Wheel wobble - Team Camaro Tech
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post #1 of 10 (permalink) Old Jan 11th, 10, 04:30 PM Thread Starter
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Kip
 
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Location: Tulsa, Ok
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Wheel wobble

After months of wrenching on brakes, suspension, rearend... today was the day to fire the ol girl up and make sure everything worked... Keep in mind, that I have never actually driven the car... I had the the rear of the car on jackstands, started the car and put it into gear... to break in the new gears (per instructions). So as I am sitting there watching the wheels spin... I notice that both rear wheels have a subtle "wobble". I dont think it is an axel issue because the axles are new.
Are cast aluminum wheels dimensionally "true"? These wheels are old school Centerlines that are soon to find a new home on Craigslist... I guess I am just wanting second opinions on the what could be the source of the wobble...
Thanks,
Kip
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post #2 of 10 (permalink) Old Jan 11th, 10, 06:53 PM
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Re: Wheel wobble

Are the wheels balanced yet?

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post #3 of 10 (permalink) Old Jan 11th, 10, 06:59 PM
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Re: Wheel wobble

You should have near zero runout. I'd pull the wheels and put a dial indicator on the disks. Make sure the tool is perpendicular to the face of the disk, being at an angle will screw up the reading.

runout should be .007 or less.





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post #4 of 10 (permalink) Old Jan 11th, 10, 07:10 PM
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Al
 
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Re: Wheel wobble

Rear disc brakes? If so - make sure that the rotors fit over the axle. If not, you'll have to have the OD of the axles machined down a bit.


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post #5 of 10 (permalink) Old Jan 12th, 10, 01:08 AM Thread Starter
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Re: Wheel wobble

discs fit perfect on the axel.... im gonna put the steel spare on one side today to see what happens....
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post #6 of 10 (permalink) Old Jan 12th, 10, 04:31 AM
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Re: Wheel wobble

I had similar issues, you need to check both the rim and the tire. I had all my rims and tires checked on a spin balancer while I watched to solve a vibration issue. turns out 1 rim was bent and a tire was out of round (different wheels). Solved it by putting the bad tire on the bad rim and using that for the spare.

Kevin


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post #7 of 10 (permalink) Old Jan 12th, 10, 12:09 PM Thread Starter
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Re: Wheel wobble

I think I found the culprit... i double checked the fitment between the rotor hat and the axle hub.... to find that I should have triple checked it before..... So out come the axles..... $*&^%##
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post #8 of 10 (permalink) Old Jan 12th, 10, 12:41 PM
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Re: Wheel wobble

So what was wrong????? We need to avoid the same problem.

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post #9 of 10 (permalink) Old Jan 12th, 10, 12:51 PM
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Re: Wheel wobble

Quote:
Originally Posted by Fred Ficarra View Post
So what was wrong????? We need to avoid the same problem.
Sounds like the rotors didn't quite clear the axles, and he needs to machine the OD of the axle flanges a bit so they slip on all of the way. Not uncommon on a rear disc swap, esp with some aftermarket axles. Sometimes it can just be that the rotors need a chamfer on the back side of the register hole.


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post #10 of 10 (permalink) Old Jan 12th, 10, 02:47 PM Thread Starter
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Re: Wheel wobble

YEP.... rotors didnt fit all the way down onto the axle... I checked (not closely enough) when the parts arrived... but since all the new parts came at once... I was like a kid in a candy store... (or playboy mansion) ... and I just was too eager.... !!! So instead of taking that first drive, I get to take apart my freshly assembled 12 bolt.... so much for the inaugural drive tomorrow....
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