hi can any one tell me if a wrx gearbox will fit a turbo 2000 uk model both gearboxes look the same exsept the wrx gear box has a square box on top of it to the rear end guess that is for that electronic diff thingy but mine dosent have that but and a big but would i be able to swap the rear off that box with mine to get rid of that electronic thingy????????????????? thanks people