Drivetrain - Humming Noises From The 4X4 Coupler
Group CHASSISNumber 09-SS-004
Date AUGUST, 2009
Model
SANTA FE, TUCSON
Subject
HUMMING NOISE FROM 4WD SYSTEM
DESCRIPTION:
Some 2005-2008 TUCSON (JM) and 2007-2008 SANTA FE (CM) vehicles equipped with 4WD systems may exhibit a humming noise originating from the 4WD coupling while driving between 10~40 MPH. To diagnose and repair this condition, first inspect the 4WD coupling assembly for noise and physical damage. If necessary, replace the 4WD coupling assembly. Without first inspecting the 4WD coupling assembly, do NOT replace the rear differential assembly. This bulletin provides the service procedure for replacing the 4WD coupling assembly.
VEHICLES AFFECTED:
Model: 2007-2008 SANTA FE (CM), 2005-2008 TUCSON (JM) with 4WD system
Applicable vehicle production date range: From Job#1 to Sept. 30, 2007
PARTS INFORMATION
SERVICE PROCEDURE:
NOTE:
The following procedure is illustrated using a CM Santa Fe. This procedure is also applicable to JM vehicles.
NOTE:
For further information, refer to the applicable shop manual.
INSPECTION PROCEDURE:
^ First, Identify that the source of the noise is the 4wd coupling assembly, before replacing.
^ Use Chassis Ears to identify the source of the noise.
^ If 4wd coupling assembly is the source, replace the assembly according to the procedure below.
^ If 4wd coupling assembly is not the source, investigate other causal parts.
^ If it is not clear whether or not the 4wd coupling assembly is the source, inspect for physical damage (dents, impact marks, etc.)
^ If physical damage is noted on the 4wd coupling assembly, replace it.
^ If no damage is noted, investigate other possible parts.
REPLACEMENT PROCEDURE