Engagement Concern: Harsh Reverse

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

ENGAGEMENT CONCERN - HARSH REVERSE

Possible Component	Reference/Action
203 - ELECTRICAL ROUTINE
Powertrain Control System
Electrical inputs/outputs, vehicle wiring harnesses, PCM, TFT sensor, EPC solenoid	Carry out self-test; REFER to the INTRODUCTION - GASOLINE article for diagnosis and testing of the Powertrain Control System. Carry out engagement test, EPC test and GO to PINPOINT TEST B or GO to PINPOINT TEST D . Check idle speed. Repair as required. Clear DTCs, road test and repeat self-test.
303 - HYDRAULIC/MECHANICAL ROUTINE
Fluid
Incorrect level	Adjust fluid to correct level.
Condition	Inspect condition of fluid.
Engine Driveline
Looseness in the driveshaft, U-joints or the engine mounts	Repair as required.
Shift Linkage
Damaged or incorrectly adjusted	Inspect and repair as required. Verify transmission shift cable adjustment; refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS . Adjust transmission shift cable as necessary. After repairing transmission shift cable, verify that the digital TR sensor is correctly adjusted. Adjust the digital TR sensor as necessary.
Incorrect Pressures
High line pressure, high EPC pressure	Check pressure at line and EPC pressure taps; refer to LINE PRESSURE CHART for specifications. If high, check the following components: main controls, oil filter and seal assembly.
Fluid Filter and Seal Assembly
Plugged or damaged Filter seal damaged	Install a new filter and seal assembly.
Main Controls
No. 6 shuttle ball, No. 5 check ball, manual valve, main regulator valve stuck, damaged or missing	Inspect for damage. Repair as required.
Bolts not tightened to specifications	Tighten bolts to specifications.
Gasket damaged	Inspect for damage and install a new gasket.
EPC solenoid stuck or damaged	Inspect for damage, contamination. Carry out EPC test in Routine No. 203. Repair as required.
Low Reverse Servo
Seals (piston and cover) damaged Servo cover retaining ring assembled incorrectly Anchor pins (case) damaged	Inspect for damage. Repair as required.
Pump Assembly
Bolts not tightened to specifications	Tighten bolts to specifications.
Porosity/cross leaks	Inspect pump assembly. Install new as required.
Gasket damaged	Inspect for damage and install a new gasket.
No. 1 and No. 2 seal rings damaged	Inspect for damage. Repair as required.
Reverse Clutch Assembly
Seals, piston damaged Check ball missing or damaged Friction elements damaged, worn Return spring piston damaged, worn	Inspect for damage. Repair as required.
Low Reverse Band
Band, servo, anchor pin damaged or worn	Inspect for damage. Repair as required.