Hi there, 
FOund the post on here listing all lubricants (very helpful) 
"Front axle 1.2 4874468 API 75W90 GL5 gear oil 
Rear axle* 1.4 4874468 API 75W90 GL5 gear oil 
*Use additive 04318060AB 
with Trac-Lok differential "
My wife has an Xtrail and i was checking the Castrol website to service her car and checked the info for my Jeep:-
"Manual Transmission - 
Automatic Transmission REFER TO MAIN DEALER (b) 3.8 (c) 
Differential Syntrax Universal (d,e,f) 1.5 / 1.6 
Coolant (50%) Antifreeze 9.0 
Brake Fluid Response DOT 4 
Grease Points REFER TO MAIN DEALER 
Power Steering REFER TO MAIN DEALER 
Transfer Box ATF TQ DIII 1.2 
TQ-D "
My question is...can i use this "Syntrax Universal" in my Diffs? 
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=190354010781&ssPageName=STRK:MEWAX:ITAnd will i need an additive in both diffs?
is this the one?
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=320567786831&ssPageName=STRK:MEWAX:ITThanks
Gary