After reading many posts on mounts I decided to replace the motor & trans mounts on my 1984 300cdt.
While there is noticably less vibration at idle there is a noticable vibration that starts at 40mph which begins to subside when I get over 60mph. It is also very noticable when the car is slowing down and quits when I get below 40mph.
The vibration is definitely not related to the engine speed, only the speed of the car. If I put the car in neutral while over 40 the vibration stops.
When the mounts were replaced they had pretty much collapsed. Is it possible that the new angle of the engine/trans has affected the drive shaft joints?
The car has relatively low miles 150K. The engine runs well & trans shifts & feels smooth other than vibration noted.

Any help would be apprectaied.

Tom H
1984 300cdt 150,000