Yes, the manual gearbox Reliance used the same basic gearbox, either 5-speed direct top, or 6-speed overdrive dependent on the work it was on. Dependening on the date you are thinking back to from about 1967-8 a synchromesh ZF gearbox was an option and eventually replaced the constant mesh unit to become the standard fitment. There were of course, semi-automatic gearboxes available for the Reliance.