My 94 GXE has a bit of a vibration after it's warmed up. If I put the car in park, the vibration becomes a jittery knocking feeling. The vibration isn't bad sometimes, but other times it can be really noticeable, like a nice *** buzz I was wondering if anyone had a good idea of what this might be... TIA






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94 GXE
95k miles

 

oh , one other thing.. the car is dead smooth once you engage the drivetrain... all shifts are smooth, the car is really nice all around, its just when it's sitting still does it do this...