I just noticed today if i rev my engine up to 2000-2500RPM i can feel a pretty strong engine vibration. I put a screwdriver to the shifter and it sounded like a very low toned fast vibration directly related to engine rpm, but most noticible around 2300RPM. Any ideas as to what this could be? What would cause an engine to vibrate like that? I can actually see the transmission and transfer case shake when idle a little.

 

Have you checked your motor mounts?

 

yah i looked at them, i couldnt really tell much. I put the truck in gear and rocked it while i watched the engine, i didnt see any excessive movement.

 

pci time? (plugs cap rotor)

 

maybe i dont know

 

anything else it could be? Im thinking something internal. Would a slightly unbalanced crankshaft cause this?