Symptom: Feels like there is a slight vibration under light acceleration, right before the transmission shifts.
Verification: In your scan tool, use the Live Data function and select the following parameters to graph.
- Engine Speed
Input Shaft (Mainshaft) Speed
Output Shaft (Countershaft) Speed
Throttle Position sensor 1
Start your Flight recording function, and then drive under light steady acceleration conditions.
Solution: The first step to fixing is to drain and refill Automatic Transmission Fluid with factory Honda ATF twice! After the first drain and refill drive and then repeat. If the issue persists or returns, replace the torque converter from Honda.