Hi Graham, not an anti tramp bar but a torque reaction bar. It ran down to a bracket near the tail of the gearbox and secure to the floor and chassis rail. I don't need it, so dispensed with it.
It's designed to keep the nose of the diff in the correct plane when really powering on the power. They often disconnect them if running in the wet to help improve grip I guess. The car retains its normal twin anti tramp bars and panhard rod though.
