Auto Box again

Following my last thread for the above problem I took the car to a Specialized Land Rover garage yesterday and they confirmed it probably is the Reverse brake band but Today I received an email from Dave Ashcroft of Ashcroft Engineering and he has told me it could also be a problem with the rear Viscous Coupling. I had a new Front Diff Mounting (rear axle) fitted by the same Land Rover garage in November of this year, could that be significant?
cheers

It's the reverse brake band, and nothing to do with the VCU or diff.

Okay, thanks for that. I"ll drive it for a while and then see what happens. I may end up selling it for spares!!!