Ok, hopped in my truck today to go to work, it's a 03 ext cab Z71, 5.3 V8. driving to the gas station about two blocks from home, get a pop, head to work, pulling out I notice it is reving a little before going into first, then I hop on the hwy and get to 55, I get stuck behind a damn farmer doing 35 in his 60's rust bucket, go to pass, revs to 6000 and then takes off...I dont know what the hell is going on or what the hell the best/ cheapest route is. I have been thinking the transmission/ transfer case, but how can I pin it down, should I have it rebuilt or buy a used 30K tranny? I am worried this is going to cause me to get straned somewhere and I will end up needing a tow.. Any help on the type of tranny I have, possibiltys of repair and cause are greatly appreciated. How much should I be looking to spend on a used tranny or a re-build?