5/6/7 Speeds - Retrofit
#1
#2
Join Date: May 2004
Location: Georgia on my mind...
Posts: 6,509
Likes: 0
Received 6 Likes
on
5 Posts
Not easily, no. The 6 speeds have dedicated transmission control modules and harnesses, which would probably swap in just fine and dandy, but your '03 PCM might think something is seriously wrong when it no longer sees any transmission values because the 6 speed's TCM is running the show now.