Front End grinding noise- please help!

[daman_30135]

I just recently purchased a used 2000 GMC Jimmy SLE front end drive and at high speeds on the interstate(anywhere from 60+mph) it shakes a little. Also just recently it started to whenever i have to stop really fast and hit the brakes hard, the front end shakes really bad and makes a grinding noise. Also occassionally, not always, when i am at a stop and start to accelerate after a few seconds it makes a grinding noise. I dont think its the transmission because it doesn't always do it and never slips and i really dont think its the enginer because its only in the initial stages of acceleration if it even happens at all. Any help would be really appreciated!

[rlith]

Immediately pull your wheels. Check for grooved rotors and uneven brake pads. Check your ball joints and your hub bearings. One of those is going out.

[daman_30135]

thanks a bunch for the help, i guess i will check it out when i get home, any idea how expensive it is to replace bearings or hubs?

[rlith]

The hub/bearing is 1 unit, they are about 120.00 a piece

[daman_30135]

I got home and took off the tires and the rotors look fine- the drivers side calliper would shake a little when pushed against- prior to taking off the front wheels, while they were still completely bolted on, i grabbed the top and bottom of the wheels and shook the tire. the tire had some give in it and would shake some- both the drivers side and passenger side did this, is this normal? if not what causes it?

[rlith]

Since both sides of the rotor are smooth yet you could shake the wheel, then it's the hub bearings... You need to replace the hub.