2002 dodge 4.7, Trans and Transfer case

Just some info to help with the sale. That engine will have the 16 tooth tone ring in it, and like you said....will only work with a 3 plug ECM. Starting sometime in 2003, 4.7's switched to a 32 tooth tone ring that is only compatible with a 4 plug ECM. I've gotten to know more than I ever wanted to about 4.7's after I bought a dirt cheap, cherry 2004 quad cab Dakota with a bad engine! Good luck with the sale.