Next week i'm taking the durango to the tranny shop and having them change the filter and fluid out of the 44re, i will be putting in royal purple max atf multi spec, and idk what filter yet, i belive i need to get 5 quarts of the tranny fluid for just doing a pan drop, and then i'm going to be having them change the rear end fluid, i'll be getting royal purple max gear 80w-90, now how much do i have to get for my rear end ? and how do i find out if my rear end is a 8 1/4 or a 9 1/4 ? Also how do i know if i have the traclock soo i will have to get that friction addative? Then i'm gonna be putting royal purple fluid in the transfer case, idk which stuff i put in that or how much?? Did i leave anything else out to change the fluids ? besides my motor which i just run penzoil high mileage motor oil cause i have 180k on her. I'm getting all this done for $150 not including the fluids and the filter and gaskets. Oh i forgot the royal purple max gear, has the friction modifier in it allready.