I use 90-140 weight in my tranny. It says in shop manual to remove square headed pipe plug and lubricatethe universal joint bearings through the opening and replace plug. Fill transmission with 1 1/2 pints of fluid. I can't find where they actually say to fill main tranny body in book, I assume it has a plug somewhere on side to fill it. It just says to fill to just below plug hole. Usually you stick your finger in hole and you can feel oil. smile