highlandwarrior
New member
94 YJ with AX5 transmission and 231 transfer case. I know the transmission specs call for 75w-90-API GL5 gear oil but have been told that the transfer case uses Mercon transmission fluid. This is what I thought but also was told you can use the same oil in the transfer case AND the transmission. Any info and additional recomendations as to fluid types would be great.