My 04 Cummins had a "rusted" driveshaft within a few months of ownership. That really bothered me to look under the truck and see this rusty shaft. On my new 05, I wiped it down with thinner and shot the complete driveshaft with a few coats of satin black Rustolium spray paint before the rust started. It sure looks alot better under there! I also feel alot better knowing my driveshaft isnt going to rust in 1/2 in the next few years! Just one of my ideas to keep the truck a bit nicer for a few years. 
