Recall 13V492 affects 1,155 2013-2014 Mack trucks for loose axle spindle nuts. Repair is free at any franchised Mack dealer.
Mack is recalling 1,155 2013-2014 Leu, Mru, Granite (Gu), Chu, and Pinnacle (Cxu) vehicles because a pro-torque axle spindle nut was installed incorrectly and can loosen. A loose nut can let the hub assembly separate from the vehicle, increasing crash risk; the dealer repair will be free once Mack makes it available.
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What's wrong?
The axle spindle nut on these 2013-2014 Mack Leu, Mru, Granite (Gu), Chu, and Pinnacle (Cxu) trucks holds the wheel hub and bearing assembly tight on the axle spindle. That hub is the mounting point for the wheel-end assembly, and the nut keeps the bearing clamped at the right setting while the axle carries load.
On affected trucks, the pro-torque axle spindle nut was not installed correctly. Because the nut was not seated or secured as intended, normal road load and wheel-end movement can let it loosen. Once the nut loosens, the hub and bearing assembly is no longer held with the intended clamping force, which leaves the wheel end out of its proper setup.
There is no warning sign before failure. An owner should not expect a specific light, sound, or handling change to appear first, so symptoms alone are not a reliable way to know whether the axle spindle nut is secure.
Who's affected?
Covers five Mack truck models across the 2013 and 2014 model years, all tied to the same drive axle component.
| 2014 Mack Leu | drive axle |
|---|---|
| 2014 Mack Mru | drive axle |
| 2013 Mack Mru | drive axle |
| 2014 Mack Granite (Gu) | drive axle |
| 2014 Mack Chu | drive axle |
| 2013 Mack Chu | drive axle |
| 2014 Mack Pinnacle (Cxu) | drive axle |
| 2013 Mack Granite (Gu) | drive axle |
| 2013 Mack Leu | drive axle |
| 2013 Mack Pinnacle (Cxu) | drive axle |
| Units affected | 1,155 |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
If the nut loosens, the hub assembly can separate from the vehicle, raising the risk of a crash. Keep trips limited until the vehicle is inspected, and schedule the recall repair with a Mack dealer. Repair will be free at any franchised Mack dealer once available.
What should I do?
- Check your VIN to confirm your 2013-2014 Mack Leu, Mru, Granite (Gu), Chu, or Pinnacle (Cxu) is included in this recall.
- Watch for Mack's owner notice dated November 12, 2013, and keep it with your service records.
- Contact a franchised Mack dealer and ask whether the free axle-hub inspection and pro-torque spindle-nut repair is open for your VIN.
- Reference recall number 13V492 and Mack recall SC0371 when you call.
- Avoid driving with wheel-end noise, vibration, or hub looseness; the axle hub can separate if the spindle nut loosens.
What happens at the repair
Mack's remedy calls for dealer inspection of the pro-torque axle spindle nuts on the affected trucks. If a nut was installed incorrectly or has loosened, a Mack technician repairs the vehicle at no charge. The filing says the recall began on November 12, 2013. The final dealer repair is free once available for your VIN, with parts and labor covered under the recall. Mack's recall number for this repair is SC0371.
Timeline
| October 17, 2013 | NHTSA published the recall |
|---|---|
| November 12, 2013 | Owner notification mailed |
Frequently asked questions
What is recall 13V492?
Recall 13V492 covers 1,155 2013-2014 Mack Leu, Mru, Granite (Gu), Chu, and Pinnacle (Cxu) trucks with pro-torque axle spindle nuts that were not installed correctly. A loose nut can let the hub assembly separate from the vehicle, increasing crash risk.
What should I do if my 2013-2014 Mack Leu, Mru, Granite (Gu), Chu, or Pinnacle (Cxu) is on this recall?
Check your VIN to confirm your specific truck is included in recall 13V492. If it is, contact a franchised Mack dealer to schedule the axle hub inspection and repair. Reference recall 13V492 or Mack recall number SC0371 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and Mack dealers will inspect and repair the affected axle hub parts as necessary free of charge.
What is the safety risk?
The safety risk is hub separation. If the pro-torque axle spindle nut loosens, the hub assembly can separate from the truck, increasing the risk of a crash. Confirm inclusion by VIN, then schedule the free dealer inspection and repair.
When did Mack begin this recall?
Mack began recall 13V492 on November 12, 2013. Owner notices and dealer instructions directed affected owners to arrange an inspection and repair through Mack dealers. The VIN decides whether a specific 2013-2014 Mack truck is included.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/13V492000 |
|---|---|
| Mack customer service | 1-336-393-2000 |
| NHTSA recall # | 13V492 |
| NHTSA recall # (full) | 13V492000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Recall Investigation Document (PDF) (PDF)
- Download Recall Document (PDF) (PDF)
- Download Recall Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Quarterly Report (PDF)
- Download Defect / Noncompliance Notice (PDF) (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on June 2, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →