Quote:
Originally Posted by Chboro
I'm the second owner. Had no maintenance records when I purchased 7 years ago. I'm thinking the mounts are all original. When I replaced the plugs and tubes I did examine the coil packs and all were good. First time I ever experienced this vibration at any speed. When it happened I was going a steady 82mph. No excessive play at the shifter. I'll look at getting the tranny and engine mounts replaced 1st.
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The tranny mounts are oil filled so if they are not leaking oil they are most likely fine.
The center mount (engine mount) on the other hand has a rubber center that is certainly shot after 20 years.
If it is shot and you are in tune with your car you can feel the engine rotate in a front to back or back to front manner when slowly letting the clutch out. The shift lever will sometimes move in a forward to back manner as well.But not always.
Or if you slowly go over a speed bump you can feel the play in the mount, sort of a slight forward to back rock of the engine. Sometimes a little clunk or thump.
As for your vibration at speed check the bolts that mount the drive axles to the trans for tightness. Six per side I think.
I had a similar thing happen but at around 75 MPH but I could feel it in the steering wheel.
All new Michelin P4 tires.
Took road-force balancing the tires to sort it out. Regular balance method didn't cut it.