GusB
Established Member
Further to my post last night, the source was "Beyond Reality" by A D Jack and says:That would make sense as Leyland was winding down its engine production during the 1980s and going into a joint venture with Cummins (when the Cummins B series was launched in the UK Leyland rebadged it as the Leyland 300 Series for a short while). Leyland buses had moved completely to Voith or ZF gearboxes by the late 1980s and I'm not sure what other business SCG had by then: probably not much.
...Cummins bought Self Changing Gears, principally to gain access to the latter's technology in railcar transmissions and to be able to offer complete power-packs.
I also did a bit of Googling afterwards and found this link: https://www.gracesguide.co.uk/Self-Changing_Gear_Co
So effectively it ended up under the ownership of another former Leyland subsidiary.1989 Cummins sold the company to United Scientific Holdings which later became Alvis plc