A few MOT's through and the "mist" on the diff is now apparently a leak.... The DIff is Type 9,5 speed heavy duty long 1st - Diff 3.92:1 fitted with ZF plate type LSD. (notes from the previous owner) Apparently, there are two types of bearing, one crushes (didn't understand that) and i need to change the flange/seal to stop the leak. can any advise who to speak to to get this fixed/ assessed