I want to change the rear differential fluid & swap cover on my 04 chevy express 3500 2 wheel drive.there is no drain plug or fill plug on pumkin just a fill on the cover.
this is a 8200LB RV van, I will only elevate the rear so I won't know when she's full. when all 4 tires are on the ground an level she's to low to crawl under her to observe fluid coming out of fill hole.
whats the rear differential fluid capacity of STD70 I believe it's referred to as a dana super 70.
I think it's a 10.5" an has 12 bolts holding cover on.

plan to use no gasket just grey premetex bc I'm not exactly sure of what gasket to order rockauto has a bunch to choose from.some w/ 14 bolts some w/ 10 since mine has 12 think I'll pass of the gasket which would make this nasty job easier. I say nasty bc theres a generater where the spare tire usalley is there's about 2" of clearance it is tight.

I'd like to pump in the exact amount while the rear is eleavated. I think she takes 4 quarts which seams excessive. thanks for advise