AWD - Driveline Vibration - Howl Noise At Highway Speeds In Cold Temperatures

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AWD – DRIVELINE VIBRATION – HOWL NOISE AT HIGHWAY SPEEDS IN COLD TEMPERATURES – BUILT ON OR BEFORE 8/13/2010

FORD:	2007-2011 Fusion
LINCOLN:	2007-2011 MKZ
MERCURY:	2007-2011 Milan

2007-2011 Fusion, Milan and MKZ vehicles equipped with all-wheel-drive (AWD) systems and built on or before 8/13/2010 may exhibit a driveline vibration or a howl noise at highway speeds in cold temperatures.

SERVICE PROCEDURE

Place the vehicle in neutral, position it on a hoist.
Index-mark both the driveshaft flanges at the power transfer unit (PTU) and rear differential unit (RDU).
Disconnect the rear driveshaft from the PTU and from the RDU assembly.
1. Leave the driveshaft attached to the vehicle.
Rotate the driveshaft by hand, and check for any roughness feel to both the front and rear driveshaft bearings.
1. If no roughness is felt from either bearing, do not continue with this article. Re-index the driveshaft.
2. If any roughness is felt from either bearing, replace the driveshaft assembly.

PART NUMBER	PART NAME
AE5Z-4R602-A	Rear Driveshaft Assembly
W520113-S440	Center Bearing Support Nut
W705443-S900	Exhaust Flex Pipe Flange Nut
W711960-S439	Rear Driveshaft-To-Pinion Flange Bolt

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Lucas 10122 75/140 Synthetic Gear Oil - 1 Gallon

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For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.

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Motorcraft SAE 75W-140 synthetic rear axle lubricant
Recommended for conventional and limited-slip differentials of passenger cars, light trucks, vans and buses that operated under mild to severe service conditions