Weird sound, normal?

[DokWatson]

I noticed when I park on an incline, the truck makes a weird sound. Not sure how to describe it. Its almost like a mix between a sucking sound, and a whining sound... if that makes sense. Also hard to tell exactly where it comes from, seems to come from everywhere. What the heck is it?

 

[DokWatson]

Since the brakes run on the power steering, could I just be hearing them working against the heavy truck on a hill? Parking brake is set.

 

[91W350]

Air cleaner wing nuts tight? When I picked up my second M1009 it had an off and on sucking and rattling sound, the air cleaner was really loose.

 

[DokWatson]

Went and started it up, not doing it now. Who knows... was pretty weird when it happened. Air cleaner is on there good.

 

[tigger]

Gremlins!

 

[DokWatson]

I think it may have been an exhaust pipe rubbing, I have a broken hangar. On an incline it must have hung lower and vibrated on the cross member. Sure sounded weird in the cab