NHTSA ID Number: 11030591
Manufacturer Communication Number: TSB M-432-002A 032026
TSB/Document Date: 2026-04-02
Summary
TSB - Cable, Gear Selector, Replacement
IMPACT 4.11.30
3/18/2026
Printed by:Colton Kidd
Service
Chassis ID
Path
4323/Technical service bulletins//Cable, Gear Selector, Replacement
Model
MD6
Identity
194316405
Publish date
3/12/2026
ID/Operation
M-432-002A
Copyright to this documentation belongs to the Volvo
Group. No reproduction, copying, change, amendment or other similar disposal is entitled without prior written consent by
the Volvo Group
The information contained herein is current at the time of its original distribution, but is subject to change. The reader is advised that printed copies are uncontrolled.
1/4
IMPACT 4.11.30
3/18/2026
Cable, Gear Selector, Replacement
M-432-002A
(February 2026)
Valid for
Mack MMD model vehicles equipped with 2500 series Allison transmissions.
Case description
Mack Trucks has identified that MMD model vehicles equipped with a 2500 series transmission may produce a
buzzing or chirping noise in the cab. This is due to the transmission shift cable transmitting vibrations from the
powertrain components. A new shift cable and mounting bracket have been developed to resolve the issue. Follow the
instructions below to install the updated parts.
Parts
Part Number
Description
Quantity
24841832
24819220
Shifter and Cable kit
Transmission Cable bracket
1
1
Repair Procedure
1. Secure the vehicle for service.
2. Follow Impact Operation 43027-2 Cable, Gear Selector, Replacement to remove the transmission shift cable and
gear selector.
3. Once the shift cable is removed, remove the screws from the transmission shift cable bracket.
Copyright to this documentation belongs to the Volvo Group. No reproduction, copying, change, amendment or other similar disposal is entitled without prior written consent by
4.
the Volvo Group
The information contained herein is current at the time of its original distribution, but is subject to change. The reader is advised that printed copies are uncontrolled.
2/4
IMPACT 4.11.30
3/18/2026
4. Remove the bracket.
5. Install the new shift cable bracket and assemble the new shift cable.
Tightening torque
Shift Cable Bracket, screws 24 ±4 Nm (18 ±3 lbf⋅ft)
6. Install the bottom jam nut first. Set the position to provide adequate barrel threads (at the end of the cable) for
adjustment.
Copyright to this documentation belongs to the Volvo Group. No reproduction, copying, change, amendment or other similar disposal is entitled without prior written consent by
the Volvo Group
The information contained herein is current at the time of its original distribution, but is subject to change. The reader is advised that printed copies are uncontrolled.
3/4
IMPACT 4.11.30
3/18/2026
7. Once set, tighten the top jam nut against the spacer.
8. Follow Impact Operation 43027-2 Cable, Gear Selector, Replacement to install the new gear selector and to
adjust the shift cable.
9. Release trucks.
Issued by
Technical Service
Copyright to this documentation belongs to the Volvo Group. No reproduction, copying, change, amendment or other similar disposal is entitled without prior written consent by
the Volvo Group
The information contained herein is current at the time of its original distribution, but is subject to change. The reader is advised that printed copies are uncontrolled.
4/4
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TSB/Document ID: TSB M-432-002A 032026
Replacement Service Bulletin Number:
MFR Communication Date: 2026-03-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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