My front gearbox mount was shot. Found a polybush replacement part which is a easy swap. Remove 4x 18mm bolts, swap the part and tighten the 4x 18mm bolts. Noticed a big improvement in pickup and shift handling. The engine/gearbox is able to move much less, which helps in driveability.

Volvo S80 2.4T PU Gearbox mount

Volvo S80 2.4T New vs Old Gearbox mount

Volvo S80 2.4T New vs Old Gearbox mount

Volvo S80 2.4T PU Gearbox mount