Shift Concerns: Timing - Early/Late

SHIFT CONCERNS: TIMING - EARLY/LATE - DIAGNOSTIC ROUTINES

Possible Component	Reference/Action
211 - ELECTRICAL ROUTINE
Powertrain Control System
Electrical inputs/outputs, vehicle wiring harnesses, PCM, Shift Solenoid A (SSA), Shift Solenoid B (SSB), Shift Solenoid C (SSC), Shift Solenoid D (SSD), Shift Solenoid E (SSE), Throttle Position (TP) sensor, Mass Air Flow (MAF) sensor, Output Shaft Speed (OSS) sensor, Intake Air Temperature (IAT) sensor, Engine Coolant Temperature (ECT) sensor, Transmission Fluid Temperature (TFT) sensor, Turbine Shaft Speed (TSS) sensor, internal wire harness, Line Pressure Control (LPC) solenoid	Run On-Board Diagnostic (OBD). Refer to INTRODUCTION - GASOLINE MODELS for diagnosis. Go To PINPOINT TEST A , Go To PINPOINT TEST B and Go To PINPOINT TEST C .
	Carry out Shift Point Road Test. Refer to SHIFT POINT ROAD TEST and carry out Torque Converter Operation Test. Refer to TORQUE CONVERTER DIAGNOSIS .
Solenoid Body
Incorrect solenoid body strategy data stored in the PCM	Verify solenoid body strategy data stored in the PCM, download new identification and strategy as necessary. Refer to SOLENOID BODY STRATEGY .
311 - HYDRAULIC/MECHANICAL ROUTINE
Other
Tire size	See the specification decal and verify vehicle has original equipment. Changes in tire size will affect shift timing.
Transmission Fluid Level
Low transmission fluid level	Check transmission fluid level and adjust as necessary. Refer to PRELIMINARY INSPECTION .
Transmission fluid condition	Carry out transmission fluid condition check. Refer to PRELIMINARY INSPECTION .
Selector Lever Linkage (Internal/External)
Damaged, out of adjustment	Inspect for damage. Repair as required. Verify selector lever cable adjustment. Refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS .
Main Controls
Plugged solenoid body filter	Inspect for damage. Install new as required.
Bolts out of torque specification	Tighten bolts to specification.
Gaskets and separator plate - damaged, off location	Inspect for damage. Install new as required.
Valves, accumulators, seals, springs, clips, check balls - damaged, missing, misassembled	Inspect for damage. Repair as required.
	See the appropriate shift concern and routine for further diagnosis: Shift Concern: Soft/Slipping 1-2, Routine 230/330 Shift Concern: Soft/Slipping 2-3, Routine 231/331 Shift Concern: Soft/Slipping 3-4, Routine 232/332 Shift Concern: Soft/Slipping 4-5, Routine 233/333 Shift Concern: Soft/Slipping 5-6, Routine 234/334 Shift Concern: Soft/Slipping 6-5, Routine 235/335 Shift Concern: Soft/Slipping 5-4, Routine 236/336 Shift Concern: Soft/Slipping 4-3, Routine 237/337 Shift Concern: Soft/Slipping 3-2, Routine 238/338 Shift Concern: Soft/Slipping 2-1, Routine 239/339
End Cover
End cover gasket - leaking	Inspect for damage. Repair or install new as required.
Planetary Gear Sets
Damaged	Inspect for damage. Repair or install new as required.
One-Way Clutch (OWC) Assembly
Damaged	Inspect for damage. Repair or install new as required.
Other Components
Clutches	Inspect for damage. Repair or install new as required.
Output shaft (differential)	Inspect for damage. Repair or install new as required.
Powerflow components	Inspect for damage. Repair as required.
Vehicle Speed Input
Insufficient, erratic or no input received by the PCM from the OSS or TSS sensors	Inspect for damage. Repair as required. Go To PINPOINT TEST C .
Transmission Fluid Filter and Seal Assembly
Plugged, damaged, not correctly seated	Inspect for damage. Install a new filter and seal assembly.
Filter, seal - damaged	Inspect for damage. Install a new filter and seal assembly.