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Shift Concerns: No 3-4 Shift (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: NO 3-4 SHIFT (AUTOMATIC)

Possible Component Reference/Action
222 - ELECTRICAL ROUTINE 
Powertrain Control System  -
  • Electrical inputs/outputs, vehicle wiring harnesses, powertrain control module, shift solenoids, transmission range (TR) sensor, transmission control switch (TCS)
322 - HYDRAULIC/MECHANICAL ROUTINE 
Incorrect Pressures  -
  • Line pressure
  • Check pressure at line tap. Carry out Line Pressure Tests. Refer to SPECIAL TESTING PROCEDURES . If out of specification, check Main Control.
Main Control  -
  • Bolts out of torque specification
  • Adjust bolts to specification.
  • Gasket leaks
  • Inspect for damage. Repair as necessary.
  • 3-4 shift valve, main regulator valve stuck, damaged or misassembled
  • Inspect for damage. Repair as necessary.
  • SSA not functioning correctly (also no 1st)
  • Activate solenoid using the Transmission Tester. Repair as necessary.
  • Separator plates damaged or orifice blocked
  • Inspect for damage. Repair as necessary.
Intermediate/Overdrive Band and Servo Assembly  -
  • Intermediate overdrive band damaged, worn
  • Inspect for damage. Repair as necessary.
  • Servo rod or rod bore damaged
  • Inspect for damage. Repair as necessary.
  • Servo piston or cover damaged or leaking
  • Inspect for damage. Repair as necessary.
  • Springs damaged
  • 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 severely damaged, worn
  • Inspect for damage. Repair as necessary.
  • Check ball severely damaged
  • Inspect for damage. Repair as necessary.
Forward One-Way Clutch Assembly  -
  • Damaged
  • Inspect for damage. Repair as necessary.
Case  -
  • Band anchor damaged
  • Inspect for damage. Carry out Air Pressure Tests.
  • Servo apply and servo release circuits leaking
  • Inspect for damage. Repair as required.
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