Just got my 1.5ton 40 firebolt running after 5years of on and off again engine rebuilding and other work.
Currently , I am using 80w90 Gear oil in the transmission. A four speed (L,1,2,H and reverse). If someone can verify this as a good choice or recommend a better alternative I would greatly appreciate it, as well as a suggestion for the power steering fluid. Everything is still original and the charging system (an old 6volt still works great. Needless to say I am totally thrilled.
Thanks, Norm