not sure what the tranny was that was used in 2004 but the tranny shop says it's used in a few cars other than nissan (volvo comes to mind). he said there's an uncorrectable design flaw and to expect to replace it again.... i don't own the titan anymore and i like my new chevy better. i had bout 4 Z's in my younger years. lots of fuel injection problems in the old days. FWIW, i'm done with nissan due to the tranny issue.