Hi. I started having a constant humm on my 05 libby a couple of days after replacing the front rotors and brake pads. It is only when moving and increases as car speed increases, also it seem to be coming from the front at low speed and the back after 55 or so...
I thought it was the front bearing hubs but I replace them and it is still the same. I have looked underneath and don't see anything abnormal. The only other lead I have is that when I turn to the left at any speed over 55 the sound accentuates even more.
Some help please, I am getting stuck on this one.

My more recent lost sound was the intermediate shaft behind my right CV axle, check it out.

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Mike Smith
06 KJ Sport - PA - ONSFARI

OME 926/948 w/ OME Shocks, 3/8 Boiler, 1" LTT, a bit of Clevis lift
MOPAR Skids, Custom trans skid
Valley Roof Basket with Extension (when required), Homemade fence post crossbars with Thule system to compliment
Mastercraft A\T Something or another...

U Joint, Sometimes they can make weird noises. Most likely not but something easy to check.

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2006 Jeep Liberty CRD
1998 Beetle TDI Malone Tuning Stage 2
2001 Dodge Cummins
2005 Dodge Cummins
ASE, OBDII / VAG-CAN scaner / Service Manual

I replaced the ujoints already, what shaft u mean? The one from the transfer case to the front differential? How do I check it? Anything specific I should be looking for on that shaft?

Hearing hoofbeats and thinking Zebras?

You started getting the noise after changing the brakes... I would START there and look for something sticking, since that is what you messed with.

Did you use brake-slyde (or something similar sold in little packets) on the bolts before you re-mounted the calipers? Those bolts have to slide back and forth with the carriers, and if they are sticking, it could be a source of dragging / noise.

Did you bleed the brakes or just clamp the calipers to open them? I usually don't bleed the system, just use a C-clamp to compress the caliper while installing the new pads, but I have heard where the orangutan method I use might not be the best...

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Over 225 CRDs currently driving with my valves, timing belt, rockers, or ARP Studs.
Bad noises = REALLY bad things.

I have also heard that the vents on the rotors will give it a humm. Did you use OEM, or did you get slotted?

Or there could be a zebra stuck in your rotor.

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2002 KJ Limited 3.7
Completely Stock
215/85R16 Kevlar

I'll put some of that brake slide and see if it improves. However, the brakes don't seem to be overheating, and I also used the Orangutan method.
Any more ideas are welcome.

Ok. I did put on the brake pins grease and did bleed the system, but no changes to the sound. have you guys had a sound like that before? if so what you found out was the problem? Thanks