ok cards on table time--- my gearbox and diff came from my mate who rolled his car and ended up breaking it for spares. after a while he bought another v-ltd it was the same year same spec same everything it was even the next one off the production line the 1st one was number 176 and his new one is number 177 (freaky i know) however he seemed to like the feel of his old gear box better and decided to swap it from his old car to his new one. he didnt howerver change the diff as he said for sure the ratios would be the same???? his car drives with no noise or problems at all. so that left me with the box from one car and the diff from another. could this be the problem we didnt think it could be but im sure one of you out there will have a answer for us