[hew]

This does not happen on jacks with the test rig. It also does not happen on gear extension. It happen during climb, usually full power, haven't tried reduced power. Suggests to me three possibilities. 1. Not enough pressure from the pumps but I have two of them. 2. Something in the power pack. 3. The snubbing valve on the main gear actuator needs adjusting.
If anyone else has had a similar problem we might know where to start looking.