The grinding noise in the front of a 1990 Dodge Caravan could be a cv joint. If it is, it probably only grinds when you take a sharp turn. There is one located on each side.
Bearing going bad?
Pool filter making noise
A dodge caravan may be experiencing rear brake noise due to needing new brake pads. This may also be due to worn rotors.
drive belts tensioner/under chassis
New CV joints will fix the grinding noise
I have the same problem if it was making a grinding noise contact ego-fly if its not making a grinding noise the rotors might be hitting each other
Loose sub frame mounts, broken motor mount. engine misfire. broken transmission mount.
Sounds like you need a water pump, The bearings in the water pump are making the noise not the pulley.
engine problems not trans.
check the guard behind the rotors could be rubbing