I haven't owned a 4x4 before so I don't know the normal weight of oil to add. I was assuming 90w gear oil to the axles and transmission, but I read in the service manual there is genuine mopar stuff that can be had. I dont have a lot of $$ to be spending on this truck (its no piece of art haha), so I was hoping there was a substitution. Anyone know of something?

 

What 5spd?

Transfer case gets ATF.

 

from the haynes manual...
NV3500 mopar 4761526 or equivalent
NV4500 sae75w-90 mopar 4637579 or castrol syntorq synthetic
NV5600 mopar 4874464 or equivalent

diff oil sae90w GL-5 gear lube.
LSD - friction modifier 4318060 or equiv.
t-case - any ATF, dexron 3 or atf+4

i don't have a manual trans, so i don't know what the equivalents are.

 

GM synchromesh is equivalent. I think castrol makes some equivalent.

 

Yes its a manual, sorry!