For 1990-2009 cars

Condition | Possible Cause
--- | ---
No engine braking or 3-2-1 manual downshift |

• | Shift select cable out of adjustment, binding or damaged

• | Manual valve binding or sticking

• | 2-3 shift valve binding or sticking

• | 1-2 shift valve binding or sticking

• | Primary regulator valve binding or sticking

• | Broken or distorted valve springs

• | Damaged or porous valve body casting

• | Intermediate servo piston binding or sticking

• | Intermediate servo piston seals cut or damaged

• | Intermediate servo piston rod binding

• | 2nd brake band worn or out of adjustment

• | 1st-reverse brake clutch discs worn

• | 1st-reverse brake piston or seal leaking or damaged

• | One-way clutch not holding or damaged