Bad Hub ??? [pics included]

[345s-bspinnin]

I have a vibration at 70-75mph that seems to emanate from the rear. It vibrates regardless of engine load, RPM, or transmission gear. There isn't any discernible play on any of the wheels (wheels off ground). I pulled off the rear wheels/brakes to inspect the hubs and found what appears to be separation (shiny section???).

03' Gen III with stock rear diff, axles, etc. Opinions?


Rear Left:
http://i1227.photobucket.com/albums/ee424/345s-bspinnin/IMG_20140526_150456_159_zpsf5def422.jpg (http://s1227.photobucket.com/user/345s-bspinnin/media/IMG_20140526_150456_159_zpsf5def422.jpg.html)

Rear Right :
http://i1227.photobucket.com/albums/ee424/345s-bspinnin/IMG_20140526_150517_321_zps92320a92.jpg (http://s1227.photobucket.com/user/345s-bspinnin/media/IMG_20140526_150517_321_zps92320a92.jpg.html)

[bluesrt]

I have never seen a hub cause a vibration, and I have seen a lot of bad hubs- go for a bad tire or u-joint

[Roller]

I would say it's the hub/wheel bearing. If you disconnect the half shaft and rotate the wheel you should be able to feel it or use a stethoscope and hear it.

Frank

[FrgMstr]

It's a damn shame you never drove the car 345s! :dude3:

Seriously, let us know what you find so I can check the next time I am tech'ing the car.

[Tiago]

I would suspect a bad tire first... could also be DS out of balance for reasons unknown..

[345s-bspinnin]

I have never seen a hub cause a vibration, and I have seen a lot of bad hubs- go for a bad tire or u-joint

Swapped out race wheels/tires for my road racing wheel/tires and the vibration is present at exactly the same speed. As for the U-joint, the vibration is present whether I am in gear or not. Feeling the vibration while coasting down with car in neutral eliminates u-joint from equation right?




I would suspect a bad tire first... could also be DS out of balance for reasons unknown..

I have done some 5500rpm drops at the 1/4 mile on DRs. I am thinking the drive shaft or half shaft could have yielded and/or lost balance.



Any takers on why I have that nice "new" looking thin line on my hub (second pic) ?

[Mr White]

I'm a bit new to viper suspensions, so I apologize if this sounds a bit odd, but is there no chance any of the bushings in the rear are shot or your alignment is a bit gooched?

[bluesrt]

alighnments do not cause vibrations, unless its off about 45 degrees... lol-

[PaulP]

how many miles on you car?

[bluesrt]

I



<<<<<<<<<<<<<<<<<<<<<<<<Any takers on why I have that nice "new" looking thin line on my hub (second pic) ?[/QUOTE]>>>>>>>>>>>>>>>>>>>>>>>>>>

(((((((((((((((((((((((((((((((((((((((((((((((((( (((((((((((((((


maybe the 5500 rpm drops on the drag raceing prolly did that)))))))))))))))))))))))))))))))))))))))))))))

[345s-bspinnin]

I

<<<<<<<<<<<<<<<<<<<<<<<<Any takers on why I have that nice "new" looking thin line on my hub (second pic) ?>>>>>>>>>>>>>>>>>>>>>>>>>>

(((((((((((((((((((((((((((((((((((((((((((((((((( (((((maybe the 5500 rpm drops on the drag raceing prolly did that)))))))))))))))))))))))))))))))))))))))))))))[/QUOTE]

Did what?

[bluesrt]

did you say that you did some 5500 rpm drops? or did I read that wrong?

[345s-bspinnin]

UPDATE:

Finally got around the replacing the hub on the rear right. Went with the OEM Timken piece and took a couple of hours to swap out. Despite the shiny "wear" you see in the picture above, there was never any discernible play on the hub, but it now rides smooth and vibrations free :D

Keep in mind that I did have two off-track excursions awhile back. Relatively minor into the grass (no walls or anything) but apparently these things don't like lateral loads. These minor issues (i.e. my vibration) showed up a few thousand miles later.

[schulmann]

Bad hub : make sharp turns and listen to the noise.

[FrgMstr]

UPDATE:

Finally got around the replacing the hub on the rear right. Went with the OEM Timken piece and took a couple of hours to swap out. Despite the shiny "wear" you see in the picture above, there was never any discernible play on the hub, but it now rides smooth and vibrations free :D

Keep in mind that I did have two off-track excursions awhile back. Relatively minor into the grass (no walls or anything) but apparently these things don't like lateral loads. These minor issues (i.e. my vibration) showed up a few thousand miles later.


Thanks brother. See you at the Mile this weekend? Looks like there might be plenty of time to drink beer...

[345s-bspinnin]

Bad hub : make sharp turns and listen to the noise.

No noise/whine/crunch. I even installed the OEM exhaust to quiet it down and still never heard a peep. Once removed, it was still quiet on the bench. Then again, there isn't any load in that case.



Thanks brother. See you at the Mile this weekend? Looks like there might be plenty of time to drink beer...

I did see that the weather isn't very favorable for you guys. I have a commitment and won't be able to make it this weekend. Have a safe and fun weekend. I expect strong numbers from you on this round.

[FLATOUT]

Glad you got her fixed!

[AZTVR]

Keep in mind that I did have two off-track excursions awhile back. Relatively minor into the grass (no walls or anything) but apparently these things don't like lateral loads. These minor issues (i.e. my vibration) showed up a few thousand miles later.

I very much doubt that you damaged a bearing due to a traverse through the grass, even sideways. The bearings are spheres and the races are the opposite. They should not be affected differently by lateral loads as long as the hub nut is torqued adequately.

[345s-bspinnin]

I very much doubt that you damaged a bearing due to a traverse through the grass, even sideways. The bearings are spheres and the races are the opposite. They should not be affected differently by lateral loads as long as the hub nut is torqued adequately.

The hub nuts were torqued adequately from the factory. I had to freaking stand (200 lbs) on a 2-ft breaker bar to remove them.

I am still curious about that "clean" line which could have been the start of a hub separation. I still have the hub and may take it apart to see if I can find any spalling.

[Back In Black]

The hub nuts were torqued adequately from the factory. I had to freaking stand (200 lbs) on a 2-ft breaker bar to remove them.

I am still curious about that "clean" line which could have been the start of a hub separation. I still have the hub and may take it apart to see if I can find any spalling.

If you grabbed the tire and tried to rock it side to side and top to bottom and didn't get any movement, then the hub was not starting to separate. I have no explanation for the shiny line other than your off track excursion may have caused some piece of debris to get trapped there long enough to make the line. I had some play in one of my rear hubs but did not have the line like yours.

I've seen a front hub so severely worn and loose that it fell apart in my hand but not until I removed the stub shaft nut.