Shift Concerns: Timing Concerns - Early/Late

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 - TIMING CONCERNS - EARLY/LATE

Possible Component	Reference/Action
211 - ELECTRICAL ROUTINE
Powertrain Control System
Electrical inputs/outputs, vehicle wiring harnesses, PCM, shift solenoids, EPC solenoid, TFT sensor, OSS	Carry out self-test. Refer to the INTRODUCTION - GASOLINE article for diagnosis and testing of the Powertrain Control System. GO to PINPOINT TEST A , GO to PINPOINT TEST C or GO to PINPOINT TEST E . Repair as required. Clear DTCs, road test and repeat self-test.
311 - HYDRAULIC/MECHANICAL ROUTINE
Other
Tire size change, axle ratio change	Verify vehicle has original equipment. Refer to Certification Label and Safety Standard Certification Label. Changes in tire size or axle ratio will affect shift timing.
Fluid
Incorrect level	Adjust fluid to correct level.
Condition	Inspect condition of fluid.
Powertrain Control System
Engine driveability concerns	Refer to Routine 253.
Incorrect Pressures
Line pressure, EPC pressure	Check pressure at line and EPC taps; refer to LINE PRESSURE CHART for specifications. If not OK, check the main controls. If OK, refer to the shift routine(s) for further diagnosis: Shift 1-2, Routine 320 Shift 2-3, Routine 321 Shift 3-4, Routine 322 Shift 4-3, Routine 323 Shift 3-2, Routine 324 Shift 2-1, Routine 325
Main Controls
EPC solenoid, stuck or damaged hydraulically or mechanically	Inspect for damage, contamination. Carry out EPC tests in Routine No. 211. Repair as required.
Valves, accumulators, seals stuck or damaged or assembled incorrectly	Inspect for damage. Repair as required.
Gaskets damaged	Inspect for damage and install a new gasket.
Solenoid screen blocked or damaged	Clean or install a new screen.