Hi I recently took my BMW diff out leaving the carrier in the car. This was fairly easy. I took the A frame off to give more room, which was also easy. The problem was to get the diff back in. Plan A was to leave the carrier in the car. However, this turned out to be very difficult. Plan B was to take the carrier out, fit the diff to the carrier and then fit carrier plus diff back in the car. This wasn't easy, but it was possible. I think the reason that Plan B worked better than Plan A is that there is no give between the diff and the carrier, but there is some give between the carrier and the chassis. Luckily a fellow member with much more skill and experience than me helped. Many thanks Graham. Hope that helps. Good luck. Ivan