Transmission mounts are one of those components that work invisibly until they fail, and then everything becomes slightly worse in a way that's difficult to identify without knowing what you're looking for. A worn transmission mount allows the gearbox to move under torque and vibration loads — which means gear changes that were once crisp become slightly vague, the shifter's position relative to the gate shifts slightly under acceleration, and the overall drivetrain feels less like a unit and more like a collection of parts that don't quite agree with each other.

The NISMO Rear Reinforced Gearbox Transmission Mount (11320-RSR45) fits BNR32, BCNR33, R33, and R34 Skyline applications — essentially the full classic GT-R production range. It's a stiffer-than-stock mount using a compound that transmits more NVH than the OEM rubber (you'll feel more vibration through the body at idle — this is normal and the trade-off for performance) but holds the gearbox in a much more consistent position through the full operating range of loads the drivetrain sees.

The Gear Change Improvement

With the NISMO mount installed, the gearbox moves less under load. This means the gear lever sits in a more consistent position relative to the gate, which means your inputs go directly to the synchros without the mechanical ambiguity of a mount that's allowing movement in multiple directions. Quick changes — especially under hard acceleration where gearbox torque reaction is highest — become more positive and more repeatable. You find you're making fewer mistakes in the gear you intended to select.

For a GT-R that's producing more than factory power, the transmission mount sees higher loads than it was designed for. NISMO's reinforced compound is specified for these conditions. The NISMO Transmission Mount at ¥15,660 is one of the more cost-effective drivetrain upgrades available — it improves a part that's probably worn out anyway and makes the gear change better in the process.