Engine Rattling And Whining Sounds problems of the 2002 Jeep Wrangler

March 2009: while driving at 55mph, hear a rattle noise, then the shift on the floor shakes violently. Pull over, cannot find anything wrong, travel home less than 50 mph, fine. Few more times, on the highway, car does it again. Put in fuel injector cleaner, change oil, clean all around battery. Does not do it for a week or two then does it again. Told to replace camshaft sensor & crankshaft sensor. Did and ran fine no issues for two weeks. 4/13/09 after sitting at a red traffic light, proceeded to turn right, engine died. No warning no sound,no dash lights on, waited a few minutes, started up & traveled home. 4/15/09 after sitting at a traffic light while driving forward, car died, no sound,chugging, no dash lights we went to Jeep in fort myers florida. They said we need to change our oil, add a fuel additive, injector cleaner & clean our battery in addition to replace one of the sensors. All of this was already done. If that does not solve the issue, then it is our ignition switch. Cost to us for this diagnosis $110. 19. 4/27/09 towed Jeep with RV to mainewent to Jeep dealer macdonald motors bridgton maine. 5/04/09 car died while driving to the appointment, this time 45-50mph. Wanted to replace crank sensor with a ?mopar? brand, even though we told him it was just done. Also wanted to complete combustion chamber cleaner from bulletin 09-003-03. Declined. Cost $55. 81 5/18/09 took car into macdonalds motors for bulletin 09-003-03 to be done & asked them to check grounding mounts. Rec'd call that they performed fuel system cleaning & need a new crank sensor. We spoke to the manager, because the work we requested was not performed, and other items were. He assured us the bulletin would be performed the inspection was performed, no repair was needed and the grounding mounts were fine and the computer no longer tells them it needs a crank sensor. This vehicle has died three more times since their repairs.