Mack Chu, Mack Granite (Gu), Mack Leu, Mack Mru, Mack Pinnacle (Cxu), model years 2013 to 2014. Filed by Mack Trucks, Inc. and reported to NHTSA on 17 October 2013. 1,155 vehicles potentially affected.
What the notice says Mack Trucks is recalling certain model year 2013-2014 CHU, CXU, GU, LEU, and MRU vehicles manufactured with pro-torque axle spindle nuts from August 28, 2012, through August 16, 2013. The pro-torque nut may not have been installed correctly, which may result in a loosening of the nut.
Is your vehicle included? Check with your VIN at NHTSA, or ask a dealer. This page is an independent copy of the notice, kept so you can see what changed after it was published. It is not the authority, and the authority’s own text is the one to act on.
Mack's own number for this recall: SC0371. That is the number on the owner letter and on the dealer paperwork. 13V492 is the number NHTSA gave the same campaign, and the number this page is filed under. They are one recall, written two ways.
What owners ask about this recall
- Which vehicles does recall 13V492 cover?
- Mack Chu, Mack Granite (Gu), Mack Leu, Mack Mru, Mack Pinnacle (Cxu), model years 2013-2014.
- What is wrong with them?
- Mack Trucks is recalling certain model year 2013-2014 CHU, CXU, GU, LEU, and MRU vehicles manufactured with pro-torque axle spindle nuts from August 28, 2012, through August 16, 2013. The pro-torque nut may not have been installed correctly, which may result in a loosening of the nut.
- What can happen if it is not put right?
- If the nut comes loose, the hub assembly may separate from the vehicle, increasing the risk of a crash.
- Is there a fix yet?
- Yes, and it is free. Mack Trucks will notify owners, and dealers will inspect and repair the vehicles, as necessary, free of charge. The recall began on November 12, 2013. Mack's recall number is SC0371. Owners may contact Mack Trucks at 1-336-393-2000.
- What should I do now?
- Check your own vehicle by its VIN with NHTSA, which is the record to act on. Mack calls this recall SC0371, which is the number on the owner letter and the dealer paperwork.
Answered from the register this site holds. NHTSA is the record to act on.
What the authority says can happen if this is not fixed: “If the nut comes loose, the hub assembly may separate from the vehicle, increasing the risk of a crash.”
affected
in the notice
caught
| Campaign | 13V492 |
|---|---|
| Filed by | Mack Trucks, Inc. |
| System at fault | Power Train:Axle Hubs |
| Reported to NHTSA | 17 October 2013 |
| Model years | 2013-2014 |
| Vehicles named | MACK CHU, MACK GRANITE (GU), MACK LEU, MACK MRU, MACK PINNACLE (CXU) |
What the notice says today
The consequence
If the nut comes loose, the hub assembly may separate from the vehicle, increasing the risk of a crash.
The remedy
Mack Trucks will notify owners, and dealers will inspect and repair the vehicles, as necessary, free of charge. The recall began on November 12, 2013. Mack's recall number is SC0371. Owners may contact Mack Trucks at 1-336-393-2000.
What it said before
This campaign is in the register but not yet in the dated wording archive, so we cannot yet say whether its text has moved. It enters the archive on the next pass.
This is one of 816 notices in the record whose component field names power train. Across that group the median wait before owners were written to was 42 days.
Last checked . No change has been recorded in the wording.
The models named here, across their whole recall history
- Mack Chu recalls: 10 US campaigns
- Mack Granite (Gu) recalls: 29 US campaigns
- Mack Leu recalls: 13 US campaigns
- Mack Mru recalls: 15 US campaigns
- Mack Pinnacle (Cxu) recalls: 41 US campaigns
How to cite this record
Quoting the wording on this page means quoting a version, so the date belongs in the citation:
CarsMultiverse, recall 13V492, wording as read on 17 September 2026. https://carsmultiverse.com/recall/13v492/
The cross-border matches used on this site are deposited as a citable dataset: doi:10.5281/zenodo.22087136. The recall wording itself is published by the national authority named above and is theirs, not ours.
The recall record and its wording are published by the US National Highway Traffic Safety Administration and are US Government public domain. The dated archive, the comparison and any before-and-after above are CarsMultiverse. How fresh every engine behind this page is, is public on the status page. To check a specific vehicle, use NHTSA’s own VIN lookup.
Other Mack notices we hold
- 21V476: 2020-2021 Granite
- 13V493: model year 2014 CXU and GU model
- 13V195: model year 2013-2014 CHU, CXU, GU, MRU, and LEU trucks manufactured July 16, 2012, through march 18, 2013 and equipped with drum brakes
- 13V153: model year 2011-2013 CXU trucks manufactured November 23, 2010, through March 19, 2012
- 12V017: MODEL YEAR 2002-2005 MR AND LE HEAVY TRUCKS, MANUFACTURED FROM FEBRUARY 1, 2002, THROUGH DECEMBER 22, 2004
- 11V461: MODEL YEAR 2011-2012 CXU TRUCKS MANUFACTURED FROM MAY 1, 2010, THROUGH JANUARY 31, 2011
- 11V374: MODEL YEAR 2009-2012 MRU HEAVY TRUCKS MANUFACTURED FROM NOVEMBER 26, 2008, THROUGH APRIL 26, 2011
- 11V295: MODEL YEAR 2012, CHU, CXU, GU, MRU, LEU, AND TD TRUCKS EQUIPPED WITH A MERITOR DRIVELINE
All 14 Mack campaigns we hold · Every manufacturer in the record
The fingerprint of this notice
We take a SHA-256 of each of the three blocks of text the authority publishes and keep the first eight characters. As we last read campaign 13V492 on 23 August 2026, they were:
- Defect summary
98ad9649 - Consequence
f7ed9681 - Remedy
5fd8ffeb
We first read this notice on 21 August 2026. It has not moved since. If it ever does, these characters will not match, and the change will be dated here.
The wording we hold for 13V492 · how the whole register is watched
This notice names one vehicle among several registers that have written about it. Every notice this site holds for the Mack Pinnacle (Cxu), in all seven, is kept on that vehicle's own page, with the newest in each.
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Owners of these cars
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