 'bird
Engine: 3.1 v6
Transmission: 4L60
Axle/Gears: 9-bolt 3.27 & PBR
Re: 9-bolt bent axle??

I did and it was appreciable too compared to the good one. Got to bite the bullet and buy another.
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