Unlike the broader 981 range that offered the 7-speed PDK dual-clutch transmission, Porsche equipped the 981 GT4 and Spyder exclusively with a 6-speed manual gearbox to maximise driver engagement. Transferring output to the tarmac through this manual transmission requires a rigid driveline. Factory rubber mounts degrade over time, leading to transmission deflection and imprecise gear selection. Installing stiffened polyurethane Drivetrain Bushes secures the transaxle and sharpens throttle response. For those developing dedicated track cars, future modifications such as heavy-duty clutches, lightweight flywheels, and solid engine mounts will further ensure the drivetrain handles aggressive inputs without hesitation.