Abstract: The present invention provides separately adjustable right and left spring centering forces for the gearshift lever of manual automobile transmissions by locating individual coil springs to bear on separate spring biasing members extending from the shift lever ball with a separate spring force adjusting screw for each spring and further provides for relocating the gearshift lever of a non-original transmission with a horizontally keyed offset arm connecting the transmission gearshift stub shaft to the gearshift lever with vertical screw connections loaded in tension rather than bending or shear.

Abstract: The present invention provides separately adjustable right and left spring centering forces for the gearshift lever of manual automobile transmissions by locating individual coil springs to bear on separate spring biasing members extending from the shift lever ball with a separate spring force adjusting screw for each spring and further provides for relocating the gearshift lever of a non-original transmission with a horizontally keyed offset arm connecting the transmission gearshift stub shaft to the gearshift lever with vertical screw connections loaded in tension rather than bending or shear.

Abstract: Installing of an SAE standard hydraulic clutch master cylinder, with a threaded push-rod, on an automobile firewall and operable by a pivotally mounted pedal/pedal arm assembly has a cylinder bracket with SAE standard cylinder mounting provisions and also provides a pivotal connection axis perpendicular to the cylinder axis for mounting the cylinder to a reinforcing plate which bolts to the firewall. The cylinder bracket pivots on a horizontal axis and is clamped in position with the push-rod extending to connect to the pedal so that it is aligned with the cylinder axis. The push-rod has a stop which limits fluid displacement by the master cylinder.