Shift Concerns: Timing Concerns - Erratic/Hunting

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 - ERRATIC/HUNTING

Possible Component	Reference/Action
212 - ELECTRICAL ROUTINE
Powertrain Control System
Electrical inputs/outputs, vehicle wiring harnesses, PCM, shift solenoids, torque converter clutch (TCC) solenoid, digital TR sensor, output shaft speed (OSS)	Carry out self-test. Refer to the INTRODUCTION - GASOLINE article for diagnosis. 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.
Poor engine performance	Refer to Routine 253.
312 - HYDRAULIC/MECHANICAL ROUTINE
Fluid
Incorrect level	Adjust fluid to correct level.
Condition	Inspect condition of fluid.
Main Controls
Valves, accumulators, seals, assembled wrong, stuck or damaged	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.
Torque Converter Clutch
Torque converter	Refer to Torque Converter Operation Concerns: Cycling/Shudder/Chatter Hydraulic/Mechanical Routine 342.
Specific Shifts
	Refer to the following 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