Recently had a lot of work done to my van including a new gearbox & steering box at Dorset Dubbers.After no end of problems I took it to another garage who have sorted most of it out for me.One thing that has puzzled the new garage is dorset dubbers filled the new steering box up with grease when it should be oil.Not being mechanical myself does anybody know why they would do that and is it a bad mistake for a so called specialist?