22-NA-091

Service Bulletin
Bulletin No.:
22-NA-091
Date:
July, 2022
TECHNICAL
Subject:
Rear Axle Moan Type Noise During Left or Right Turns
Brand:
Model:
CT4
Cadillac
CT5
Model Year:
VIN:
from
to
from
to
2020
2022
—
—
Engine:
Transmission:
—
—
Involved Region or Country
North America, China, Japan, Cadillac Korea (South Korea), Middle East
Additional Options (RPOs)
AXLE POSI TRACTION-LIMITED SLIP (RPO G80)
Condition
Some customers may comment on a moan noise during left or right turns.
Cause
This condition may be caused by stick/slip effect of the posi-traction clutch plates in
the RDM.
Correction
Flush oil from RDM and refill it:
• If noise concern is present after refill, flush one more time.
• If noise concern is present after two refills, replace RDM.
Service Procedure
Warranty Information
Refer to Axle Lubricant Change and Differential Carrier
Assembly Replacement in SI.
For vehicles repaired under the Powertrain coverage,
use the following labor operation. Reference the
Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Parts Information
Causal
Part
Description
Part
Number
Qty
X
CARRIER, DIFF
84793108
1
N/A
FLUID, DIFF
Refer
to EPC
As Required
Labor
Operation
Description
Labor Time
3087338*
Drain & Refill Rear Axle
Fluid
0.6 hr
Add (Only If
Required)
Additional Drain & Refill
Rear Axle Fluid
0.4 hr
Add
Differential Carrier Assembly
Replacement (CT4)
3.6 hrs
Add
Differential Carrier Assembly
Replacement (CT5)
4.9 hrs
*This is a unique Labor Operation for bulletin use only.
Version
1
Modified
Released June 29, 2022
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
Copyright 2022 General Motors LLC. All Rights Reserved.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION