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Fig. 26: Connecting J 35944 To Oil Cooler 1. Disconnect both hoses (1 and 2) from the oil cooler pipes and connect them to the opposite oil cooler pipe. This will allow the oil cooler and pipes to be flushed in the normal flow 2. Repeat Step 6 and 7 of the Back Flush.
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 27: J 35944-A Water Supply Valve ON/OFF Positions 3. Release the trigger (1) of the J 35944-A and allow water only to rinse the oil cooler and pipes for 1 minute. See Special Tools. 4. Turn the J 35944-A water supply valve (3) to the OFF position and turn OFF the water supply at the faucet. See Special Tools. 5. Attach the shop air supply to the flushing system feed air valve (2) on the J 35944-A and blow out the water from the oil cooler and pipes. See Special Tools. Continue, until no
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
FLOW TEST Fig. 28: Clipping Discharge Hose To An Empty Oil Container 1. Disconnect the hose from the oil cooler pipe. Connect the oil cooler feed pipe, bottom connector, to the transmission for normal flow. 2. Clip the discharge hose (1) to an empty oil container. 3. Confirm the transmission is filled with automatic transmission fluid. Refer to Fluid Capacity Specifications for the correct automatic transmission fluid capacity. 4. Start the engine with the transmission in PARK range and run for 30 seconds after fluid begins to flow from the discharge hose (1). A minimum of 1.9 L (2 qt) must be discharged IMPORTANT: The Flow Test must be performed after the flush to ensure that all flushing solution and water is removed from the oil
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
during this 30 second run time. 5. If the fluid flow meets or exceeds 1.9 L (2 quarts) in 30 seconds, connect the oil cooler feed pipe to the bottom connector on the transmission. 6. If fluid flow is less than 1.9 L (2 qt) in 30 seconds, perform the following diagnosis: 1. Disconnect the J 35944-A discharge hose (1) from the oil cooler return pipe. See Special Tools. 2. Disconnect the oil cooler feed pipe at the radiator. 3. Connect the J 35944-A discharge hose (1) to the oil cooler feed pipe, radiator end. See Special Tools. 4. Clip the discharge hose (1) onto the oil drain container. 5. Start the engine with the transmission in PARK range and run for 30 seconds after fluid begins to flow from the discharge hose (1). A minimum of 1.9 L (2 qt) must be 7. If the amount of transmission fluid flow remains less than 1.9 L (2 qt) in 30 seconds, inspect the oil cooler feed pipe, bottom connector, for restrictions or damage. If no condition is CLEAN-UP 1. Disconnect the water supply hose from the J 35944-A and bleed any remaining air pressure from the flusher tank. See Special Tools. 2. Remove the fill cap from the J 35944-A and return any unused flushing solution to its container. See Special Tools. Rinse the J 35944-A with water. See Special Tools. Do not 3. After every third use, clean the J 35944-A as described in the instructions included with the tool. See Special Tools. 4. Dispose of any waste water/solution and transmission fluid in accordance with local regulations. BUSHING AND MATING SHAFT INSPECTION IMPORTANT: Proper bushing and corresponding mating shaft inspection should be performed before replacing the bushing, shaft, and in
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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