I am looking at 3500 trucks and found one that I really like, but just found out it is likely that the transmission has never been serviced. Since the interval is 30,000 miles, this has me a little concerned. The oil change history is fantastic and was always done at the dealership, so I doubt this guy was servicing the trans on his own. How bad is this? Reason to walk away? Not sure I really even need the Aisin for what I'm doing- which will mainly be loading the truck down with a 3500 lb truck camper in the bed, and then pulling a couple thousand pounds with a side by side on the trailer. I appreciate any input on any of this! Thanks!