Harsh 5-3 Coast Downshift in Tow/Haul Mode or to Manual Third

WARNING: This page is about a different car, the 2011 Ford F550 Super Duty and 2011 Ford F450 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC ROUTINES - HARSH 5-3 COAST DOWNSHIFT IN TOW/HAUL MODE OR TO MANUAL THIRD

Possible Component	Reference/Action
247 - ROUTINE
Powertrain Control System	CARRY OUT On-Board Diagnostic (OBD) tests. REFER to the INTRODUCTION article for diagnosis and testing of the PCM. For diagnosing SSPCA , SSPCC , SSPCD and TCC solenoid, GO to PINPOINT TEST A . For diagnosing TFT sensor, GO to PINPOINT TEST B . For diagnosing TSS /intermediate shaft speed sensor, GO to PINPOINT TEST D . REPAIR as necessary. CLEAR the DTCs, ROAD TEST the vehicle and RERUN the OBD test.
PCM, vehicle wiring harnesses, transmission internal harness, Shift Solenoid Pressure Control A (SSPCA), Shift Solenoid Pressure Control C (SSPCC), Shift Solenoid Pressure Control D (SSPCD), Torque Converter Clutch (TCC) solenoid, Turbine Shaft Speed (TSS)/intermediate shaft speed sensors, Transmission Fluid Temperature (TFT) sensor, Power Take-Off (PTO) input
Transmission Fluid
Incorrect level	CHECK transmission fluid level and adjust as necessary. REFER to PRELIMINARY INSPECTION in this service information. CARRY OUT the Transmission Fluid Condition Check. REFER to PRELIMINARY INSPECTION in this service information.
Condition
Incorrect Line Pressures	CHECK pressure at line tap. CARRY OUT Line Pressure Test. REFER to SPECIAL TESTING PROCEDURES in this service information. FOLLOW the pressure diagnosis test as required.
High pressures
Solenoid Body Assembly
Bolts not tightened to specification	TIGHTEN to specification.
Filter gasket damaged	INSTALL a new filter gasket.
Contamination	DISASSEMBLE and CLEAN. If damaged or parts are missing, INSTALL a new solenoid body assembly. If misassembled, reassemble correctly.
SSPCA , SSPCC , SSPCD , TCC solenoid(s) damaged, stuck or bore damaged; manual valve damaged, stuck or bore damaged
Coast Clutch Assembly
Seals, piston damaged	REPAIR as necessary.
Friction elements damaged or worn	REPAIR as necessary. REPAIR as necessary.
Return springs damaged	REPAIR as necessary. REPAIR as necessary.
Direct Clutch Assembly
Seals, piston damaged	REPAIR as necessary.
Friction elements damaged or worn	REPAIR as necessary. REPAIR as necessary.
Return springs damaged	REPAIR as necessary. REPAIR as necessary.
Intermediate Clutch Assembly
Seals, piston damaged	REPAIR as necessary.
Filtered orifice damaged, missing, not seating, off location	INSPECT for mislocation, poor seating, damage. INSTALL a new center support if damaged.
Friction elements damaged or worn	REPAIR as necessary.
Return springs damaged	REPAIR as necessary. REPAIR as necessary.
Snap ring for One-Way Clutch (OWC) and/or return spring not seated or damaged	REPAIR as necessary. REPAIR as necessary.
Torque Converter	REMOVE the transmission. INSPECT for damage. REFER to TORQUE CONVERTER CONTAMINATION INSPECTION in this service information. If the torque converter fails to pass the criteria for replacement or is damaged, INSTALL a new or remanufactured torque converter.
Internal failure