XL-7 2WD V6-3.6L (2007)
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Spark plugs
Inspect for improper gap, cracks, high resistance or a broken insulator.
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Ignition coil
Look for a white discoloration or bulls eye marks on the coil. This indicates arcing while the engine is misfiring.
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Fuel injector
There may be an intermittent internal electrical short.
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Engine mounts
Vibration from loose or weak mounts can be multiplied by TCC engagement.
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Axle joints
Check for proper installation, wear and/or damage.
Replace the torque converter if any of the following conditions exist:
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External leaks appear in the hub weld area.
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The converter hub is scored or damaged.
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The converter pilot is broken, damaged, or fits poorly into the crankshaft.
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You discover steel particles after flushing the cooler and the cooler lines.
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The pump is damaged, or you discover steel particles in the converter.
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The vehicle has TCC shudder and/or no TCC apply. Replace the torque converter only after all hydraulic and electrical diagnoses have been made.
The converter clutch material may be glazed.
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The converter has an imbalance which cannot be corrected.
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The ATF is contaminated with engine coolant.
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An internal failure occurs in the stator roller clutch.
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Overheating produced heavy debris from clutch material.
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You discover steel particles or clutch lining material in the fluid filter or on the magnet, when no internal parts in the unit are worn or damaged.
This condition indicates that lining material came from the converter.
Do not replace the torque converter if you discover any of the following symptoms:
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The fluid has an odor or the fluid is discolored, even though metal or clutch facing particles are not present.
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Transmission failure did not display evidence of damaged or worn internal parts, steel particles or clutch plate lining material in the unit and inside
the fluid filter.
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The vehicle has been exposed to high mileage only. An exception may exist where the lining of the torque converter clutch dampener plate has
seen excess wear by vehicles operated in heavy and/or constant traffic, such as taxi, delivery, or police use.
