Brake wear
Thread Starter
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Freshman User
Joined: Oct 2003
Posts: 47
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From: Delhi, Ontario
Brake wear
I have a '92 F-150 SC, and the brakes have never performed well. I always get a shimmy from the fronts under any braking. The truck came with new rotors, pads and rebuilt calipers, and new front hoses. I thought it was just cheap warped rotors, but when I pulled them apart tonight and checked, the rotors are good. However, the pads are wore on an angle. On one end, they look new, the other is wore right down to nothing. The opposing side has the same wear on an angle. What causes this? I am going to put new pads on this weekend, but is there anything I am missing to fix this?
Post Fiend
Joined: Dec 2006
Posts: 9,111
Likes: 3
From: Lexington Mo
If you are getting vibration when braking you do have a warped rotor, and need to be machined.
Since you have pads wearing at an angle, you most likely have caliper hardwear that may be stuck. Make sure everything moves freely.
Bob
Since you have pads wearing at an angle, you most likely have caliper hardwear that may be stuck. Make sure everything moves freely.
Bob
Thread Starter
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Freshman User
Joined: Oct 2003
Posts: 47
Likes: 0
From: Delhi, Ontario
I held a straight edge against the rotor after removing the caliper, and I can see next to none warp. The keys were moving free and greased, and everything was moving free when assembled. Something I did hear that could cause this is wear in the slots where the keys go in. I did feel some wear in these slots.....could this be causing the uneven wear?
Elder User
Joined: Feb 2007
Posts: 829
Likes: 1
From: Goose Creek SC
I just read a post yesterday about brake pads wearing uneven and it being a caliper problem.......naturally I can't find it now to steer you to it.......but do a search for caliper and you'll find it.
Good Luck
Good Luck
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Postmaster
Joined: Jul 2006
Posts: 3,978
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From: Central PA
I your truck surges as applying brake your rotors are warped. You can put any strait edge on them you want and as soon as you put on machine and true up it will show up. I clean up new ones.(don't have them done at parts store they take too much off.) Remove calibers and clean all mounting/slide area as well as new pins. Check Em brake cables to see if not hanging up. This will cause rear brake not to work completely and wear front brake fast. Check rear brake adjustment often . don't rely on the adjusters to do it. I never have luck with them even . Good luck and keep us posted .when new.
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From: Fair Oaks, Ca
Senior User
Joined: Feb 2007
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From: Indianapolis
Using your parking brake helps the rear brakes adjust. Of course, almost all of us with AT's never use them. Keeping the rear brakes adjusted will reduce the wear and heat on the front brakes, and lessen the liklihood of rotor warpage.
Brand new rotors can come out of the box with enough warp to feel in your brake pedal, especially if they were stored wrong or dropped.
If a rotor is warped enough to see with a straightedge, the pulsating from the fronts will probably be bad enough to shake the fillings out of your teeth. .005"-.010" is enough to feel it at the pedal.
Brand new rotors can come out of the box with enough warp to feel in your brake pedal, especially if they were stored wrong or dropped.
If a rotor is warped enough to see with a straightedge, the pulsating from the fronts will probably be bad enough to shake the fillings out of your teeth. .005"-.010" is enough to feel it at the pedal.