Re: C6 problem!

The 2 - 3 shift uses 2 components.

Intermediate band and direct clutch.

If either are worn it can cause this.

Adjust the intermediate band.
Loosen the lock nut, hold the adjuster screw and back the lock nut off a few turns.
Tighten the adjuster to 10' pounds.
Back it off one full turn.
Hold the adjuster screw and tighten the lock nut.

If it still slips the direct clutch could be worn.