77 F150 rebuild

[skywarrior]

My first Ford F150 was a 76 I took it to Adak Ak in 75 and drove it for 2 years then took it back stateside. I recently got a 77 F150 and rebuilt the 351m engine drove it a while then the transmission stopped working, having it rebuilt. when I took off the transfer case the oil leaked out of the transfer case . My Hines manual doesn't say what kind or how much oil it takes. Searched online but found several different answers. Any help would be greatly appreciated.

 

[Fellro]

It depends on which transfer case you have. NP205 (cast casing) for 1976 uses 50w, 78 and later 80w-90 gear oil, NP203 (aluminum case) uses 30w or 50w depending on your temperature range.