Van makes noise when i accelerate - 2001 Chrysler Town & Country

Check the wheel bearing. If over or under torqued, it may give problems. Check the drive shaft is not bent from hitting a large stone whilst moving.

The transmission was rebuilt-- but not the differential
within the same case

You hear worn out bearing noise

suspected clutch throw out bearing
failing
pressing on the clutch pedal loads up the bearing and the noise stops but removing the foot from the peddle allows the the pressure plate fingers to spin a loose bearing race ans so makes the noise

could be the wear indicators on your break pads which mean your brakes need changing.

i think you need to take a look at your front axle. I htink a worn ruber seal may have let debris get into the axle or even the bearings.

Could very well be low fluid in torque converter or the very common automatic torque converter clutch circuit failure in many GM vehicles.

you could have more than one problem the vibration accelrating maybe an inner cv joint ,if you just had the tires replace and an aligment done they should have checked the front end for worn out ball joint and tierods but the wheel bearing may not have any movment but can still make noise

you most likely have an aftermarket radio installed
the noise you hear is engine noise, if yo turn your radio off it will go away
this can be fixed by either getting better wiring for your aftermarket radio or by installing a noise filter, you can purchase that at most big electronic stores

The serpentine belt is the most common cause for whining sound when accelerating, try to understand if noise is coming from serpentine belt.

Also check power steering belt under steering column, and also the rotor and chain, thei do not make whining noise , but can make noise when accelerating.

The belt is first suspect.

have they checked front c.v. joints, as far as knocking noise it could be several things.