Chrysler Repair: Nitro 07: starter motor doesnt disengage

Question
Truck keeps cranking when started have to turn off and start again especially when i drive for long distance and shut off
Runs perfectly when running no service engine lights are on please please help

Answer
Hi Aaron,
Sorry for the delay in responding but I just found your question in the "pool" to which Kevin had referred it.
If I understand correctly, your starter motor is not disengaging when the engine starts so you have to turn off the engine, correct?
The problem could be one of several items in the starter motor circuit:
The ignition switch section that powers the starter motor might not release when you back off the key from the start to the run position
The starter motor relay could stick in the closed position
The starter motor solenoid switch could stick in the closed position
The starter motor drive unit might not decouple from the gear that it drives
The starter motor might be loose in its mounting so that the gear doesn't disengage from the gear on the crankshaft disc so check for the starter motor's mounting bolts that hold it in place.
I have the Nitro service manual and can tell you about the wiring of the starter motor circuit so you could check out whether any of those parts is the cause of this.
Roland