"BEARING NOISE" FROM TRANSFER CASE AREA - 1999-2002 Nissan Frontier & 2000-2002 Xterra

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Classification:	Reference:	Date:
TF02-001	NTB02-019	February 19, 2002

1999-2002 FRONTIER & 2000-2002 XTERRA “BEARING NOISE” FROM TRANSFER CASE AREA

APPLIED VEHICLES:

1999-2002 Frontier (D22)
2000-2002 Xterra (WD22)

SERVICE INFORMATION

If an Applied Vehicle exhibits the following symptom:

“Bearing noise” (rumbling noise) coming from the bottom of the vehicle

The original transfer case companion flange dust cover may be amplifying the sound of the bearing.

A replacement companion flange designed to dampen the noise emitted from thebearing, should it occur, has been developed (see Figure 1).
Use the Service Procedure provided in this bulletin to verify and repair this incident, if itshould occur.

Figure 1

Put the vehicle up on a hoist and while in 4WD High use a “stethoscope” to verify that“bearing noise” is occurring.
1. If the noise is occurring in locations other than the transfer case assembly companion flange, this bulletin does not apply. Use the appropriate Frontier/Xterra Electronic Service Manual (ESM) to investigate other causes for the noise.
2. If noise is occurring from the transfer case assembly companion flange, proceed toStep 2, below.
Remove the original transfer case assembly companion flange. Reference the Electronic Service Manual (ESM), Section TF (Transfer)/ON-VEHICLE SERVICE/Replacing Oil Seal/FRONT CASE OIL SEAL.
Install the replacement companion flange and self-locking nut (see the PARTS INFORMATION section for more information) and re-assemble the parts removed in Step 2 in reverse order. Torque the self-locking nut to 226-324 N-m (23.0-33.0 kg-m, 166-239 ft-lbs.)
Test drive the vehicle to verify the noise is reduced.