K 2500 Suburban 4WD V8-5.7L VIN R (1999)
Transmission Cooler: Service and Repair
Automatic Transmission - 4L60-E
Transmission Oil Cooler Replacement
Removal Procedure
1. Disconnect the oil cooler line from the oil cooler.
2. Remove the four bolts securing the auxiliary oil cooler brackets to the radiator support.
3. Remove the four bolts and the nuts securing the auxiliary oil cooler to the two brackets.
Installation Procedure
Notice: Refer to Fastener Notice in Service Precautions.
1. Install the four bolts and the nuts securing the auxiliary oil cooler to the two brackets.
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Tighten the bolts to 6 Nm (53 inch lbs.).
2. Install the four bolts securing the oil cooler brackets to the radiator support.
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Tighten the bolts to 10 Nm (89 inch lbs.).
3. Connect the oil cooler line to the oil cooler.
Automatic Transmission Oil Cooler Flushing
Preparation
1. After the repaired or replacement transmission is installed in the vehicles, do not reconnect the oiler cooler lines.
2. Remove the fill cap on the J 35944 and fill the can with 0.6 L (20-21 oz.) of flushing solution. Do not overfill.
3. Install the fill cap on the J 35944 and pressurize the flusher can, using a shop air supply regulated at 550 - 700 kPa (80 - 100 psi).
4. Connect the J 35944 discharge hose to the oil cooler return line.
5. Clip the discharge hose onto the oil drain container.
6. Attach the J 35944 to the undercarriage of the vehicle with the hook provided and connect the hose from the J 35944 to the other (feed) oil cooler
line.
7. With the water valve on the J 35944 in the OFF position, connect the water hose from the water supply to the J 35944.
