front end noise ,not wheel bearing. not constant. sounds like a rotation grind

Asked by Mar 27, 2017 at 10:30 AM about the 2001 Ford F-150 Lariat Crew Cab 4WD SB

Question type: General

12 Answers

74,635

Front brake pads worn out.

No. It is a deeper sound.Sounds like a slower rotation than wheel

74,635

Front of the engine? Idler pulleys or a water pump? Or is it when you turn the steering wheel...

not engine related. Only when moving. At 20 mph it grinds around 1-2 seconds intervals and speeds up when I go faster

74,635

Sounds like it is in the driveshaft. Have the u-joints checked.

IT IS NOT A SQUEAK, IT IS A GRIND

74,635

You know, it can only be so many things, just take it into a garage to be looked at or get under there and check it out.

i REPLACED THE WHEEL BEARING AND HAVE BEEN UNDER THERE, THOUGHT YOU COULD GIVE ME OTHER IDEAS

20,440

Could the rotors on the front be warped? Pickups are good for warped rotors if lugs are tightened in excess of specs. At highway speed, if you apply the brakes you can usually feel the pulsation of a warped rotor.

it is not the rotors, it sounds like a shaft bearing of some type. slow rotation compared to the speed of the wheels rotation, like it is geared down.

74,635

So is the transmission shifting properly?

20,440

What a shop would do is place the vehicle on a lift, let the engine run in 2WD drive and 4 WD and see if they can locate the problem with the wheels turning off the ground. They could probably locate the problem at idle with no weight on the suspension if drive line related.

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