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Old 01-25-2001, 07:54 AM
Posts: n/a
Don't know about the heater problem but vibration could be any number of things. I'd check (in order) center bearing (on shaft), transmission mounts, engine mounts, and rubber flex-disc on shaft. Because its only during acceleration, the driveshaft is likely not out of balance. The costs of these things are not terrible - particularly if you can do it yourself.

'85 300CD @ 137k miles.
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