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I seem to have an intermittent drag on my left front brake. I noticed yesterday during braking that it was pulling hard to the left, got home and checked rotors with thermometer gun and the left front was about 100 degrees warmer than the rest. This morning everything was fine until about 20 minutes into the drive and it started pulling to the left when braking again. Got to the office though and the left front was cool and matched the others. The pins were cleaned and re-greased a few months ago. Pads and everything looked good at that time but the rotor may have a slight warp.
Any thoughts on what could cause it to be intermittent? Should I just replace the caliper? It is probably 3 years old. Clean and re-grease again and replace or resurface the rotor with new pads?
It only pulls to the left during braking, not at all driving.
Sounds like your right side front brake may not be working due to stuck caliper pistons?
That's why it probably pulls to left when breaking.
I just went through this two weeks ago with my e99 (RF sticking pistons)
Rebuilt NAPA calipers lasted 8 years, but taking it apart and little bit of cleaning and new piston seals corrected it 100%
Here is a good thread started by 87crewdually few years ago:
I guess they have been dragging for a bit. Inside pad was quite a bit thinner. I decided to replace caliper, rotor, and pads. The caliper wasnt too bad but one of the pistons didnt retract as easily as the other.
Got the whole system flushed with new fluid, went for my test drive last night and the right one was dragging. This morning it was fine. Will replace it, too.
I got about 3 years out of my last left front one too before it started dragging. Now pulls a little to the left on a hard application so the passenger side must not be working quite as well but it's still going for now. Reman calipers are a real crapshoot it seems like. I've had rears that didn't even last two years but they get a lot more road grime and spray.
I guess they have been dragging for a bit. Inside pad was quite a bit thinner. I decided to replace caliper, rotor, and pads. The caliper wasnt too bad but one of the pistons didnt retract as easily as the other.
Got the whole system flushed with new fluid, went for my test drive last night and the right one was dragging. This morning it was fine. Will replace it, too.
Good idea. Once the friction material is thinner than the backing plate it's a good rule of thumb to get rid of them.
Pads on the same caliper should wear reasonably similar. Once you are witnessing one pad wearing faster than the other, it's a strong indication that the caliper pins are sticking and the caliper is not properly sliding side-to-side.
This is a common problem with super duties that tend to sit.
When doing brake work, you should remove the sliding pins, clean out their bores carefully, clean off the pins of any corrosion, and use a good waterproof high-temp grease.
When I checked everything out the pins were all moving freely. I think one of the pistons on the left side wasn't fully retracting. The right side, I'm not sure about because everything looked fine but the pads were worn similarly. I went ahead and replaced both front calipers, pads, and rotors. Still a slight pull to the left on hard braking but otherwise it is fine.
Pads on the same caliper should wear reasonably similar. Once you are witnessing one pad wearing faster than the other, it's a strong indication that the caliper pins are sticking and the caliper is not properly sliding side-to-side.
This is a common problem with super duties that tend to sit.
When doing brake work, you should remove the sliding pins, clean out their bores carefully, clean off the pins of any corrosion, and use a good waterproof high-temp grease.
This is the grease I have.
Forgot to mention, the left side was missing the V springs for some reason but the right had them and the pads wore the same on both sides.
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