I have found on relatively short flights with low gross weight the autopilot is not able to stabilize at 320 kts in climb above 10,000 ft in VNAV. I get oscillations between 1000-6000 fpm as it tries to maintain 320 kts and the speed sometimes drops to 300 kts. The EPR climb setting was pretty high, >.700.
I have assigned a button on my joystick to ‘Autopilot off’, ‘Set autopilot disengage’ and ‘toggle disengage autopilot’ but none are able to activate the autopilot disengage button on the yoke. Having to grab your mouse, look down and find the button on the yoke is annoying especially on busy and fast approaches.