Hopefully somebody here will help me figure this out. The "squeak" only happens when im in reverse, and it speeds up the faster as the truck goes faster. Ive looked into a wheel rubbing issue no go there. It mainly sounds like a belt squeaking, but if it was the belt wouldn't it do it in forward as well? I've noticed too that it only makes that noise when i let the clutch out in reverse. I've recently changed the gear oil in the tranny, nothing else has been done to the truck. Any help would be appreciated. If needed I can upload a video to show what i mean.
Does the squeak change when you engage the brakes? Even lightly? And how fast is the squeak? If you let off of the clutch and gas, and then coast backwards, is it still there? Then brake?
no, the squeak doesn't stop when applied the brakes but, it does stop when coasting and the transmission is in neutral. If in reverse and on the gas the squeak gets faster. The noise is like a pulse, if your going slow in reverse the noise is slow the faster you go in reverse the faster the noise gets. Its not a solid noise, it's a repetitive noise.
the answer both your questions are yes, it is tied to the speed of the truck and it doesn't get louder just faster.
LOL, my truck JUST started doing the exact same thing! but mine sounds like its coming from under the bed, maybe even the clutch..
sorry for the poor quality camera phone, if you can hear it the noise is at 10 sec or 12 sec. and at 33-35 sec <object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/ZxxnmT2L8tI?hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/ZxxnmT2L8tI?hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
Ok, since it isn't there in neutral (reverse), or in any of the forward gears, and you just changed the gear oil (?), I would guess that it may be one of the bushings or bearings associated with the reverse gear inside the tranny. I doubt it has anything to do with the clutch or throwout bearing, because any noise from them would happen in any gear. The fact that it doesn't do it with the clutch disengaged leads me to believe that it isn't located from the output shaft back to the axle. Which leaves only what is between the clutch and the output shaft.
before you do that, talk to a tranny shop and see what they say. It might be something easy or cheap.
jack up the rear end off the ground (block the front duh!) and put it into reverse, idling off engine, see where it comes from. and be smart about it, having an axle off the ground with wheels spinning isn't safe.
Do you have a 2-piece driveshaft? Could be U-joints or center bearing if it's a 2-piece driveshaft...
I just don't want it to fall on you. if the wheels are spinning too fast, don't even try lol.... anyway, i figured it'd be the easiest way to hear the squeak yourself from whatever place its coming from.