NHTSA ID Number: 10100804
Manufacturer Communication Number: 16-NA-211
TSB/Document Date: 2017-05-25
Summary
THIS INFORMATIONAL BULLETIN INFORMS THE TECHNICIANS ON A CHANGE MADE TO THE INTERLOCK COMPONETS OF THE SHIFTING SYSTEM TO INCREASE THE ROBUSTNESS OF GEAR LOCKOUT WHEN NOT ENGAGED.
File in Section:
Service Bulletin
-
Bulletin No.:
16-NA-211
Date:
July, 2016
INFORMATION
Subject:
Information on 1st vs. 2nd Design Non-Interchangeable Shift System Parts
Brand:
Model:
ATS
Model Year:
VIN:
from
to
2013
2016
Involved Region or Country
from
Engine:
to
Equipped with
Manual
Transmission
(RPO M3L)
North America and N.A. Export Regions
Interim Model Year Design Change – M3L Interlock
Shift System
A change was made to the interlock components of the
shifting system to increase the robustness of gear
lockout when not engaged. The changes in 1st design
and 2nd design components are NOT
INTERCHANGEABLE.
It is possible that the same model year vehicle may
have either the first or second design transmission.
Based on the transmission design level, specific
parts catalog and service information needs to be
referenced when repairing a unit. Use the chart
below to identify the transmission design level.
RPO
Transmission Assembly
Number
Design
Level
Applicable
Service
Information
Applicable Part
Catalog
2013-2016 ATS
M3L
24270967
24270968
24273613
24273612
24275015
24275014
24275050
24275051
24273611
27273614
24261584
24261585
1st
Model year
2013-2015
Model year
2013-2015
2013-2016 ATS
M3L
All assembly numbers not
mentioned above
2nd
Model year 2016
Model year 2016
Model
Copyright 2016 General Motors
LLC. All Rights Reserved.
Page 2
July, 2016
Bulletin No.: 16-NA-211
How to Identify Transmissions:
4539947
4539679
There is a barcode label on the top of the transmission.
There is also a secondary ID tag on the side of the
transmission held by a bolt.
If the ID tag on the transmission is not visible, the
transmission design level can be identified by the
identification of the following components:
1. Modified shift shaft geometry on all shift shafts
including addition of holes through the 1st/2nd shift
shaft assembly and 3rd/4th lever selector
assembly.
2. Modified main case geometry and grooves for
interlock pins.
3. Unique parts of the interlock concept.
4. Modified geometry of the 5th/6th gate.
5. Modified geometry to the Gear Select Lever.
1. The geometry of the 1st/2nd shift shaft assembly
(1) and the 3rd/4th lever selector assembly (2)
were modified by adding through holes which
house new interlock pins. In addition to this every
shift shaft had its geometry modified by changing
grooves and chamfers which makes them
non-interchangeable between 1st (3) and 2nd (4)
design. For service please reference the correct
information and parts catalog by identifying these
parts or using the provided chart.
Bulletin No.: 16-NA-211
July, 2016
Page 3
4547664
2. The rear divider wall of the main case has grooves
(1) added which will hold interlock pins. For service
please reference the correct information and parts
catalog by identifying these parts or using the
provided chart.
4547726
4540828
3. The shifting system has an interlock bracket (1st
design) (1) and an interlock plate (2nd design) (2)
which are bolted to the main case. Identification of
these parts help determine transmission design
level. For service please reference the correct
information and parts catalog by identifying these
parts or using the provided chart.
4. The geometry of the 5th/6th gate was modified in
the area shown. A flat was created and the
thickness was reduced by approximately 3.0 mm
(1). For service please reference the correct
information and parts catalog by identifying these
parts or using the provided chart.
Page 4
July, 2016
Bulletin No.: 16-NA-211
4547782
5. The gear select lever has the machined area of the
cam reduced (1) as shown. For service please
reference the correct information and parts catalog
by identifying these parts or using the provided
chart.
Version
2
Modified
June 30, 2016 – Revising to include transmission assembly part numbers 24261584 and
24261585.
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.
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TSB/Document ID: 16-NA-211
Replacement Service Bulletin Number:
MFR Communication Date: 2016-07-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN:MANUAL TRANSMISSION
MFR Component System:
MFR Component Subsystem:
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