The brief
The Golf came in for maintenance, and the inspection turned up the engine and transmission mounts as worn, the cause of the vibration through the cabin and the engine note that had crept up. The owner had them all done, which is the right call when they've gone together. The engine and gearbox sit on rubber mounts that hold their weight and absorb the shake, keeping it out of the cabin. As the rubber ages it sags and cracks, and once it does the drivetrain moves around more than it's meant to: the vibration comes straight through, the engine note climbs in the cabin, and the slack lets it knock against its stops. Mounts that have gone together produce exactly that, and left long enough the loose drivetrain stresses other parts, so they need changing as a set with genuine parts.
The diagnosis
On the lift each mount got a pry-test. The engine mount and the transmission mount had sunk visibly with cracked rubber, the play obvious under load. All of the drivetrain mounts were tired at the same time. When they go together like that, you do them as a set, fitting one fresh mount next to a sagging one just loads the new one harder, so the call was the full set.
The work
The engine and gearbox were taken onto transmission jacks to take their weight, and each tired mount came off in turn. New genuine VW-spec mounts went in across the set, every fastener torqued to the manual figures. With everything bolted up, the drivetrain was checked to be sitting square in the bay before the engine was let down to load onto the fresh mounts. A road test confirmed the vibration was gone and the engine note back to normal.
The outcome
Smooth at idle, no clatter on shifts or over bumps, no vibration through the cabin, and the engine note back where it belongs. The Golf went home with the drivetrain held properly again. Engine and transmission mounts wear as a set and they take the rest of the drivetrain's refinement down with them, so doing the whole set together with genuine parts reset the lot rather than chasing the next sagging one a few months later.
