400 000 miles is just a number, why retire your truck then if it's still going well? I'd keep mine to 1 million if I was to have no major problem or rust with it.
Cause i have a 05 that is real nice. The 98 is my work car and “I retire” next year, i wont need all the vehicles i now own. I drive a lot, which is why i own the 98. All those miles were put on just driving to work. I dont want the maint bills for a car with over 400,000 miles on it.