[QUOTE=silver lab;3692756]I could be wrong but I thought the 03 had the 47re. It was told to me that the 48re didn't come out until 2004.5.
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Not quite correct. 2003.5 came with a 48re. Earlier versions came with the 47re. I had a 2003.5 for years with the 48re.
Check out cumminsforum.com and do a search. you'll be able to find what transmission is in the truck based on VIN numbers.
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