PIP5898

Bulletin No.: PIP5898
Published date: 01/30/2023
Preliminary Information
PIP5898 Rear Axle Leak
Product Investigation Review Required
Models
Brand:
Model:
Model Years:
VIN:
from
to
Engine:
Transmissions:
Cadillac
ATS
2013 - 2019
All
All
LTG, LCV, LFX, LGX
MYA, M5T, M5N
Cadillac
CTS
2014 - 2019
All
All
LTG, LCV, LFX, LGX
MYA, M5T, M5N
Involved Region or Country North America
Additional Options (RPO)
195 MM Axle
Condition
Some customers may comment that the rear differential carrier
assembly is leaking.
Cause
This condition may be caused by the side bearing retaining ring on
one or both sides blocking the rear axle shaft seal oil feed port. The
oil feed port being blocked causes the seal to not receive proper
lubrication and thus fail prematurely.
Correction:
After removing the faulty seal, the technician will inspect the position of the side bearing
retaining ring and reorientate the ring as necessary. The technician will also inspect the
shaft of the wheel drive shaft flange to ensure it does not also require replacement. Please
refer to the below for the proper inspection and service procedures.
NOTE: If the leak has been present long enough to damage the axle due to low lubrication
and caused bearing or gear set distress please make that determination prior to repairing a
leak on an axle that would require replacement anyway.
Service Procedure:
1) Remove rear axle shaft seal using existing procedure in SI - Rear Axle Shaft Seal
Replacement (195mm Axle)
2) Inspect the orientation of the side bearing retaining ring.
If the lube passage (1) is blocked by the snap ring as pictured below continue on to step 4. If
the opening in the snap ring (2) is properly lined up with the lube passage (1) proceed to
step 5.
3) Install a new axle shaft seal and remove the other seal and verify correct location. For
example if leak is from the left side and you remove the left side seal to replace the seal and
inspect orientation you also want to verify the right side to prevent a possible comeback.
4) If the snap rings are in the proper orientation replace the seals, inspect the flange sealing
surface, install new seals, fill to proper level and verify no further leaks. Only proceed to
next steps if EITHER snap ring is out of position.
5) If either side the snap ring is blocking the lube passage you will need to remove the
differential assembly to move the snap ring to the correct orientation. See Differential
Carrier Assembly Replacement
6) Since the seals are removed put the differential on the bench on its side so the snap ring
faces up. Using a pair of large snap ring pliers reposition the snap ring to unblock the oil
feed port. J-45126 was used and it was easier to compress the snap ring and tap it lightly to
loosen it in the grove, rotate the snap ring so that the opening in the snap ring (2) lines up
with the lube passage (1) to allow lube to get to the seal. make sure the snap ring is fully
seated in the groove once the proper orientation is achieved. Repeat for one or both sides as
needed.
7) Inspect the shaft of the wheel drive shaft flange for any damage caused by the seal.
8) Replace the wheel drive shaft flange as necessary.
Parts Information
Description
Part Number
Quantity
See EPC for parts based on year and application.
Warranty Information
For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the following
labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage
information.
Labor Operation
3087998
Description
Labor Time
Di erential Carrier Assembly Inspection and Rear Axle
3.5 HRS.
Shaft Seal Replacement
Labor Operation
Description
Labor Time
*This is a unique Labor Operation for Bulletin use only.
Version History
Version
Modi ed
1
01/27/2023 - Created on.
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