What should I do with the trans fluid???
 

Quick question, here's the scenario:

03 SCREW 4x4, 3.79 LS. Just put 35's and a 3" body lift. I will be adding an EDGE shortly. The truck has 83,000 miles and I have a suspision that the trans fluid has never been changed. Everything is fine with the trans, but would you guys just do a pan drop or would you change out all the fluid? I was thinking about just dropping the pan because I won't be pulling more than 1500 lbs and that will be very rare. With the lift and the tires though, would it be best to change all the fluid?

Thanks.