140 M46 Overdrive Gearbox into 1974 140 wiring
I am planning through fitting an M46 4 speed +overdrive gearbox to a 1974 140 Volvo.
I've got the mechanical side of things worked out and am now thinking through the electronic control of the overdrive. Does anyone know how overdrive control is usually wired into a 1974 140 for the M41 and if this will work with a M46?
Many thanks, Ess.