Shift Concerns: 4-3 Shift (Automatic)

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

SHIFT CONCERNS - 4-3 SHIFT (AUTOMATIC)

Possible Component	Reference/Action
223 - ELECTRICAL ROUTINE
Powertrain Control System
Electrical inputs/outputs, vehicle wiring harnesses, PCM, shift solenoids, transmission control switch (TCS)	Carry out self-test. Refer to the INTRODUCTION - GASOLINE article for diagnosis and testing of the Powertrain Control System. GO to PINPOINT TEST A . Repair as required. Clear DTCs, road test and repeat self-test.
323 - HYDRAULIC/MECHANICAL ROUTINE
Incorrect Pressures
Forward clutch pressure, line pressure	Check line and forward clutch at pressure taps; refer to LINE PRESSURE CHART for specifications. If out of specification, check the main controls.
Main Controls
3-4 shift valve, solenoid pressure regulator valve, OD servo regulator, 3-4 capacity modulator, 1-2 and 2-3 shift valves stuck, damaged or assembled incorrectly	Inspect for damage. Repair as required.
Check balls No. 2, No. 7, No. 9 damaged, missing or not seating correctly	Inspect for damage. Repair as required.
Bolts not tightened to specifications	Tighten bolts to specification.
SSA malfunction	Activate solenoid using diagnostic tool. If solenoid operation cannot be felt when placing hand on solenoid, install a new solenoid. Inspect O-rings for damage. Repair as required.
Gaskets damaged	Inspect for damage and install a new gasket.
OD servo, seal, rod damaged	Inspect for damage. Repair as required.
Solenoid screen blocked or damaged	Clean or install a new screen.
Pump
Porosity/cross leaks, balls missing, damaged or leaking	Inspect for porosity/leaks, balls missing. Install a new pump as required.
Seal rings damaged	Inspect for damage. Repair as required.
Gaskets damaged	Inspect for damage and install a new gasket.
Overdrive Band
OD band and reverse clutch assembly damaged, worn or assembled incorrectly	Inspect for damage. Repair as required.
Intermediate one-way clutch assembly damaged	Inspect for damage. Repair as required.
Forward Clutch Assembly
Seals or piston damaged	Inspect for damage. Repair as required.
Friction elements damaged, worn	Inspect for damage. Repair as required.
Check ball stuck, damaged or not seating correctly	Inspect for damage. Repair as required.
Forward clutch piston and return spring damaged	Inspect for damage. Repair as required.
Input Shaft
Seals damaged	Inspect for damage. Repair as required.