Rubbing/grinding sound under load
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Rubbing/grinding sound under load
Hi All,
Just bought a 2000 Expy a month ago, though I am certainly no stranger to Fords. It is a 4x4 with the 5.4 motor, 3.55 gears and 118K miles.
I hear a rubbing/grinding sound when going slowly (20mph) up a rather steep hill near my house. It is not steady, but oscillates almost as if it is with the wheel rotation. It feels as if it is coming from right under my feet.
I also feel the same rubbing/grinding sensation at freeway speeds when throttling up a hill to hold my speed.
The sensation goes away in both situations when I the off the throttle. And it does it in 2wd mode. I confess that it didn't occur to me to test it in 4wd mode until just now.
Any experience/advice with this noise? Thanks to all.
Jack
Hangtown, CA
Just bought a 2000 Expy a month ago, though I am certainly no stranger to Fords. It is a 4x4 with the 5.4 motor, 3.55 gears and 118K miles.
I hear a rubbing/grinding sound when going slowly (20mph) up a rather steep hill near my house. It is not steady, but oscillates almost as if it is with the wheel rotation. It feels as if it is coming from right under my feet.
I also feel the same rubbing/grinding sensation at freeway speeds when throttling up a hill to hold my speed.
The sensation goes away in both situations when I the off the throttle. And it does it in 2wd mode. I confess that it didn't occur to me to test it in 4wd mode until just now.
Any experience/advice with this noise? Thanks to all.
Jack
Hangtown, CA
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2000 Explorer 4wd
It has a **** on the dash that says AWD/4Hi/4Lo, so yeah I assumed incorrectly it was a 2wd setting. The AWD then, is a computer-controlled 2wd/AWD situation???
What I don't get about it, with respect to my earlier question about the drive shaft turning is that I can definitely tell the difference between the AWD and the 4wd setting. So I assumed the driveshaft was not engaged in the AWD mode.
Anyway, I will check for driveshaft clearances.
What I don't get about it, with respect to my earlier question about the drive shaft turning is that I can definitely tell the difference between the AWD and the 4wd setting. So I assumed the driveshaft was not engaged in the AWD mode.
Anyway, I will check for driveshaft clearances.
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Joined: Jan 2001
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From: Central NYS
When in 4WD the transfer case clutch is engaged and the front and rear DSs try to turn together. (That's what causes the drive train to 'bind up' if you try to turn on a hard surface.
) When in AWD (All Wheel Drive) the transfer case clutch is disengaged (which allows you to turn easily on hard surfaces), until the computer detects that the front and rear driveshafts are turning at different speeds. The computer then engages the transfer case clutch which locks the front and rear driveshafts together.
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From: Billings, Montana
The front DS always turns with the front wheels. (In other words, there is no "lock-out" on the front hubs.)
When in 4WD the transfer case clutch is engaged and the front and rear DSs try to turn together. (That's what causes the drive train to 'bind up' if you try to turn on a hard surface. )
When in AWD (All Wheel Drive) the transfer case clutch is disengaged (which allows you to turn easily on hard surfaces), until the computer detects that the front and rear driveshafts are turning at different speeds. The computer then engages the transfer case clutch which locks the front and rear driveshafts together.
When in 4WD the transfer case clutch is engaged and the front and rear DSs try to turn together. (That's what causes the drive train to 'bind up' if you try to turn on a hard surface.
) When in AWD (All Wheel Drive) the transfer case clutch is disengaged (which allows you to turn easily on hard surfaces), until the computer detects that the front and rear driveshafts are turning at different speeds. The computer then engages the transfer case clutch which locks the front and rear driveshafts together.
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I had a similar problem with my 1999 f150, ended up being the rear axles were worn out. So much so they had to use a crow bar and force the axles past the warn part where the bearings wore a 1/8 " groove.
I cannot say for sure that would be your problem, but a 6000 ish GVW on my f150 and carrying it at 5500 lbs for only 75,000 miles really burned me on buying another f150.
Especially when the dealer mechanic told me that the rear axle was the same as the Mustang axle. 
I cannot say for sure that would be your problem, but a 6000 ish GVW on my f150 and carrying it at 5500 lbs for only 75,000 miles really burned me on buying another f150.
Especially when the dealer mechanic told me that the rear axle was the same as the Mustang axle.
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