Circuit/System Testing

1. Engine idling at the normal operating temperature.
   NOTE: You must perform Circuit/System Verification  first.
2. Verify the transmission line pressures are within the specified range. Refer to Line Pressure Check  and Solenoid Valve Pressure (Gen 2) .
   • 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 does not change 

     Replace the Q8 Control Solenoid Valve Assembly.

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

P0796 or P0797 - Control Valve Body Assembly 

4-5-6 Regulator Valve stuck/sticking - debris, binding, damaged valve or scored bore.

P0796 - Transmission Cooling/Lubrication

• Restriction/leak in OAC, oil to air, cooler/radiator.
• Restricted/leaking/kinked/damaged transmission oil cooler lines.
• Restriction/leak in transmission fluid pump assembly.

P0796 - Automatic Transmission Fluid Filter Assembly 

Oil filter or filter seal loose or damaged.

P0796 - Input Shaft Support 

Input shaft tower seals damaged or leaking.

P0796 - 4-5-6 Clutch Housing Assembly 

4-5-6 Clutch Piston Assembly damaged/leaking.

P0796 - Torque Converter (w/Fluid Pump) Housing Assembly

• Fluid pump housing vanes/rotor/slide damaged/scored.
• Fluid pump or torque converter overstressed due to high temperature.

P0796 - 4-5-6 Reaction Carrier Hub Assembly 

4-5-6 Reaction Carrier Hub/Shaft - broken hub weld.

P0796 - 3-5-R and 4-5-6 Clutch Housing Assembly 

4-5-6 Clutch Backing Plate Retaining Ring not seated/oriented, causing clutch pack/piston overtravel.

P0796 Output Carrier Assembly 

Output carrier pinion pins too high or too low.

P0796 or P0797 - Q8 Control Solenoid Valve Assembly

• Clutch Pressure Control Solenoid 3 stuck ON/OFF.
• O-ring seals leaking.
• Valve body filter plate assembly cracked, blocked or damaged gasket seal.