in a nut shell i just traded in ol faithful the 99 7.3 for a 2008 6.4 with 18,000 miles. had 350,000 miles on the old truck. between repairs and this forum i knew that truck like the back of my hand. Question for everyone is what should i know about my recent purchase? i got a 4 year 75,000 warranty that i doubt ill be able to make with a stock truck. any info on mods/ problems with this truck i appreciate.