almost no hub for the wheel to center on

[WSSix]

I've been chasing down a vibration that has be plaguing my car for a while now. I swear it didn't come in until after I changed my rear end out. Well, one area that has concerned me is the axles have almost no hub for the wheel adapters and thus wheels to center on. I'm afraid I don't have my rear wheels centered and that's causing the vibrations. Currently, the adapters are centered by me tightening each lug down evenly and attemp to center the wheels.

Here's what I have for a centering hub. 1/8th total protrution but only 1/16th is flat. The rest is the chamfer.



Think this is enough for me to get new adapters made that have less of a chamfer on them and fit tight enough to what's there to be centered? I really don't want to get new wheels. That's not in the budget now.

I've had the wheels balanced on a road force machine. Pinion angles are -2 on the transmission and +1 on the rear end. Going higher on the rear didn't change anything. Having the rear lower didn't either. Vibration comes in right about 60 to 65 mph and doesn't change with RPM only speed, and it doesn't change much as I go faster either. Only thing else I can think to check is the driveshaft.

Suggestions beyond the topic at hand?

Thanks

[glassman]

Driveshaft angle, axle shaft, and tires, leading culprits. But that hub does look like it could be "not seating", that would deff cause it.

[randy]

my rear looks like that. Is there a screw in the middle to switch the end out?

[WSSix]

No screw in the end, Randy. That's a centering hole used during machining of the axles. I've thought about making it a threaded hole so I can add an extension to the hub to help center a wheel. Not sure if necessary or possible though.

Axles are brand new custom Mosers, Mike. Driveshaft angles are almost zero. Maybe 1/2 a degree at most.

Thanks!

[dhutton]

Are your adapters hubcentric with the same bore as the hub? I would have thought the 1/16" would be enough.

Don

[WSSix]

They were when I had the original rear end in the car. However, I also had a lot more of a hub to align the adapters too. That's why I'm thinking of getting new adapters. I just wasn't sure if anyone had an opinion on whether there was enough of a hub to align to. I'm going to check with the company that made my adapters originally and see as well.

Thanks

[craig510]

1/16" should be plenty to align with, however, most wheel adapters will have more than a 1/16" chamfer (and all wheels I have seen do) so they will not center. I really dislike lug centric anything.

I have machined several sets of spacers and a set of hub centric rings custom to my applications. If you can work with your machinist so they know to leave the inside corner practically sharp you should be in good shape.

This is my current hub centric ring that also centers up my rotor.



This is a set for my first set of wheels.

[WSSix]

Thanks, Craig. I was planning to have the new adapters machined in that manner. I need to call that company that did them the first time.