hey redstroke
If your truck is a shift on the fly try turning the knob on the dash to 4 wheel drive and back,if the noise quits then I would say its the needle bearing in the hub assy thats gone bad. My truck was doing the same thing,if you put your hubs in the manual position it will stop that...
gap
hey great white since it works ok with the jumper wire,try taking a shim washer out of your clutch closing the gap a little,I did mine and my air works fine all the time now.
compressor clutch clearance gap
Hey haymaster
my 7.3 air cond. was doing the same thing and I took the front half of my compressor clutch off and took one of the shim washers out and put it back together and its has worked fine ever since. when the gap is too big it loses it ability to...