Had my 2500 for 3yrs try took a dump on me around 180thousand miles. I changed the oil every 3000 miles. In them three years i was hard on her, haulen cattle to 1 ton bails. And most was in muddy terrain where i should have been usen a tractor
But when the tranny goes make sure that you find a good shop, the one that did mine sucked
Been through 5 trannys now, cause the shop never replaced or flused the raditor. If you keep up on maintance and get a good temp gauge she'll do you right, oh and a shift kit.