My Excursion has started with a weird engine squeal. The truck sat for a few weeks and now it has a squeal when driving, starts at about 2500 RPM and stops each time it shifts. Will not do it in neutral. Kind of sounds like when an alternator bearing goes. But I removed the serpentine belt and drove the truck quickly. The noise was still there, so that eliminates all the front belt components. Anybody have anything similar ever?

 

Is it a top end or bottom end squeal?

 

Cant tell. Echos all over the place when driving and will not do it when parked. Only way I can do it with out driving is with about a 2000 RPM reverse power stand. and then there is so much other noise you cant tell where.

 

Drive [POSSIBLE] train noise since its moving and squealing. Cancel that since you went 2000 rpm reverse standing on the brake

2 wheel, 4 wheel drive

Wheel Bearing(s)

Brake pads, disc, caliper

Drive shaft yoke

Transmission

2500 rpm in OD or out

Maby torque converter or vacuum leak