brake shudder

[Cain2003]

I had a lot of work done on my truck at a professional shop. One thing that was done was new Rotors and pads. but the one of the new rotors (front driver side) warped after only a few test rides and the replacement rotor appears to be causing some bad pulsing after a few times on the brakes.

They've run down everything they could find and used the TMs to troubleshoot, but nothing looks wrong. This is the first Hummer/HMMWV they've worked on so they dont know if there is anything vehicle specific to look for. They went over everything they did with me and it seems like they really did go through all the troubleshooting one would think. But I wanted to throw this out there and see if anyone has had this crop up and if there is something "not normal" that we should look for? I dont drive the truck often or far, and I dont want to be doing brake jobs every few hundred miles because they keep warping.

I did lots of googling and reading on brake warpage in general, but I can't find any HMMWV/H1 specific information on troubleshooting tips.

hopefully someone here has dealt with this and can point us in a new direction.

As always, thank for any advice

 

[glcaines]

Rotor warping is normally caused by high heat. Don't damage your new rotor - find out the cause. I'm assuming the wheel will turn freely with no significant drag? I would first suspect a caliper problem. If only one pad is being applied to the rotor under pressure, this can cause significant heat buildup and warping. Make certain that the caliper is functioning properly.

 

[Mogman]

I am curious how you know it is the front drivers side?

 

[Retiredwarhorses]

It’s not uncommon for a new rotor to be warped…I’ve had it happen.
either replace them again or have the shop turn them Down to see if they are warped.

 

[Cain2003]

I am curious how you know it is the front drivers side?

That’s a good question, based on test drives and using a thermal sensor it looked like the front driver side was causing the issue. But after another look, the front passenger side is actually getting hotter and repeated test drives doing hard brake tests results in a more pronounced pull to the right.

 

[Cain2003]

Rotor warping is normally caused by high heat. Don't damage your new rotor - find out the cause. I'm assuming the wheel will turn freely with no significant drag? I would first suspect a caliper problem. If only one pad is being applied to the rotor under pressure, this can cause significant heat buildup and warping. Make certain that the caliper is functioning properly.

I’m really thinking the caliper is the problem. We are going to just swap it and see. It’s one of those annoying little things that “wasn’t a problem” when the truck started getting torn apart last year lol. Reassembly is a pain.