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.
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HOMESERVICE MANUALSMERCURY2010MARINER HYBRID, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 574 (AUTOMATIC TRANSMISSION COOLING)DIAGNOSIS AND TESTINGTRANSAXLE COOLINGSYMPTOM TABLETRANSAXLE NORMAL OPERATING TEMPERATURE FLUID LEVEL CHECK (CVT)FLUID CONDITION CHECK (CVT)
2010 Mercury Mariner Hybrid, AWD
Fluid Condition Check (CVT)
2010 Mercury Mariner Hybrid, AWDSECTION Fluid Condition Check (CVT)
WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
CVT fluid is bluish green when it is new. The CVT fluid will darken from bluish green to darker green or brown as it ages. If there is an internal concern with a mechanical component, there will be metallic residue in the pan. With other transmission fluids, the odor is an indicator of heat damage or other concerns. With CVT fluid, the odor will not indicate heat damage or other concerns.
- Check the fluid level.
- Observe the color. The color under normal circumstances should be bluish green when new and will darken to dark green or brown as it ages, not black.
- Hold the fluid level indicator over a white facial tissue and allow the fluid to drip onto the facial tissue and examine the stain.
- If evidence of solid material is found, the transmission fluid pan should be removed for further inspection.
- If fluid contamination or transaxle failure is confirmed by the sediment in the bottom of the fluid pan, the transaxle must be disassembled and completely cleaned or installed new. This includes the cooler tubes.
- If the transaxle is to be overhauled or if installing a new transaxle, install a new transmission fluid cooler. For additional information, refer to TRANSMISSION FLUID COOLER .
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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.