Hi all ..

planing to change some fluids, front, rear def and the transmission here is some info

5speed Nv3550
Corporate 8.25 Rear Axle
Dana 30/181MM Front Axle

what is the number of the oil i should use?

some people told me for the transmission only use mopar , my problem is when the trans cold hard to shift to 2nd and 3rd gear after driving for 30-40 miles it become a bit smoother but not that smooth . (i think the po use mopar so is there a problem if i try Royal Purple ? or Red Line ?
any ideas

no any problem with the def but i well do them while doing the transmission.
Thanks