The car was upshifting fine cold. Once the box warmed up, 2 to 3 would land with a clear kick, worse in Sport mode. That pattern points at adaptation, not a mechanical fault, so the box gets a chance before anything bigger.

The ZF box has five clutch packs, A through E, and each gear engages a combination of them. The module stores two learned values per clutch. Fill pressure is the extra pressure it adds on engagement to correct for wear and friction.

Rapid fill time is how long it pre-fills the clutch with oil before the pressure ramps, so there is no slop before it grabs. Two independent sets, five values each. As clutches wear and oil ages they drift, and when one goes extreme the module is fighting to keep the shift smooth. You feel that fight as the kick.

Transmission control unit, transmission clutch adaptations menu. Two options: read values, reset values. Read first. On this car:

• Fill pressures: A 8.00, B 20.00, C -102.00, D 390.00, E -363.00
• Rapid fill times: A 33.00, B 21.00, C 0.00, D 0.00, E 47.00

Clutch C, D and E fill pressures sat a long way from A and B, the module compensating hard on the higher clutches. That lines up with the shift that was misbehaving.

Select reset adaptation values. The tool warns it resets in the next step, confirm, and you get "saved successfully." No coding, no flashing. The module is back to zero and relearns as you drive.

Drive normally so the module rebuilds its adaptations. I tested in Sport on purpose, that is where the kick was worst. Half an hour, no kicks. Did not expect the reset alone to do it after the oil change had not, but the shift came back clean.

A reset is not a permanent fix if the cause is real wear. If the clutches are genuinely worn the values drift back out and the kick returns. For now, after the oil and the reset, it shifts clean.