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Harsh Forward & Harsh Reverse

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 FORWARD & HARSH REVERSE

Possible Component Reference/Action
208 - ROUTINE 
Powertrain Control System 
  • CARRY OUT On-Board Diagnostic (OBD) tests. REFER to the INTRODUCTION article for diagnosis and testing of the PCM, IAT  and ECT  . If the battery has been disconnected or the PCM has been reprogrammed, CARRY OUT the engagement schedule update. For diagnosing TCC  solenoid, GO to PINPOINT TEST A . For diagnosing TFT  sensor, GO to PINPOINT TEST B . For diagnosing TR  sensor, GO to PINPOINT TEST C . For diagnosing TSS  /intermediate shaft speed sensor, GO to PINPOINT TEST D . For diagnosing PCA  , GO to PINPOINT TEST E . REPAIR as necessary. CLEAR the DTCs, ROAD TEST the vehicle and RERUN the OBD  test.
NOTE: If the battery was disconnected or a PCM reprogramming performed, causes firm engagements.
PCM, external vehicle wiring harnesses, transmission internal harness, Pressure Control Solenoid A (PCA), Torque Converter Clutch (TCC) solenoid, Turbine Shaft Speed (TSS)/intermediate shaft speed sensor, Transmission Fluid Temperature (TFT) sensor and Transmission Range (TR) sensor, Intake Air Temperature (IAT) sensor, Engine Coolant Temperature (ECT) sensor, Power Take-Off (PTO)
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
Selector Lever Cable 
  • Cable system damaged, misaligned
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, correctly reassemble.
  • PCA  , TCC  solenoid(s) damaged, stuck or bore damaged. Manual valve damaged, stuck or bore damaged. Blowoff valve damaged
Fluid Pump Assembly 
  • Bolts not tightened to specification
  • TIGHTEN to specification.
  • Gasket damaged
  • INSTALL a new gasket.
  • Porosity, cross leaks, cup plug missing, plugged hole
  • REPAIR as necessary.
  • Pump gears and/or gear pocket damaged
  • INSTALL a new pump.
  • INSTALL a new seal or pump assembly.
  • Control valves, springs or seals damaged, stuck or not assembled correctly, blowoff valve damaged
Low/Reverse Clutch Assembly 
  • Seals, piston damaged
  • REPAIR as necessary.
  • Filtered orifice damaged, missing, not seating, off location
  • INSTALL a new case.
  • 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
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