When the gear is retracted right after take-off, the 340's nose jumps up a few degrees in pitch. Pitch trim was calculated by the EFB with the correct numbers (1/4.9UP).I understand that because of a gear retraction/extension the CG changes slighty forward/backward, but not in 0.5 seconds.

Also during takeoff-rotation, it is hard to bring the nose up gently. I tried different sensitivities on the joystick, tried to mess around with different payloads/Trims/FLEX/Flaps etc... nothing realy helps.

Once airborne, the joystick feeling is ok.
I have seen posts on this before... Just wanna bring it up again in case this issue is linked.

 

Apperently it has nothing to do with the gear retraction. At every takeoff when airborne a few 100 feet, the elevator (not trim) jumps up, resulting in a unrealistic nose up jump. I found out that when you keep a little pressure (forward or backward, depends on the situation) makes this event not happening. If your stick remains neutral, I get this nose up jump every time. Also when engaging the autopilot (spot on the FD cross) the nose tends to jump. In some other descend situations where you change modes VNAV to LVLchange or the other way around... again... nose bounce...