Mazda 6 Service Manual: No.19 excessive shift shock on torque converter clutch (tcc)

No.18 excessive shift shock is felt when upshifting and downshifting

No.20 noise occurs at idle when vehicle is stopped in all positions/ranges

Other materials:

Mazda 6 Service Manual: Manual Transaxle Shift Pattern
  The shift pattern of the transaxle is conventional, as shown. Depress the clutch pedal all the way down while shifting; then release it slowly. Your vehicle is equipped with a device to prevent shifting to R (reverse) by mistake. Push the shift lever downward and shift to R.   ...

Mazda 6 Service Manual: Liftgate side trim removal/installation
1. Remove the liftgate upper trim. 2. Position the strap hanger as shown in the figure. 3. Pull the liftgate side trim toward you, then disengage clips A, pin B and the strap hanger from the body and pin B, hook C, D from the liftgate lower trim. 4. Remove the liftgate side trim. 5. Remo ...