GROUP
DRIVESHAFT &
AXLE
DATE
SEPTEMBER, 2020

NUMBER
20-DS-002HG
MODEL(S)
G80 (DH) AWD

Technical Service Bulletin
SUBJECT:

2017-2018MY G80 (DH) 3.8L AWD PROPELLER SHAFT
VIBRATION

Description: The bulletin describes the procedure to measure and set propeller shaft angles to
optimize driveline vibration performance on certain 2017-2018MY 3.8L AWD G80 (DH) vehicles.

NOTICE
For 2017-2018MY G80 3.8L AWD vehicles, perform the propeller shaft replacement first. If the
vibration persists after parts replacement, continue to the propeller shaft angle inspection service
procedure.

Applicable Vehicles: 17-18MY G80 (DH) 3.8L AWD vehicles.

Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

17-18MY G80 (DH) AWD PROPELLER SHAFT

SUBJECT:

Parts Information:
Part Name

Part Number

Image

Remarks

Washer

13510-10007B

Qty of required washers
depends on change of
angles required.

Propeller
Shaft 3.8L
AWD

49100-B1300

N/A

SST Information:
Part # / Description

Images

09958-3T100
Digital Inclinometer

NOTICE
Digital inclinometer is part of the BCW Unit
Correction Tool Set (09958-3T500).
The digital inclinometer (P/N 09958-3T100) is not
available as a separate tool.

If a replacement digital inclinometer/protractor is
needed, please order this model from an online
retailer:

https://www.digipas.com/product/precisionmeasurement/pocket-size-digital-level/dwl80e.php

Warranty Information:
Model

G80 (DH)
AWD

Op. Code

Operation

Op. Time Causal Part Nature Cause
Code Code

49100F07

Test Drive

0.3 M/H

49100F08

Test Drive, Replace Propeller Shaft,
Test Drive

1.8 M/H

Test Drive, Replace Propeller Shaft,
49100F09
Test Drive, Measure Angles and
Washer Installation, Final Test Drive.

2.9 M/H

49100B1300

Q55

ZZ1

NOTICE
Normal warranty applies.

TSB #: 20-DS-002HG

Page 2 of 12
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SUBJECT:

17-18MY G80 (DH) AWD PROPELLER SHAFT
Vehicle Arrives on Service Drive

Service Procedure: Flowchart

No vibration

Test drive
for vibration

Vibration confirmed

Vehicle produced from Sept.
12, 2018 to Feb. 19, 2020

Vehicle produced before
Sept. 12, 2018.

Check vehicle
production date
Replace Propeller Shaft

Check propeller
shaft angles.
Washers
required to
adjust to spec?

No

Investigate other
areas (tires)

No vibration

Test drive
for vibration
Vibration confirmed

Yes

Install washers per TSB
service procedures

No vibration

No

Check propeller
shaft angles.
Washers
required to
adjust to spec?

Test drive
for vibration
Yes

Vibration confirmed

Install washers per TSB
service procedures.

Replace propeller shaft

Test drive
for vibration

Vibration confirmed

Vibration confirmed

No vibration

Test drive
for vibration
No vibration

Service
Complete

Service Procedure: Propeller Shaft Replacement
Replace the propeller shaft per service manual procedures:
* Driveshaft and axle > Front Propeller Shaft Assembly > Propeller Shaft
Perform a test drive to confirm if vibration is resolved. If the vibration is not resolved, continue to the
propeller shaft angle inspection service procedures below.
TSB #: 20-DS-002HG

Page 3 of 12
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17-18MY G80 (DH) AWD PROPELLER SHAFT

SUBJECT:

Service Procedure: Propeller Shaft Angle Inspection

▶ PROTRACTOR (digital inclinometer)
USAGE

Bottom surface of protractor is magnetic.

To initialize angle measurements, set the
protractor against a reference surface.
When the reference position is set, press
the All Zero button to set to zero (0).

Arrows indicate positive or negative angles.

IMPORTANT
Orientation of the protractor affects the
measurement reading.

Always orient the protractor so
that the LCD display can be read
from the DRIVER’S SIDE of the
vehicle.
This will ensure that positive (+)
measurements (UP arrow) will be
consistent with the definitions in this TSB.

TSB #: 20-DS-002HG

Page 4 of 12
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SUBJECT:

17-18MY G80 (DH) AWD PROPELLER SHAFT

▶ PROPELLER SHAFT ANGLE DEFINITIONS

IMPORTANT
The propeller shaft angles Θ1 and Θ2 are defined as follows:
(Θ1): Angle Between Engine/Trans To Front Shaft Section
(Θ2): Angle Between Front and Rear Shaft Sections
(A): Protractor Angle Measurement Position
PLEASE NOTE Θ1 and Θ2 have different reference positions. This means the protractor
must be zeroed on the transmission for Θ1, and then re-zeroed on the front of the propeller
shaft for Θ2.
Angle Specifications (degrees) are shown below. If the measured angles are not within these
specifications, washers must be installed to adjust the angles to specifications, as described
in the service procedures below.
Propeller Shaft Angle Specifications:
Θ1: -0.6 to 0.4
Θ2: -0.3 to 0.7
*** The Θ1 angle directions are positive (+) when the front portion of the propeller shaft
slopes downwards (front to back) when compared to the transmission, and negative (-) when
the front portion of the propeller shaft slopes upwards.
*** The Θ2 angle directions are positive (+) when the rear portion of the propeller shaft slopes
downwards (front to back) when compared to the front portion of the propeller shaft, and
negative (-) when the rear portion propeller shaft slopes upwards.

*** Angle +/- Direction

Overview of driveline angles

+ Direction
Θ1

A

- Direction

Θ2

A

IMPORTANT
The propeller shaft angles Θ1 and Θ2 are defined as follows:
(Θ1): Angle Between Engine/Trans To Front Shaft Section
(Θ2): Angle Between Front and Rear Shaft Sections
(A): Protractor Angle Measurement Position

TSB #: 20-DS-002HG

Page 5 of 12
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SUBJECT:

17-18MY G80 (DH) AWD PROPELLER SHAFT

Θ1 detailed view
Transmission Slope

Θ1

A