The Eagle AXS Transmission pairing process is the same as Eagle AXS Drivetrain and AXS road systems. The derailleur begins and ends the pairing session.
You can see a video showing this process here, or to see a video showing how to pair your Eagle AXS Transmission with an AXS Reverb post, check out this video!
1. Press and hold the AXS button on the derailleur until the AXS LED blinks slowly, then release.
2. Press and hold the AXS button on the controller until the green LED blinks quickly, then release.
3. Press and release the AXS button on the derailleur to end the pairing session or wait 30 seconds for the session to time out. The AXS LED will stop blinking.
NOTE: Pair the right controller first for setups using two AXS controllers. If more than one controller (e.g. Reverb AXS or Left Flight Attendant) is paired into the system, the one paired first into the system will work as the default right one and be shown as right in the app.
(link to pairing video)