S7666

Service Campaign S7666
November 2022
Transmission Bolt Replacement
Service Category Service
Section Function Group 431
Technician Skill Level A
Market North America
Applicability
VOLVO
Years
2020-2022
Models
VN
Introduction
Volvo has received reports of certain VN chassis, with Allison transmissions, containing possible
incorrect transmission mounting hardware. This hardware inconsistency could cause lack of force
needed to retain the transmission to the engine. This campaign will require removing the bell
housing flange screws one at a time and replacing the flange screws.
Production Change Information
This bulletin applies to vehicles built within the specified production changes below.
Brand
Engine
Emission Level
Starting Build Date
Ending Build Date
EM-USA17
24-September-2019
15-July-2022
Volvo
CU9
Warranty Information
This repair is covered by an authorized Service Program. Reimbursement is
obtained through the normal claim handling process.
Claim Type (used only when uploading from the Dealer Bus. Sys.)
B
Main Labor Code
Description
9000-06-09-01
Miscellaneous, Inspection
Causal Part
SCC Authorization
Code
Expiration Date
Hours
1.0
22936956
S7666
February 28, 2023
Service Campaign S7666
November 2022
Transmission Bolt Replacement
Parts Information
Part Numbers
Part Names
Quantity
984754
Flange Screw (M10X35)
12
Important Part Note
All parts are on mandatory return to TMAC. Tag all parts with the following. Include the VIN, milage,
hours, repair date, and the recorded breakaway torque of all 12 bellhousing flange screws.
Required Tools & Equipment
•
None
Calibration Information
•
None
Repair Procedure
1. Secure truck for service.
2. Properly support transmission during procedure.
3. Remove one bell housing flange screw and spacer making sure to record the breakaway
torque.
4. Inspect the flange screw for damage.
5. Inspect the flywheel housing threads for any damage.
6. If damage is found to the flywheel housing STOP THE REPAIR! and contact E-service.
7. Install a new flange screw part number 984754 without the spacer, torque to 51-61Nm
(38-45lbf-ft).
8. Continue above procedure (one at a time) on the remaining 11 bell housing flange
screws.
9. Once all bell housing flange screws have been replaced and torqued, the truck is ready
to be released for service.