TSB Document:

• Sorry, the NHTSA has not posted this TSB document yet.

You can still get the detailed info from Ford for this TSB. Call your local Ford dealer's service department & ask for a copy of TSB# 12590.

Affected Component: POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT

Summary

SOME 4X4 VEHICLES MAY EXHIBIT A MOAN NOISE FROM THE FRONT DIFFERENTIAL WHEN THE VEHICLE IS OPERATING IN 4X2 MODE AND GOES AWAY WHEN OPERATING IN 4X4 MODE. *TT

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