Circuit/System Testing

1. Engine idling at the normal operating temperature.
2. Verify the transmission line pressures are within the specified range. Refer to Line Pressure Check , and Solenoid Valve Pressure .
   • If the pressures are not within range 

     Refer to Fluid Pressure High or Low .

   • If the pressures are within range 
3. Ignition OFF, remove the Q8 Control Solenoid Valve Assembly.
4. Verify the pressure changes for all solenoids when performing the solenoid test. Refer to Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .
   • If the pressure change does not occur 

     Replace the Q8 Control Solenoid Valve Assembly.

   • If the pressure changes 
5. Verify the conditions listed below do not exist. Repair or replace as necessary.

DTC P2723 Control Valve Upper Body Assembly 

Manual shift detent (w/shaft position switch) lever assembly not engaged with manual shaft.

DTC P2723 Control Valve Upper Body Assembly 

Clutch select valve 3 stuck OFF from debris, binding, damaged valve, or scored bore.

DTC P2723 or P2724 Lower Control Valve Body Assembly

• Actuator feed limit circuit supply fluid to solenoid restricted or not available from debris or sediment blockage.
• 1-2-3-4 clutch boost valve binding or scored bore which can also cause harsh shifts.
• 1-2-3-4 clutch regulator valve stuck/sticking from debris, binding, damaged valve, or scored bore.

DTC P2723 or P2724 Control Solenoid Valve Assembly

• Clutch pressure control solenoid 5 stuck ON or stuck OFF.
• Clutch pressure control solenoid 2 stuck OFF.
• Control solenoid filter plate assembly blocked, or damaged gasket seal.

DTC P2723 Channel Plate and Spacer Plate 

Channel plate and spacer plate oil channels or orifices blocked by debris.

DTC P2723 1-2-3-4 Clutch Assembly

• 1-2-3-4 clutch piston cracked/damaged/leaking.
• 1-2-3-4 clutch backing plate retaining ring not seated/oriented, causing clutch pack/piston over travel.

DTC P2723 Low and Reverse Clutch Assembly

• Low and reverse clutch assembly will not hold torque.
• Low and reverse clutch assembly friction plate support face cracked/damaged.

DTC P2723 Automatic Transmission Case 

Transmission case 1-2-3-4 clutch fluid passage seal damaged/leaking.

DTC P2723 Automatic Transmission Fluid Pump

• Fluid pump housing vanes/rotor/slide damaged/scored.
• Fluid pump outlet seal assembly damaged/leaking.

DTC P2723 Torque Converter Assembly 

Fluid pump or torque converter overstressed due to high temperatures.

DTC P2723 Automatic Transmission Fluid Filter Assembly 

Oil filter or filter seal loose or damaged.

DTC P2723 Reaction Sun Gear Assembly

• Reaction sun gear broke away from shell.
• Input sun gear missing or broken.