NTB24-007

Classification:
Reference:
RA23-003
Date:
NTB24-007
January 22, 2024
DIAGNOSING REAR FINAL DRIVE ASSEMBLY LEAKS
APPLIED VEHICLES:
2016-2024 Titan (A61)
2016-2024 Titan XD (A61)
SERVICE INFORMATION
If a Rear Final Drive Assembly (rear solid axle) is found to be leaking from one, or more, of
the locations listed below, the source(s) of the leak should first be identified and, if possible
repaired before the Rear Final Drive Assembly is considered for replacement.
A Rear Final Drive Assembly should not be replaced unless bearing, gear, or other
significant damage has occurred.
Possible points of fluid leaks:

Front Oil Seal (Pinion Seal)

Axle Tube Seal

ABS Rear Wheel Sensor

Rear Axle Wheel Bearing Seal

Gear Carrier Cover Gasket

Drain Plug
IMPORTANT: If a Rear Final Drive Assembly is found to have been replaced for a
repairable leak and no internal damage is present, the claim will be charged back.
Refer to pages 2-5 for additional information that illustrates and/or describes some, but not
all, possible points where fluid leaks can occur, as well as helpful service HINTs.

This bulletin is only intended as a diagnostic reference and does not direct or
imply repair.

Refer to the ESM for any applicable repair procedures, if needed.
Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are
properly trained individuals who have the equipment, tools, safety instruction, and know-how to do a job
properly and safely. NOTE: If you believe that a described condition may apply to a particular vehicle, DO
NOT assume that it does. See your Nissan dealer to determine if this applies to your vehicle.
1/5
Potential Fluid Leak Locations
Rear Axle Wheel
Bearing Seal;
Figure 3
Drain Plug
(located on rear cover)
Gear Carrier Cover
Gasket
Front Oil
Seal/Pinion Seal;
Figure 4
ABS Rear Wheel Sensor; Figure 2
Axle Tube Seal; Figure 2
Figure 1
2/5
NTB24-007
Axle Tube Seal Fluid Leak

A fluid leak can occur at the flange where the internal axle assembly mounts to the
axle tube. This is a single O-ring on the Titan, and an O-ring and Tube Seal on the
Titan XD.
HINT: Make sure to clean the groove and take care during installation to not
damage the seal(s).
ABS Rear Wheel Sensor Fluid Leak

If an ABS Rear Wheel Sensor body is cracked for any reason, or its O-ring
damaged, a leak can occur.
HINT: Replace the ABS Rear Wheel Sensor and clean the sealing surface well.
Axle Tube
Seal leak area
ABS Rear Wheel
Sensor leak area
Figure 2
3/5
NTB24-007
Rear Axle Wheel Bearing Seal Fluid Leak

If a Rear Axle Wheel Bearing’s seal is damaged for any reason, a fluid leak will
appear behind the brake rotor, at the outer surface of the wheel/bearing hub
assembly.
HINT: If this type of leak occurs, the Axle Shaft Assembly including the O-ring
and, if applicable, the tube seal must be replaced.
Rear Axle Wheel
Bearing Seal leak
Figure 3
4/5
NTB24-007
Front Oil Seal Fluid Leak (Pinion Seal)
Front Oil Seal (Pinion Seal) leak
Figure 4
Gear Carrier Cover Gasket Fluid Leak
HINT: The Titan Gear Carrier Cover uses a physical gasket, and does not use
silicone RTV.
AMENDMENT HISTORY
PUBLISHED DATE REFERENCE
January 22, 2024
NTB24-007
DESCRIPTION
Original bulletin published
5/5
NTB24-007