Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Flow Check
- Disconnect both hoses from the oil cooler pipes. Connect the oil cooler feed pipe, bottom connector, to the transmission. Connect the return pipe, top connector, to the discharge hose (5). This will require the use of J-44835-1 . Clip the discharge hose (5) onto an empty oil drain container.
- Confirm the transmission is filled with automatic transmission fluid.
- Start the engine with the transmission in PARK range and run for 5 seconds at 2,400 RPM. A minimum of 2.2 L (2.3 quarts) must be discharged during this 5 second run time.
- If fluid flow is greater than 2.2 L (2.3 quarts) in 5 seconds at 2,400 RPM, go to step 4.
- If fluid flow is less than 2.2 L (2.3 quarts) in 5 seconds at 2,400 RPM, perform the following diagnosis:
Disconnect the oil cooler feed line at the radiator. Connect the discharge hose (5) to the cooler feed line. Clip the discharge hose (5) to the empty oil drain container. Start the engine with the transmission in PARK range and run for 5 seconds at 2,400 RPM. A minimum of 2.2 L (2.3 quarts) must be discharged during this 5 second run time at 2,400 RPM. Do the following according to the flow rate:
- Insufficient feed flow: Inspect the transmission.
- Sufficient feed flow: Inspect the oil cooler return pipe, the oil cooler located in the radiator, and the auxiliary oil cooler.
- Remove the discharge hose (5), connect the cooler feed and return pipes to the transmission and fill the unit to the proper fluid level. Inspect the transmission oil cooler pipe connections at the radiator, the auxiliary cooler and the transmission for leaks.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.