When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have an '04 EX with 6.0. When braking at highway speeds the rear end shudders until I get the truck slowed down some. Around town speeds of 45 or less the problem is almost non-existent. It almost seems to be hydraulic instead of pads/rotor issue. Wouldn't a warped rotor show up at slower speeds as well?
I have some good mechanics around, but have never found a great brake shop that I can trust. Go in needing pads and they try and upsell saying this or that is going out.
Could be break pad deposits on the rotor. This can happen when the pads overheat. An easy fix is to use a very abrasive pad to essentially clean up the rotor (hawk pads are good for this purpose).
Driving home for lunch I experimented some. Above 50 on highway gradually slowing down shudder. 65 more aggressive braking heavy shudder. In town 40 gradual braking fine, 40 hard braking very slight shudder for about 1/2 second. 45 hard braking maybe 1 second shudder. Below 40 all is fine hard braking or gentle. Tried in OD and in 3rd and not difference.
Wouldn't a warped rotor show up at slower speeds as well?
No, because the front brakes provide like 70% of the stopping power of a vehicle.
If they were on the front, then even if it wasn't harsh enough to cause shudder, you would still feel a slight pulsation in the brake pedal that would quickly go away. That's how it was when my Ex had the hot spotting problem on the front rotors. But since you have the shudder on the rear brakes, I could see how when it get's "lighter" and the shudder stops, any pulsations that might still be there wouldn't translate through to the brake pedal.