clearwaters88

Hi Guys, My ML has developed a hum/whine that has now become more of a metal on metal frictional noise, it seems to me like a wheel bearing or possible a CV joint or something in the drive line, it stays pretty consistent and doesn't change with intensity with engine/tranny rpm, it is there even when I put it in neutral and just let it roll, so it's not engine or tranny related.

Is there a way to check wheel bearings on an AWD vehicle by just jacking up one wheel at a time?

Are there any bearings or joints that you think it could be? Possible some that go more frequently then others?

Any help will be much appreciated!
Thanks
Shalil

Maj. Dundee

[QUOTE=clearwaters88;5567022]
Is there a way to check wheel bearings on an AWD vehicle by just jacking up one wheel at a time?

/QUOTE]

No not really. You will have to get the truck up on an alignment rack with all 4 wheels supported.

iankayem

Unlikely to be CV joints, they show up as a clicking noise when you increase steering lock.

But it could be wheel bearings or diff bearings. A four wheel lift as suggested is the best way to test.

PTE

This should help . It is about a 4 hour job. You can get a Lemford replacement part on E-Bay for about $100.00
http://www.benzworld.org/forums/w163...g-support.html

http://www.benzworld.org/forums/w163...g-support.html

Please listen to the U-tube Video

Cheers _PTEngineering