Just picked the car up from having the gearbox and differentials done. One of the studs on the gearbox oil pan was just spinning, so had to be drilled and a nut and bolt fitted. I’d got a fuel filter from main dealer, but had the wrong filter in the box, so went and got them to change it for me on the way home. I’ll have that fitted in the next few weeks when I have the power steering and brake fluid changed. Total cost for differential oil was £212, and the gearbox filter and oil was £591. Labour was £400. Now, I’ll save up and replace the wheel bearings and brake backing discs,radius arms, wishbones, rear subframe bushes and suspension. Anyway, driving the car now, the gear changes are smooth, and feels much better. Bet you’re all running round trying to get rid of your x6’s now!😂 When I bought this, I knew I’d have to pay out big due to the mileage. At this mileage, it would be advisable to refresh the suspension and handling, as by now, the stock gear is way past its use by date, and the engine work Im having done is both preventative and will give many miles of trouble free driving.