Diagnostic Routine 234/334 - Shift Concerns: Harsh 3-4 Shift (Automatic)

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.

SHIFT CONCERNS: HARSH 3-4 SHIFT (AUTOMATIC)

Possible Component	Reference/Action
234 - ELECTRICAL ROUTINE
No Electrical Concerns
334- HYDRAULIC/MECHANICAL ROUTINE
Overdrive Servo Assembly
Apply Rod - incorrect	Inspect. Install new if incorrect.
Return Spring Retaining Clip - broken, missing	Inspect for damage. Install new as required.
Main Control
Bolts out of torque specification	Tighten bolts to specification.
Gaskets and Separator Plate - damaged, off location	Inspect for damage. Install new as required.
3-4 Shift Valve, Line Modulator Valve, Forward Clutch Control Valve - stuck, damaged	Inspect. Repair as required.
3-4 Accumulator Assembly
Accumulator Piston - stuck, damaged	Inspect for damage. Install new as required.
Piston Seals - damaged	Inspect for damage. Install new as required.
Springs - damaged, missing	Inspect for damage. Install new as required.
Rod or Bore - damaged	Inspect for damage. Repair as required.
OD Band
OD Band - damaged, worn, misassembled	Inspect for damage. Install new as required.