Strong Gearshift Jerk In 4-3 Downshift

CAUSE/REMEDY:
1. Check T-form ring of brake band piston B2.
2. Check installed position and condition of radial seal ring in transmission housing behind piston B2.
3. Check release clearance of Brake band B2. Adjust to minimum specification of 5.0 - 5.5 mm.
4. Reaction valve Rv2 has twisted. Replace reaction valve.