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You have to jack the vehicle off the ground, then grab each tire at the 12:00 and 6:00 positions. Then as hard as you can try to wiggle the tire up and down. If there is any movement then that wheel bearing needs to be replaced.
Hi Donald:
First basic questions
- Tire pressure correct?
- Tire condition?
- When does this happen? Cornering? - shock setup?
- Load?
- Speed?
Any info you can give will help to find the problem.
If you reply as a comment to this post I'll receive it.
Cheers.
You probably have a bad tire or wheel bearing. Either the tire is cupped causing humming noise or grease inside sealed wheel bearing is burnt up. I would take front tire and move to the back of the car. Then drive again. If noise stays the same you probably have a bad wheel bearing. If noise moves to the back of the car than you may need to replace the tire. Most likely it is the wheel bearing, I replace them all the time at my shop
Check the following:
Steering head bearings for play and looseness
Front and rear tire pressures
Front and rear wheel bearings for wear
Rear fork bearings
Also check over tires for irregular wear patterns that might be contributing to the loose feeling.
Check the "U-Joints" on the drive shaft and or rear wheel/axle bearings.
You MAY need a little help as the wheel(s) needs to be of the ground to check axle bearing. Grasp top and bottom of the tire and wobble it in and out.
Posible problems , listed from cheapest to most expensive.
Tires out of ballance
Broken chord in a tire
Bent rim
Loose ( worn ) tie rod ends
Bent axle
Wheel bearings ( but not likely)
If you have the tools , and a good safe flat driveway , jack up 1 corner of the car , spin the tire by hand and watch if it spins true , or wobles. while your at it , firmly grab the tire , and try to wiggle it side to side , in and out , back and forth. Repeat process for each wheel. If everything seems ok , I would think about getting tires ballanced. Probly about $ 12 each.
General observation is that if you feel the shake in the steering wheel , front tires are the problem , If you feel it on your bottom , rear tires. Good luck with that.
If you want to skip the whole jacking up the car proceedure , go directly to the wheel ballancing , and ask the mechanic to keep an eye out for "wheel out of true" while they spin on the ballancer.
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