My car has slight vibration on highway speeds 110Km and above. This is felt in the body of the car. My mechanic did take a look at it by removing the rear drive shaft. The universal is free in one direction and is slighly binding in the other. Lubrication on it lossened it a bit not completely. Shimming the tranny mount did help a bit.

Can the binding at the universal be removed and ideas

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SANDEEEP
89 300SEL
230,000Km