Transmission Cooling System: Maintenance GMC Acadia I рестайлинг

Cooler Flow Check and Flushing Steps

1. Machine Set-up
2. Determine Minimum Flow Rate
3. Back Flush
4. Forward Flush
5. Flow Test
6. Code Recording Procedure
7. Clean-up

Special Tools

1. DT 45096 Transmission Oil Cooling System Flush and Flow Test Tool
2. DT 45096-50 Transmission Cooler Flush Adapter
3. Shop air supply with water/oil filters, regulator and pressure gauge - minimum 90 psi
4. Eye protection
5. Rubber gloves

For equivalent regional tools, refer to Special Tools .

Scheme 109

Scheme 110

Scheme 111

Scheme 112

1. Verify that the main power switch (1) is in the OFF position.
2. Place the main function switch (2) in the IDLE position.
3. Connect DT 45096 flush and flow test tool to the vehicle 12V DC power source by connecting the red battery clip to the positive, +, battery post on the vehicle and connect the negative lead to a known good chassis ground.
4. Turn the main power switch to the ON position.
5. Fill the supply tank with Dexron®VI through the fill port. CAUTION: Do not overfill the supply vessel. Damage to the unit may result. To verify the fluid level, view the LCD screen display while filling the unit, to ensure the fluid level does not exceed 30 L (32 qt).
6. Reinstall and tighten the fill cap.
7. Connect a shop air supply hose to the quick-disconnect on the rear panel marked SUPPLY AIR.

Scheme 113

Scheme 114

1. From the machine display, identify the temperature of the automatic transmission fluid that is stored in the supply vessel of DT 45096 flush and flow test tool.
2. Determine whether the transmission oil cooler is steel or aluminum by using a magnet (1) at the cooler flange (2) at the radiator.
3. Refer to the table below. Using the temperature from step 1, locate on either the Steel MINIMUM Flow Rate table or the Aluminum MINIMUM Flow Rate table the minimum flow rate in gallons per minutes (GPM). Record the minimum flow rate in GPMs and the supply fluid temperature for further reference. Example Fluid temperature: 75°F Cooler type: Steel The MINIMUM flow rate for this example would be 0.8 GPM.
4. Inspect transmission oil cooler lines for damage or kinks that could cause restricted oil flow. Repair as needed and refer to the appropriate GM service manual procedures.

Minimum Flow Rate in Gallons Per Minute (gpm)

Scheme 115

Scheme 116

Scheme 117

Scheme 118

1. Connect the DT 45096-50 cooler flush adapter (1) to the vehicle transmission oil cooler supply and return lines at the transmission.
2. Connect the black supply hose (1) to the return line, top connector of the transmission and the clear waste hose (2) to the feed line, bottom connector of the transmission, to the vehicle cooler lines. This is the reverse flow - backflush direction.
3. Turn the main function switch to the FLUSH position. Allow the machine to operate for 30 seconds.
4. Turn the main function switch to the IDLE position and allow the supply vessel pressure to dissipate.

Scheme 119

Scheme 120

1. Disconnect the supply and waste hoses from the vehicle cooler lines. Reverse the supply and waste hoses to provide a normal flow direction.
2. Turn the main function switch to the FLUSH position and allow machine to operate for 30 seconds.

Scheme 121

1. Turn the main function switch to the FLOW position and allow the oil to flow for 15 seconds. Observe and note the flow rate; this is the TESTED flow rate. NOTE: If the flow rate is less than 0.5 gpm, the LCD displays an error message. Refer to the Troubleshooting section of the operation manual.
2. Compare the TESTED flow rate to the MINIMUM flow rate information previously recorded. If the TESTED flow rate is equal to or greater than the MINIMUM flow rate recorded, the oil cooling system is functioning properly. Perform «Code Recording Procedure»(ref-610129-S06932288462014042100000) . If the TESTED flow rate is less than the MINIMUM flow rate previously recorded, repeat the back flush and forward flush procedures.
3. If the TESTED flow rate is less than the MINIMUM flow rate after the second test, perform «Code Recording Procedure»(ref-610129-S06932288462014042100000) . Replace the transmission oil cooler. Reconnect supply and waste hoses to the cooler lines in the normal flow direction. Perform Flow Test. Perform «Code Recording Procedure»(ref-610129-S06932288462014042100000) .

Scheme 122

1. Turn the main function switch to the CODE position.
2. Record TESTED flow rate, temperature, cycle and seven-character flow code information on repair order. NOTE: If power is interrupted prior to the recording of the seven-character code, the code will be lost and the flow rate test will need to be repeated. The flow test must run for a minimum of 8-10 seconds and be above 0.5 GPM for a code to be generated.

Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection

Special Tools

1. DT-28585 Universal Snap Ring Remover for the 5/8 inch Line
2. DT-41623-B 3/8 inch Line Quick Release Tool

Scheme 123

Scheme 124

Scheme 125

Scheme 126

Scheme 127

1. Remove the plastic cap from the quick connect fitting by pulling the cap back along the pipe.
2. Install the DT-41623-B 3/8 inch line quick release tool onto the transmission oil cooler (TOC) pipe or use the DT-28585 universal snap ring remover for the 5/8 inch line.
3. Slide the DT-41623-B 3/8 inch line quick release tool toward the TOC pipe fitting or use the DT-28585 universal snap ring remover for the 5/8 inch line.
4. Connect the DT-41623-B 3/8 inch line quick release tool onto the TOC pipe fitting. NOTE: Rotate the DT-41623-B 3/8 inch line quick release tool to engage the TOC pipe fitting's retainer slots. The DT-41623-B 3/8 inch line quick release tool should be nearly flush with the fitting.
5. Rotate the DT-41623-B 3/8 inch line quick release tool or use the DT-28585 universal snap ring remover for the 5/8 inch line until the retainer clip (1) rises above the fitting retainer seat.
6. Pull back on the TOC pipe to disengage the pipe from the TOC pipe fitting.
7. Remove the DT-41623-B 3/8 inch line quick release tool or the DT-28585 universal snap ring remover for the 5/8 inch line from the TOC pipe.

Scheme 128

1. Install the TOC pipe into the TOC pipe fitting. NOTE: Discard the TOC retaining clip and install a new retaining clip. A distinct snap should be heard or felt when assembling the TOC pipe to the fitting.
2. Install the plastic cap onto the quick connect fitting. The plastic cap should snap onto fitting and spin freely by hand.
3. To ensure the cooler line is properly installed, give the cooler pipe a gentle pull.

Scheme 129

Fluid Cooler Inlet Hose Replacement

Scheme 130

Fluid Cooler Outlet Hose Replacement