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Shift Concerns: Soft/Slip 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: SOFT/SLIP 4-3 SHIFT ONLY (AUTOMATIC)

Possible Component Reference/Action
229 - ELECTRICAL ROUTINE 
Powertrain Control System  -
  • Electrical inputs/outputs, vehicle wiring harnesses, powertrain control module, EPC solenoid, output shaft speed sensor, mass air flow sensor, throttle position sensor
329 - 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, main regulator valve stuck, damaged or misassembled
  • Inspect for damage. Repair as necessary.
  • Hydraulic passages damaged
  • Inspect for damage. Repair as necessary.
  • Pressure tap plate/gasket leaks or damage
  • Inspect for damage. Repair as necessary.
  • Separator plates damaged, blocked
  • Inspect for damage. Repair as necessary.
Intermediate/Overdrive Band and Servo Assembly  -
  • Intermediate overdrive band and reverse clutch drum assembly worn, damaged or misassembled
  • Inspect for damage. Repair as necessary.
  • Servo return spring broken
  • Inspect for damage. Repair as necessary.
  • Servo rod damaged
  • Inspect for damage. Repair as necessary.
  • Piston seal damaged
  • Inspect for damage. Repair as necessary.
Direct Clutch Assembly  -
-
  • Carry out Air Pressure Test.
  • Seals damaged, missing
  • Inspect for damage. Repair as necessary.
  • Piston damaged
  • Inspect for damage. Repair as necessary.
  • Check ball damaged, missing or leaking
  • Inspect for damage. Repair as necessary.
  • Return spring damaged
  • Inspect for damage. Repair as necessary.
  • Friction elements damaged
  • Inspect for damage. Repair as necessary.
Forward/Coast Clutch Assembly  -
-
  • Carry out Air Pressure Test.
  • 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 circuits
  • Inspect for damage. Carry out Air Pressure Test. Repair as necessary.
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