Attention: TDR Forum Junkies 
Right up front, I'm posting this for a friend who just called me with this problem. He has an '03 4WD 2500 with the 5.9 in it.
He told me that "it has happened before", but called me this afternoon because it happened again. He said he would be driving and the tach would stick at an RPM like 1500 or 2000. When he shuts the truck off the tach drops to 0. He hasn't noticed anything regarding engine or transmission performance. My thoughts were that it is not engine related, but almost certainly an electrical or mechanical issue with the tach itself, or a sensor. He was inclined to agree, but because so much of modern vehicles are electronic or computer related he is concerned that it could lead to a bigger problem down the road.
I should probably add that a few years back he had some kind of a problem that resulted in having to get a new instrument cluster. That's a tale in itself, because if I remember correctly the dealer had to actually send the instrument cluster back to the factory before they would send out another one for installation. The reasoning was that only the factory could be trusted to program in the correct mileage.
Any ideas or suggestions that would cause the needle on the tach to stick?
Thanks.
He told me that "it has happened before", but called me this afternoon because it happened again. He said he would be driving and the tach would stick at an RPM like 1500 or 2000. When he shuts the truck off the tach drops to 0. He hasn't noticed anything regarding engine or transmission performance. My thoughts were that it is not engine related, but almost certainly an electrical or mechanical issue with the tach itself, or a sensor. He was inclined to agree, but because so much of modern vehicles are electronic or computer related he is concerned that it could lead to a bigger problem down the road.
I should probably add that a few years back he had some kind of a problem that resulted in having to get a new instrument cluster. That's a tale in itself, because if I remember correctly the dealer had to actually send the instrument cluster back to the factory before they would send out another one for installation. The reasoning was that only the factory could be trusted to program in the correct mileage.
Any ideas or suggestions that would cause the needle on the tach to stick?
Thanks.
