Hey guys I have an the above Van, it been been reluctant to shift into 4th when cold now takes 60 kms road speed plus and above 3,300 RPM for it to change up to 4th Gear. I've serviced Auto Trans with a new filter kit and fresh oil several times during my ownership . I've tried adjusting the it via the kick down cable linked to the throttle to no avail. I assume the would have used the same auto on other models in the line up at the same time. Any suggestions Thanks In advance.....