I have an 01' 5.4l with 150k. The other day my check engine light came on and when checked by autozone it came up as a P1740. I looked it up and it says transmission issues. Any ideas on this subject? I just changed the oil and filter about 2k miles ago. When I did I added a conditioner. The truck does not feel any different, but I don't want to wait till the last minute then have to replace a tranny.