The gearbox was still three-speed with column change but an overdrive was available. As standard, the 3.3-litre cars had a three-speed column-change gearbox, with a four-speed floor-change unit as an option. Three-speed hydramatic automatic transmission was available with both engines but this was changed to the two-speed Powerglide unit towards the end of the 3.3-litre PB run. Servo-assisted brakes, with discs at the front, were fitted. Minor changes to gearing and the option of power steering were introduced early in 1965 and the PB series continued until replaced by the PC models in October of that year.