Engagement Concern: No Forward in D5 or D4 Only

ENGAGEMENT CONCERN: NO FORWARD IN D5 OR D4 ONLY (201A)

Possible Component	Reference/Action
201A - ROUTINE
Powertrain Control System
PCM, vehicle wiring harnesses, Pressure Control Solenoid B	Carry out on-board diagnostic tests. Refer to the INTRODUCTION article in ENGINE PERFORMANCE. Go to PINPOINT TEST D: PRESSURE CONTROL (PC) SOLENOIDS (PCA, PCB, PCC) . Repair as required. Clear DTCs, road test and rerun on-board diagnostic test.
Main Control
Screw not tightened to specification	Tighten to specification.
Separator plate damaged	Inspect for damage. If damaged, install a new separator plate.
Contamination	Disassemble and clean.
Valves, springs damaged, misassembled, missing, stuck or bore damaged	If damaged or parts are missing, install a new main control assembly. 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.
Filter damaged, missing	Inspect for damage, repair as necessary.
Center Support
Screw not tightened to specification	Tighten to specification.
Seal rings or bearing damaged	Inspect for damage. Repair as necessary.
Outside diameter of case bore damage	Inspect for damage. Repair as necessary.
Support damaged or leaking	Inspect for damage. Repair as necessary.
Forward Clutch Assembly
Seals, piston damaged	Inspect for damage. Repair as necessary.
Check ball damaged, missing, not seating, off location	Inspect for mislocation, poor seating, damage. Install a new cylinder.
Friction elements damaged or worn	Inspect for damage. Repair as necessary.
Return springs damaged	Inspect for damage. Repair as necessary.
Bronze seal ring or bearing damaged	Inspect for damage. Repair as necessary.
Forward Planetary Assembly
Planetary damage	Inspect for damage. Repair as necessary.
Low One-Way Clutch
Worn, damaged or assembled incorrectly	Inspect for damage. Repair as necessary.