Hi

My transmission shifts quite hard from 2->3, 3->4. 1->2 is perfect. Downshifting (4->3 etc) is smooth and the shifting points is good. Kickdown also etc works fine. It shifts smoother when accelerating really slow.

I have measured the vacum going to the tranny:
At Idle: 11"Hg to tranny for prop. valve, (20"Hg from vacuum pump to IP prop. valve.)
Full throttle: 0"Hg (as expected)

Is 11"Hg of vacuum enough vacuum on a W124 diesel?
The vacuum pump is new and i found no vacuum leaks. The proportioning valve is adjusted for max vacuum to tranny.

Any toughts?