Shift Concerns: No 4-5 Shift (Automatic)

SHIFT CONCERNS: NO 4-5 SHIFT (AUTOMATIC) - DIAGNOSTIC ROUTINES

Possible Component	Reference/Action
223 - ELECTRICAL ROUTINE
Powertrain Control System
Electrical inputs/outputs, vehicle wiring harnesses, PCM, Shift Solenoid B (SSB) failed, Shift Solenoid A (SSA) stuck on, Transmission Range (TR) sensor	Run On-Board Diagnostic (OBD). Refer to INTRODUCTION - GASOLINE MODELS for diagnosis. Go To PINPOINT TEST A and Go To PINPOINT TEST D .
Transmission Control Switch (TCS)/Overdrive (O/D) Cancel Switch
Switch control circuit open/shorted, switch damaged	Refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS .
323 - HYDRAULIC/MECHANICAL ROUTINE
Main Control Valve Body
Bolts out of torque specification	Tighten bolts to specification.
Gaskets and separator plate - damaged, off location	Inspect for damage. Install new as required.
Direct regulator and boost valves, springs, clips - loose, stuck, missing, misassembled, clutch failed off	Inspect for damage. Repair or install new as required.
Forward regulator and boost valves, springs, clips - loose, stuck, missing, misassembled, clutch failed on	Inspect for damage. Repair or install new as required.
SSB not functioning correctly, SSA stuck on	Activate solenoid using scan tool. Refer to OUTPUT STATE CONTROL (OSC) MODE . Go To PINPOINT TEST A . Install a new solenoid body. Refer to SOLENOID BODY ASSEMBLY . Download a new solenoid body strategy into the PCM. Refer to SOLENOID BODY STRATEGY .
Direct Clutch Assembly - Failed Off
Seals - damaged	Inspect for damage. Install new as required.
Piston - damaged	Inspect for damage. Install new as required.
Friction - damaged, worn	Inspect for damage. Install new as required.
Cylinder hub - damaged	Inspect for damage. Install new as required.
Return spring assembly - damaged	Inspect for damage. Install new as required.
Forward Clutch Assembly - Failed On
Seals - damaged	Inspect for damage. Install new as required.
Piston - damaged	Inspect for damage. Install new as required.
Friction - damaged, worn	Inspect for damage. Install new as required.
Cylinder hub - damaged	Inspect for damage. Install new as required.
Return spring assembly - damaged	Inspect for damage. Install new as required.