from what you describe it sounds like an issue i had a few years ago. turned out to be the TPS (throttle position sensor) put a new one in and all was wonderful in shifting land.

but, that should throw a code. if the passport has no codes - probably isn't that


'99 Rodeo V6 4x4 w/ 8" lift, 33" TrXus MT
4.77, Aussie Locked rear, 8500lb winch, custom rack, custom winch bumper, ProComp lights, 230,000km
http://www.cardomain.com/ride/2231794