The upper engine mount may wear prematurely. Symptoms may include a harsh feeling when the transmission is shifting and roughness when the engine is idling. Worn engine mounts should be replaced as necessary.
Car Problem Reports
Volvo C70 Upper Engine Mount May Wear Prematurely
Volvo C70 Problem
Engine Affected: 2.5L 5 Cylinder Turbo
Visitor, 2008 Volvo C70, 2.5L 5 Cylinder Turbo, 104,000 mi
There is a vibration throughout the car as though there is a bad back tire starting quite noticably at around 35 to 40 mph and continues to up to around 70 mph. If I stop accelerating at any point or speed, it stops immediately. There is no engine light and there is no vibration if the accelerator is not engaged. The tires have been checked and they are new. So, vibrations only when acclerator is employed; stops as soon as it is released.