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Old 07-29-2010, 12:28   #1 (permalink)
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2006 highway howl

can anyone help me determine the cause of a 60MPH howl from the drivetrain????

this is only under constant throttle. as soon as the throttle is released, it goes away completely.

it sounds to me like a gear howl.

it is an 06 XLT 4WD V6, with 105,000 kms... (63,000 miles)
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Old 08-03-2010, 17:50   #2 (permalink)
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Re: 2006 highway howl

As it's 4wd, it could be an axle. When was the last 4x4 service done? If it was done ask to see the bill to see if the right fluid and amounts were used. If they weren't sealed up correctly one axle could leak fluid out around the pumpkin (gear housing) causing the whine you hear from lack of lubrication.
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Old 08-03-2010, 20:01   #3 (permalink)
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Re: 2006 highway howl

I think that the rearend is like the PTU, lifetime lube.

There is a TSB for '09s for a noise around that speed but for the I4 although some dealers have performed it on the V6 too which adds a counter balance weight to a transaxle support bolt. I had it but they found a cover for a rear sway bar link mislocated which took care of the problem
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Old 08-03-2010, 21:36   #4 (permalink)
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Re: 2006 highway howl

Here's something but for speeds 20-45mph. Could be same issue

Quote:
TSB 05-10-7

05/30/05

DRIVELINE WHINE 20-45 MPH (32-72 KM/H)
FORD:
2001-2006 Escape

MERCURY:
2005-2006 Mariner

ISSUE
Some 2001-2006 Escape and 2005-2006 Mariner vehicles equipped with a CD4E transaxle may exhibit a driveline whine at 20-45 MPH (32-72 Km/h) during light acceleration or deceleration. The sound may be more pronounced on vehicles equipped with steel wheels.

ACTION
If the whine noise occurs at the specified speed range 20-45 MPH (32-72 Km/h) during light acceleration or deceleration, install new dampened halfshaft assemblies. The revised halfshafts are designed to minimize the whine, however, a small amount of noise may be inherently characteristic. The dampened axle halfshafts will not correct driveline noises below or above 20-45 MPH (32-72 Km/h). Refer to Workshop Manual Section 307.
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