Diagnostic Routine 228/328 - Shift Concerns: Soft/Slipping 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: SOFT/SLIPPING 3-4 SHIFT (AUTOMATIC)

Possible Component	Reference/Action
228- ELECTRICAL ROUTINE
No Electrical Concerns
328 HYDRAULIC/MECHANICAL ROUTINE
Overdrive Servo Assembly
Apply Rod - damaged	Inspect. Install new if incorrect.
Servo Bore or Piston - damaged	Inspect for damage. Repair as required.
Piston Seals - damaged, 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, missing	Inspect for damage. Install new as required.
Springs - damaged	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.