After researching found out the 02 and some 03s have the 45RFE trans,and it is said to be more heavy duty and better than the 42RLE.I don't know,just throwing out what I've read and someone that knows more than me could respond.
I changed the oil and being a big fan of synthetic oils,went with the castrol edge full synthetic.So far put right at 800 miles on it,with brother putting 600 of it last week going to doctor appointments.It sure runs great and nice and smooth,and right at 20mpg.
Glad boondocker brought up the Firestone Destination tires,as been looking at tires and narrowed it down to #1 the destinations,#2 courser ats. The wranglers on it should last till fall so I do have time to look at more,but leaning very hard for the destination tires as they keep being mentioned and most are very happy with them.