Crunching noise from back of truck

[Punkfinder]

93 SE-V6 w/ 4-wheel disc brakes here.

 

After having my truck sitting for a week (not sure if that had something to do with it), I've noticed an occasional crunching noise coming from the rear end of my Pathy. I only hear when just moving forward from a stop and it seems to occur for a short period during each rear wheel rotation. I usually hear it for 3-4 rotations of the wheels then it disappears; and I don't think it's still there after speeding up because I can also feel the crunching as a slight vibration from the rear, and that disappears as well. It only occurs intermittently; I don't hear it every time I pull away from a stop, maybe only once every 3-4 times I pull away.

 

I took it to a tranny shop because I thought it was maybe a cracking U-joint, rear diff. problem, or maybe the rear axle; they took it for a few spins but also said it occurred so infrequently that they couldn't nail down the source of the noise or see a problem, although they did hear it.

 

Any ideas?

 

Thanks for any help!

[adamzan]

Maybe check the rear brakes? I know when mine sat for 2 weeks the rear brakes made some real nasty noises.

[edicer2]

could it be sqeaky struts/shocks or something of that nature? also check your brakes like he said

[Nismojunky]

do you smell burning brakes? and do you use your ebrake your shoes could be sticking had the same problem my shoes were sticking

[Tungsten]

my brakes make crunchy noises when wet idk if that helps

[Punkfinder]

Thanks for the posts. I could have sworn the noises were coming from the back...installed some Warn hubs tonight and noise is gone, no more crunching.