For 1990-2009 cars

#### No 3-4 Shift/Slipping or Rough 3-4 Shift

Checks | Causes
--- | ---
Oil Pump Assembly (4) |

• | Pump cover retainer and ball assembly omitted or damaged

• | Faces not flat

Valve Body Assembly (60) |

• | Valves stuck

- | 2-3 Shift valve train

- | Accumulator valve

- | 1-2 Shift valve train

• | Spacer plate or gaskets incorrect, mispositioned or damaged

2-4 Servo Assembly (13-28) |

• | Incorrect band apply pin

• | Missing or damaged servo seals

• | Porosity in piston, cover or case

• | Damaged piston seal grooves

• | Plugged or missing orifice cup plug

Case (103) |

• | 3rd Accumulator retainer and ball assembly leaking

• | Porosity in 3-4 accumulator piston or bore

• | 3-4 Accumulator piston seal or seal grooves damaged

• | Plugged or missing orifice cup plug

• | Restricted oil passage

Input Housing Assembly (621) | Refer to No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting .
2-4 Band Assembly (602) | Worn or misassembled