I'm looking at buying a 2000 Ram 1500 with an automatic transmission. The truck has been used for plowing in the past, and I would continue to plow with it. I have heard that many dodge transmissions fail, for example, I know a guy with a '96 Ram thats on its third transmission. This truck I'm looking at has 97,000 miles on it now, so how much longer before I could expect having to have the trans. rebuilt?