pikeman2210
Member
Having done the gear box, front differential and Haldex (2nd time of doing the haldex) oil changes (more about the Gear box later) I came to doing the Rear Differential. Having located the fill and drain plugs (see photos) I removed the fill plug and then the drain plug but no oil came out. Surely there couldn't have not been oil in the Differential box. I've had the vehicle (T6, 4 motion, 2018) from new. So I started put oil in. As soon as I put some in , straight away it ran out. Perhaps I've got the wrong drain plug. Tried another possible one but proved not to be. Besides the drain plug bolt is quite distinctive. I removed the drain plug again and blew air up the drain hole and some oil did come out of the fill plug. The only good thing at the moment is that one may conclude there is oil in the Differential box and the oil looks to be in good condition (Va.n has done 56K) I've thought about asking VW (as opposed to my local gargae) to do the Differential oil change but they told me the oil and drain plug is £93 [(ok I can wear that (drain plug is £5)] Worst is even if job takes 15 mins they will charge an hours labout £120. If they charged pro rata I'd go for it and ask to watch. Anyone any thoughts on why no oil has come out assuming I undid the correct drain plug?
Gear box: after much searching I found the fill plug (hidden but plastic trim) Collected about 3 litre of oil. Although all my research says the volume of oil required is 2.7 litres I put 3 litres of fresh oil in. The Haynes manual for a front wheel drive says fill to overflowing. Thinking the level wouldn't be that far off overflowing I purchased another litre of oil and all of it was added without it overflowing. A friend of mine who is a retired Mechanical engineer and worked on engine development says fill it to overflowing. There should be a vent to relieve any pressure. If doing so is too much oil then the result will probably mean increased fuel consumption due to viscous drag and if completely overfill it it should dump oil. So to summerise: Literature statres 2,7 litres oil required. 3 litres emptied and 4 litres put back and still not coming out of the fill hole. Yes vehicle was level. Anyone any thoughts? Stick or add more?
Regards
Stephen
Gear box: after much searching I found the fill plug (hidden but plastic trim) Collected about 3 litre of oil. Although all my research says the volume of oil required is 2.7 litres I put 3 litres of fresh oil in. The Haynes manual for a front wheel drive says fill to overflowing. Thinking the level wouldn't be that far off overflowing I purchased another litre of oil and all of it was added without it overflowing. A friend of mine who is a retired Mechanical engineer and worked on engine development says fill it to overflowing. There should be a vent to relieve any pressure. If doing so is too much oil then the result will probably mean increased fuel consumption due to viscous drag and if completely overfill it it should dump oil. So to summerise: Literature statres 2,7 litres oil required. 3 litres emptied and 4 litres put back and still not coming out of the fill hole. Yes vehicle was level. Anyone any thoughts? Stick or add more?
Regards
Stephen
