Harsh Forward & Harsh Reverse

WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC ROUTINE - HARSH FORWARD & HARSH REVERSE

Possible Component	Reference/Action
208 - ROUTINE
Powertrain Control System
NOTE: The battery being disconnected or a PCM reflash will cause firm engagements. PCM, external vehicle wiring harnesses, transmission internal harness, line pressure solenoid PC-A, torque converter clutch solenoid TCC, TSS/Intermediate shaft speed sensor, TFT and TR position sensors, IAT, ECT	Carry out on-board diagnostic tests. Refer to the appropriate INTRODUCTION article for diagnosis and testing of the PCM.
	If the battery has been disconnected or the PCM has been reflashed, carry out the engagement schedule update.
	Go To PINPOINT TEST A: CONTROL SOLENOIDS , Go To PINPOINT TEST B: TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR , Go To PINPOINT TEST C: TRANSMISSION RANGE (TR) POSITION SENSOR , Go To PINPOINT TEST D: TURBINE SHAFT SPEED (TSS), INTERMEDIATE SHAFT SPEED, AND OUTPUT SHAFT SPEED (OSS) SENSORS , and Go To PINPOINT TEST E: PC-A (LINE PRESSURE) SOLENOID .
	Repair as necessary. Clear DTCs, road test and rerun on-board diagnostic test.
Fluid
Incorrect level	Adjust to the correct level. Refer to PRELIMINARY INSPECTION .
Condition	Carry out Fluid Condition Check. Refer to PRELIMINARY INSPECTION .
External Shift Cable
Cable system damaged, misaligned	Inspect and repair as necessary.
Incorrect Pressures
High pressures	Check line pressure at line tap.
Carry out Line Pressure Test, refer to SPECIAL TESTING PROCEDURES . Follow pressure diagnosis and repair as required.
Solenoid Body Assembly
Bolts not tightened to specification	Tighten to specification.
Filter gasket damaged	Inspect for damage. If damaged, install a new filter gasket.
Contamination	Disassemble and clean.
PC-A, TCC solenoid(s) damaged, stuck or bore damaged. Manual valve damaged, stuck or bore damaged. Blowoff valve damaged.	If damaged or parts are missing, install a new solenoid body assembly. If misassembled, reassemble correctly.
Fluid Pump Assembly
Bolts not tightened to specification	Tighten to specification.
Gasket damaged	Inspect for damage. If damaged, install a new gasket.
Porosity, cross leaks, cup plug missing, plugged hole	Inspect for damage. If damaged, repair as necessary.
Pump gears and/or gear pocket damaged	Inspect for damage. Install a new pump.
Control valves, springs, or seals damaged, stuck or not assembled correctly, blowoff valve damaged.	Inspect for damage. Install a new seal or pump assembly.
Low/Reverse Clutch Assembly
Seals, piston damaged	Inspect for damage. Repair as necessary.
Filtered orifice damaged, missing, not seating, off location	Inspect for mislocation, poor seating, damage. Install a new case.
Friction elements damaged or worn	Inspect for damage. Repair as necessary.
Return springs damaged	Inspect for damage. Repair as necessary.
Snap ring for OWC and/or return spring not seated or damaged	Inspect for damage. Repair as necessary.