I've had it with this 904, about to give up!

Is the throttle pressure rod adjusted right? The rod must move as soon as the throttle moves. Did you set the pressure adjustment on the valve body per Trans Go's instructions. What are the clearances on the clutch drums? Were the drum seals replaced correctly? Did you adjust the bands correctly?

The accumulator spring holds the piston in the right place. The shifts are cushioned by hydraulic's. Removing the spring and putting in a rod won't fix the flairs. Check the pressure's and keep us filled in. Someone here will figure it out.