[spannerrash]

Thanks for the reply and thanks very much for the offer to loan me your spare. I think I'll just buy one though and fit it. I'm not really sure if there is anything wrong with the one that's in it really. I'm just trying to understand if anything may be causing the car to shift gear whilst under load.

I'm not sure at all what the shift strategy is for this car and what could cause the box to damage itself. I'm not even sure that there is anything going on at all. The box could just simply be wearing out.