Thinking about a Gear Vendors OD. Can Anybody Give Some Guidance?

the gear vendors is a Laycock de Normanville overdrive, a constant on british cars of 50s -70s taxis luxury cars and small trucks.

which used a long obsolete double latching relay and a bunch of switches on the gear linkage, made by lucas to switch it out when you were doing something that would break it, as per situations mentioned above.

the main market these days is pickup trucks with truck gearing for day to day use and the overdrive for traveling economically to "site" of work.


latest versions made by Laycock enginerring/GKN for mitsubishi and Volvo P-type i think
believe gear vendors must have a nice collaborative arrangement with GKN
and who knows if they take units as manufactured or they toughen them up...
Volvo 740 turbo was a heavy car with decent torque so maybe not...hard to say

P version is a big shaft version J is a small shaft version
all previous versions designed really for small capacity motor use.

one thing you used to be able to get was a stand alone unit that had a splined input and output.

the unit was mounted somewhere in the middle of the chassis in the middle of the tail shaft

i think the unit on some mitsubishi pickups was like that.

if you could find one for low $$$ that might be a way in to OD for say a slant or 318 with no transmission work at all

Dave

remote_overdrive_unit.jpg