[kingof_boggle]

1990 W250 with 5spd. what should i be using?

before i get flamed for the "search" function, i searched "diff fluid" and got 11 pages and went through every one. so much conflicting information. some say 75w90, some say 80w90. what do the 1st gen experts use?

 

[kingof_boggle]

thanks 5.9fan. i appreciate the prompt response. i dont have any owners literature so i couldn't check.

 

[kingof_boggle]

topped up with 80/90 last night because i had the axles out for parking brake cable replacement. everything is fine now but i couldn't believe the hack macguyver job the last guy did on my truck before i bought it. so i guess he fugged up the lever that the cables attach to inside the drum....on both sides so he dicided to WELD the cables to the lever in a taco-shell shaped 3/8" sleeve! ridiculous.
anyways, the diff took a full litre of fluid after the axles went back in. drove fine, no noise. thanks again guys.