Dodge Repair Questions? Ask a Mechanic for Answers ASAP
I am not a Diesel expert, but I do know that when the over-running clutch on a starter drive gear goes bad, the starter will just spin and not turn the flywheel. When they bench tested the starter they just checked that the motor and solenoid works, they really have no way to tell you if the over-running clutch is any good or not because when testing the starter there is no flywheel in use when testing. I would look for a shop in the yellow pages who specializes in rebuilding starters and ask them how much to rebuild it with a new over-running clutch because an whole new starter might cost $200.
I believe you should open a new post for that question.