[Mike Pearson]

If the trans fluid and band adjustment are good I would look for some electrical gremlins. Bad grounds can cause may crazy things with electronics. Bare wires. loose connections, too many wires routed next to each other. Check your shifter adjustment to make sure it is properly adjusted. I usually check mine in high gear. Check all of the gears to make sure the right shift arm is on the trans for your shifter. Disconnect the throttle stop and make some runs to see how it acts. also remove any high RPM chips from the rev limiter.,