about 3 quarts
0w80 synthetic gear oil.
6 litres
based on a 2002 D4D 2.5l toyota hiace, the oil capacity is 7.3litres in the engine and another 0.7litres in the filter. (source - commaoil website)
limited slip diff uses 75w-140 synthetic with 4 oz. friction modifier without slip diff. uses 75w-140 synthetic
The oil capacity is 5.7 quarts with oil/filter change.
80w90 oil
For 1996-2006 75-90w semi-synthetic oil
the front diff is part of the gearbox and the diff/gearbox oil is the same-there is a dipstick on the offside of the box near the bellhousing.
I think its six litres with an empty filter.
Rear diff, 7.9 pints.Front diff, 2.4 pints.
The Diff oil ir either needing changed or topped up, if its a whining noise that is.