Rebuilt A998 - No upshift/only 1st gear

I wired up a tachometer and did some more testing.

With selector in 1st gear at 1000rpm:
Line pressure was 32psi with throttle lever all the way forward, 80psi with throttle lever all the way rearward.
Rear servo pressure was 32psi with throttle lever all the way forward, 73 psi with throttle lever all the way rearward.

With selector in 2nd gear at 1000rpm:
Line pressure was 52psi with throttle lever all the way forward, 88psi with throttle lever all the way rearward.

With selector in Drive at 1600rpm:
Line pressure was 55psi with throttle lever all the way forward, 90psi with throttle lever all the way rearward.

With selector in Reverse at 1600rpm:
Rear servo pressure was 150psi with throttle lever all the way forward. When I pulled the throttle lever rearwards the pressure peaked to 160psi but dropped and stabilized at 150psi.

So, what´s my next step?