Fluid Pressure Test Hole Plugs - Torque Converter Housing

Fig 1: Fluid Pressure Test Hole Plugs - Torque Converter Housing
Courtesy of GENERAL MOTORS CORP.
1. 2nd Clutch
2. 5th Clutch and Reverse Clutch
3. Line Pressure
4. 3rd Clutch

Fig 2: Line Pressure Test & Fluid Pressure Test Hole Plugs

Courtesy of GENERAL MOTORS CORP.

Line Pressure Test

1. Remove the fluid pressure test hole plug (1).
2. Connect the J 45542  and the SA9127E  . See Special Tools .
3. Start the engine and operate at 2,000 RPM in the PARK or NEUTRAL position.
IMPORTANT: If the transmission is not in the PARK or NEUTRAL position the gage may have a higher pressure reading.
4. Measure the line pressure reading and compare the measurement to the following specifications:

   Specifications: 

   • Standard: 900-960 kPa (130-140 psi)
   • Service Limit: 850 kPa (120 psi)

5. If the pressure reading is below the service limit, inspect for the following conditions:
   • Low fluid level
   • Restriction in the automatic transmission filter
   • Faulty torque converter check valve
   • Automatic transmission fluid pump worn or damaged
   • Torque converter faulty
   • Regulator valve body for the following conditions:
     • weak spring
     • stuck valves
     • leaking O-ring seals

5th Clutch Pressure Test

1. Remove the fluid pressure test hole plug (2).
2. Connect the J 45542  and the SA9127E  . See Special Tools .
3. Shift the transmission into Drive.
4. Using the scan tool, command the transmission to shift into 5th gear.
5. Increase the engine speed to 2,000 RPM.
6. Measure the 5th clutch pressure reading and compare to the following specifications:

   Specifications: 

   • Standard: 890-970 kPa (130-140 psi)
   • Service Limit: 840 kPa (120 psi)

7. If the pressure reading is below the service limit, refer to the table at the end of this procedure for a possible cause.

3rd Clutch Pressure Test

1. Remove the fluid pressure test hole plug (3).
2. Connect the J 45542  and the SA9127E  . See Special Tools .
3. Shift the transmission into Drive.
4. Using the scan tool, command the transmission to shift into 3rd gear.
5. Increase the engine speed to 2,000 RPM.
6. Measure the 3rd clutch pressure reading and compare to the following specifications:

   Specifications: 

   • Standard: 890-970 kPa (130-140 psi)
   • Service Limit: 840 kPa (120 psi)

7. If the pressure reading is below the service limit, refer to the table at the end of this procedure for a possible cause.

Reverse Clutch Pressure Test

1. Remove the fluid pressure test hole plug (2).
2. Connect the J 45542  and the SA9127E  . See Special Tools .
3. Shift the transmission into Reverse.
4. Increase the engine speed to 2,000 RPM.
5. Measure the 2nd clutch pressure reading and compare to the following specifications:

   Specifications: 

   • Standard: 890-970 kPa (130-140 psi)
   • Service Limit: 840 kPa (120 psi)

6. If the pressure reading is below the service limit, refer to the table at the end of this procedure for a possible cause.

Fig 3: 2nd Clutch Pressure Test & Fluid Pressure Test Hole Plugs

Courtesy of GENERAL MOTORS CORP.

2nd Clutch Pressure Test

1. Remove the fluid pressure test hole plug (1).
2. Connect the J 45542  and the SA9127E  . See Special Tools .
3. Shift the transmission into Drive.
4. Using the scan tool, command the transmission to shift into 2nd gear.
5. Increase the engine speed to 2,000 RPM.
6. Measure the 2nd clutch pressure reading and compare to the following specifications:

   Specifications: 

   • Standard: 890-970 kPa (130-140 psi)
   • Service Limit: 840 kPa (120 psi)

7. If the pressure reading is below the service limit, refer to the table at the end of this procedure for a possible cause.

4th Clutch Pressure Test

1. Remove the fluid pressure test hole plug (2).
2. Connect the J 45542  and the SA9127E  . See Special Tools .
3. Shift the transmission into Drive.
4. Using the scan tool, command the transmission to shift into 4th gear.
5. Increase the engine speed to 2,000 RPM.
6. Measure the 4th clutch pressure reading and compare to the following specifications:

   Specifications: 

   • Standard: 890-970 kPa (130-140 psi)
   • Service Limit: 840 kPa (120 psi)

7. If the pressure reading is below the service limit, refer to the table at the end of this procedure for a possible cause.

Fig 4: 1st Clutch Pressure Test & Fluid Pressure Test Hole Plugs

Courtesy of GENERAL MOTORS CORP.

1st Clutch Pressure Test

1. Remove the fluid pressure test hole plug (2).
2. Connect the J 45542  and the SA9127E  . See Special Tools .
3. Shift the transmission into Drive.
4. Using the scan tool, command the transmission to shift into 1st gear.
5. Increase the engine speed to 2,000 RPM.
6. Measure the 1st clutch pressure reading and compare to the following specifications:

   Specifications: 

   • Standard: 890-970 kPa (130-140 psi)
   • Service Limit: 840 kPa (120 psi)

7. If the pressure reading is below the service limit, inspect for the following conditions:
   • Faulty 1st clutch piston check valve
   • 1st clutch piston O-ring seals worn or damaged
   • Scored or worn clutch hub piston bore
   • 1st or 2nd clutch shaft fluid passage O-ring seals worn or damaged

Coast Clutch Pressure Test

1. Remove the fluid pressure test hole plug (1).
2. Connect the J 45542  and the SA9127E  . See Special Tools .
3. Shift the transmission into Drive.
4. Using the scan tool, command the transmission to shift into 1st gear.
5. Increase the engine speed to 2,000 RPM.
6. Measure the coast clutch pressure reading and compare to the following specifications:

   Specifications: 

   • Standard: 760-830 kPa (110-120 psi)
   • Service Limit: 710 kPa (100 psi)

7. If the pressure reading is below the service limit, inspect for the following conditions:
   • Faulty coast clutch piston check valve
   • coast clutch piston O-ring seals faulty
   • Scored or worn clutch hub piston bore
   • 1st or clutch housing fluid passage O-ring seals faulty