nj98feeb
Member
HELLO ALL. maybe someone can help. . i have a 98 5.4 expy and i know that i have to use synthetic fluid for the rear with friction modifier.. but for the front diff is it synthetic blend? or just gear oil.. and do i add any friction modifier to it? also for the transfer case.. it says use mercon.. but can i replace that with mercon v? and do i add any friction modifier to it at all? any help is appreciated. t.i.a... Rico
