The Gear Vendors unit is basically the same Laycock OD that was installed in 1950's and 60's European and British cars like the Jaguar, Austin-Healey, Volvo, etc. It's not terribly rugged, and it's very expensive to repair. It uses a cone clutch to engage the OD and it has its own small hydraulic pump built into the unit to provide pressure to apply the clutch. It didn't work well 50 years ago, and I haven't seen much evidence that any upgrades have been made to the 1950's technology. Run, do not walk away from that one!
Jerry
