1. Verify that the joint shaft is not twisted or cracked.
2. Turn the joint shaft by hand and verify that the bearing rotates smoothly and freely.

Drive shaft
Joint shaft removal/installationMazda 6 Service Manual: Programming the HomeLink System
CAUTION
When programming a garage door opener or a gate, disconnect the power to these
devices before performing programming. Continuous operation of the devices could
damage the motor.
The HomeLink system provides 3 buttons which can be individually selected and
programmed using the transmi ...
Mazda 6 Service Manual: Automatic Transaxle Controls
Various Lockouts:
Indicates that you must depress the brake
pedal and hold in the lock-release button to shift (The ignition must be switched
ON).
Indicates the shift lever can be shifted
freely into any position.
Indicates that you must hold in the lock-release
button to shift.
N ...