Had to take a work truck in to get a tranny rebuild today. It has 175000 miles on it. Just because I was curious I asked about my 80 and how many they have rebuilt. He said a few and they all typically have 180,000 miles. Mine has close to 300,000 on the original tranny and mine is obviously used much harder than the average truck. Curious how many miles the average 80 goes before needing a rebuild.