Engagement Concern: Harsh Reverse - 203/303

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

ENGAGEMENT CONCERN: HARSH REVERSE - 203/303

Possible Component	Reference/Action
203 - ELECTRICAL ROUTINE
Powertrain Control System
Electrical inputs/outputs, vehicle wiring harnesses, internal transmission wiring harness, PCM, TP, VSS, RPM, SSA (off), electronic pressure control (EPC) solenoid	Run on-board diagnostic. REFER to the INTRODUCTION - CNG, FLEX-FUEL & GASOLINE for diagnosis. Carry out pinpoint tests using the diagnostic tool. Repair as required. Clear DTCs, road test and rerun Self-Test.
303 - HYDRAULIC/MECHANICAL ROUTINE
Incorrect Pressures
Incorrect band/clutch application pressure, high line pressure	Check line pressure at tap. Carry out line pressure and stall speed tests. See the LINE PRESSURE CHART for specification. If pressures are high, check the following component: main control.
Main Control Assembly
Screw out of torque specification	Tighten to specification.
Gasket damaged, off location	Inspect and install a new gasket.
Separator plate damaged	Inspect for damage. Repair as required.
EPC, SSA solenoid stuck, damaged, O-ring damaged or out bore	Inspect for damage. Carry out pinpoint test. Repair as required.
Reverse modulator valve (205), pressure boost valve/main regulator valve (208), check ball B, spring, damaged, missing, misassembled, stuck bore damaged	Inspect for damage. If damaged, install a new main control. If parts are missing, install new parts or main control. If misassembled, reassemble correctly. Do not stone, file or sand valves. This will remove the anodized finish and may result in further main control or transmission damage.
Wrong component used in rebuild	Verify that correct components were used.
Direct Clutch Assembly
Clutch assembly burnt, worn, check ball leaking in clutch piston, piston seal rings damaged, friction or steel plates damaged	Carry out air pressure test. Inspect for damage. Repair as required.
Reverse Band
Burnt, damaged	Inspect for damage. Repair as required.
Servo piston, seals, gasket or cover damaged	Inspect and install new piston, seals or gasket as required.
Reverse Drum
One way clutch damaged	Inspect for damage. Repair as required.
Bearing damaged	Inspect for damage. Repair as required.
Drum damaged	Inspect for damage. Repair as required.