Can't figure out squeal
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Can't figure out squeal
2001 F150 7700 5.4 automatic 4x4 regular cab long bed bi-fuel 152,000 miles.
I have a squeal I can't find. It sounds like a brake squeal the wear indicators make but doesn't seem to be that. I have pulled all four wheels and looked at all the pads and removed the rear rotors and checked the park brake shoes. All look to have over 3/4 material.
The squeal seems to be when truck is warm, but not when starting out cold. It goes away when speed goes under 10 mpg, and I don't notice it at highway speeds. I have taken it out of gear and sped engine up which doesn't effect sound, as a bad belt would. Sound is only made when warmed up, moving over 10 mph, regardless of engine speed and whether in drive or neutral. The four wheel drive system seems to be working well.
When I roll down the window and listen, it sounds like it's related to the wheel rotation. I am not getting any pulse during braking that a warped rotor causes.The rotors all looked to be in good shape, with only slight grooving. It's embarrassing to drive
Any suggestions?
Thanks in advance!
Max Blair
Kaysville, Utah
I have a squeal I can't find. It sounds like a brake squeal the wear indicators make but doesn't seem to be that. I have pulled all four wheels and looked at all the pads and removed the rear rotors and checked the park brake shoes. All look to have over 3/4 material.
The squeal seems to be when truck is warm, but not when starting out cold. It goes away when speed goes under 10 mpg, and I don't notice it at highway speeds. I have taken it out of gear and sped engine up which doesn't effect sound, as a bad belt would. Sound is only made when warmed up, moving over 10 mph, regardless of engine speed and whether in drive or neutral. The four wheel drive system seems to be working well.
When I roll down the window and listen, it sounds like it's related to the wheel rotation. I am not getting any pulse during braking that a warped rotor causes.The rotors all looked to be in good shape, with only slight grooving. It's embarrassing to drive
Any suggestions?
Thanks in advance!
Max Blair
Kaysville, Utah
Fleet Mechanic
Joined: Nov 2000
Posts: 1,713
Likes: 2
From: In my House
Is your truck lifted at all in the front? I have seen guys say that there cv joint boots cause the rubbing noise. I for one, had a rubbing noise that sounded like a rubber on metal sound. What I did to daignose it was spray a bit of wd-40 into the back side of the outter CV joint boot. Right where the boot enters the wheel bearing, and it stopped the noise. After that all I did was loosen my spindle nut and slid back the cv joint a bit and cleaned off the surface where the boot meets the bearing and its been fine for about 5k. Odd I know, but it worked for me
Rich
Rich
