I've noticed that on my new 08 that the RPMs are much lower (well below 2k RPM) while cruising around between 40-45 MPH than my 04 Titan with the same gearing and all. It seems the torque converter locks up much sooner and stays locked longer...or maybe its just finding 5th sooner and staying there, I don't know. My 04 would never stay below 2k RPM...even cruising at those speeds. Have any of you 08 owners who've had earlier Titans noticed this? I'm wondering if mileage will be a little better because of it.