Shift Concerns: Harsh 4-3 Shift Only (Automatic)

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

SHIFT CONCERNS: HARSH 4-3 SHIFT ONLY (AUTOMATIC)

Possible Component	Reference/Action
235 - ELECTRICAL ROUTINE
Powertrain Control System	-
Electrical inputs/outputs, vehicle wiring harnesses, powertrain control module, electronic pressure control (EPC) solenoid, transmission range (TR) sensor, 3-2T/CCS, transmission fluid temperature (TFT) sensor, OSS, TSS, throttle position sensor, mass air flow sensor, TCC solenoid	Run On-Board Diagnostics Tests. Refer to INTRODUCTION - GASOLINE . GO to PINPOINT TEST B , GO to PINPOINT TEST C , GO to PINPOINT TEST D , GO to PINPOINT TEST E , GO to PINPOINT TEST F and GO to PINPOINT TEST G .
335 - HYDRAULIC/MECHANICAL ROUTINE
Main Control	-
Bolts out of torque specification	Adjust bolts to specification.
Gasket leaks	Inspect for damage. Repair as necessary.
Servo release shuttle valve, 3-2 timing/coast valve stuck, damaged or misassembled	Inspect for damage. Repair as necessary.
Hydraulic passages damaged	Inspect for damage. Repair as necessary.
Separator plates damaged, blocked	Inspect for damage. Repair as necessary.
Pump Assembly	-
Bolts out of torque specification	Adjust bolts to specification.
Porosity/cross leaks, seal rings damaged, missing or leaking ball plug	Inspect for damage. Repair as necessary.
Gasket damaged	Inspect for damage. Repair as necessary.
Pump support seal rings No. 2, No. 3, No. 4 or No. 5 (coast and direct clutch circuits) damaged	Inspect for damage. Repair as necessary.
Intermediate/Overdrive Band and Servo Assembly	-
Servo rod bent, damaged	Inspect for damage. Repair as necessary.
Servo return spring broken	Inspect for damage. Repair as necessary.
Coast Clutch Assembly	-
Seals damaged, missing	Inspect for damage. Repair as necessary.
Piston damaged	Inspect for damage. Repair as necessary.
Friction elements worn, damaged	Inspect for damage. Repair as necessary.
Check ball not functioning	Inspect for damage. Repair as necessary.
Forward clutch piston and return spring damaged	Inspect for damage. Repair as necessary.
Case	-
Porosity/cross leaks in servo apply, servo release, direct clutch, coast clutch circuits	Inspect for damage. Carry out Air Pressure Test. Repair as necessary.