Syncro - Specifications Oils
Transaxle
Spec: GL-4
4.5 litres from empty (new); Can overfill on floor, install and when installed and level, remove level/filler plug and drain back to bottom of hole. People are now using (for a better 1st>2nd gearchange when cold and good all-round protection, more modern lubes e.g Amsoil, and the semi-synthetic 75W-90 combined gbox/diff oils e,g, FUCHS, Comma (red bottle) etc..
Aidan
please can the reference to Redline MT90 be pulled from the WIKI, I do not recommend this oil at all, every box I've known that has had it has had issues, and there is a lot of evidence from the states of excessive wear with this product, Daryl at AA transaxles has been looking at this problem and now he no longer recommends it and on the Vanagon forums it's been spread about that it's not good - unfortunatly the UK importer is targeting the T3 market on ebay, based on old recommendations
The Carlube 75w/90 gl4/gl5 is what i use now that the Fuchs is no longer readily available, if you want to spend a lot of dosh then use Millers, and if you want to spend a fortune then use the SWEPCO, but personally I go with the £20 stuff regularly changed and from what I'm seeing on wear after 5 years that advice stands
Front Diff
Spec GL-4 or GL-5 EP 80W Ditto transaxle sem-synths 1.5 litres
Warnings
AmazingDave: When I went to the lube suppliers to replace Al's oil they showed the syncro petrol box as needing 3 litres and the diesel needing 4 litres... ? It's the Morris lubricants catalogue... Aidan: The figures they are giving are factory spec for the four speed 2wd box, but even there I'd recommend four litres regardless. The petrols with less torque run less oil for a smoother gearchange supposedly, but the syncros are 4.5 litres from empty regardless of engine.
General
Maybe 4 litres when oil changfed in situ, due to trapped oil ariound diff casing and nose cone..