for diesel--- gear oil 90 is mostly used aside sa isuzu which they used enigne oil with 15w40 grade.... but it wold be better if you could use a 80w90 gear oil for your transmission....
gasoiline---- honda uses ATF dexron III... ewan ko lang kung ano ang gamit ng ibang model....
sa honda normally 2.5 liters. don't use anything but engine oil. the 75w90 or 80w90 gear oils normally make the tranny a bit notchy and hard to engage kapag malamig pa makina.
GEAR FF-LSD TYPE 2 is motuls oil for lsd tranny's while MOTYLGEAR is the regular fully synthetic gear oil, GEAR 300 is the ester based gear oil.
correct me if i 'm wrong pero ang lsd o limited slip differential kasi is kapag naka-lift parehas ang both drive wheels, kapag inikot mo yung isa sa isang direction, sabay yung kabilang gulong. unlike sa hindi limited slip differential na kapag inikot mo yung isang gulong sa isang direction, yung kabilang gulong baliktad sa ikot nang pinapa-ikot mong gulong.