[GeoRoss]

I noticed a squeal coming from somewhere over the past few days. I can only hear it at slow speeds <20 mph. The tires are too noisy to hear it at higher speeds. I can't tell if it is from the rear/front/underneath. It is abit subtle as I have to be off the throttle to hear it. Not present when the vehicle is at a stop (in or out of gear). It appears to be more pronounced after a bit of driving.

The brakes are a little noisy, but it is not the "need new pads" squeal. I do have abit of a noisy PS pump, but I can only hear it while in reverse.

Front axle service done about 10,000 miles ago. New bearings all around. I do notice abit of grease (red wheel bearing grease) leaking from the bottom DS knuckle studs. They are torqued to FSM specs. The truck has always had a slight pull to the the PS, before and after the front axle service. Tire wear is even.

Front brakes (80's pads) and new front rotors done at the same time as the front axle service.

New rear brake pads and front and rear caliper rebuild 4000 miles ago.

LSVP properly adjusted about 3000 miles ago, about 5000 miles after a 850/864 (1.5" front spacers) lift on a light truck (I forgot I needed to do that ). The OME caster doohinkuses are correctly installed and the truck handles well. No alignment numbers to corroborate this 'feeling'.

The drive shaft is greased, but could use some TLC (take apart, clean and grease by hand). I cannot detect any bad drive line vibrations before or after the lift. I do have the accelleration 'clunk' that goes away after greasing.

The U-joints are well greased every 2-4000 miles. I am not sure how to check/tell for bad U-joints myself.

How can I isolate wheel/trunion bearings from TC output bearings, etc safely? While coasting, putting the tranny in N, what would that isolate? Can I then put the transfer in N (with the tranny in N) while coasting? Would that isolate tranny noise, transfer noise from wheel/trunion bearing noise?

Could it also be a faulty emergency brake?

Just looking for abit of guidance in how to properly isolate and correct this noise. Thanks,

Ross

[GeoRoss]

Muffler bearings checked out ok

Any other suggestions?

[jamisobe]

Does the squeak stop when you step on the brakes?

I know your symptoms sound similar to what I was experiencing. My squeal turned out to be a small sliver of brake pad material hanging over the edge of the rotor. I took a chisel to the sliver and the squeal is gone for the most part. Every once in a while I will hear a little but it will always go away when I step on the brakes.