Recall 15V746 covers 23 2014-2015 Spartan Metrostar and Defense Dept. Chassis Cab vehicles with loose axle hex nuts. Free repair at franchised Spartan dealers.
Spartan is recalling 23 2014-2015 Metrostar and Defense Dept. Chassis Cab vehicles because hex nuts on the drive-axle flange yoke were not tightened correctly. If the driveshaft disconnects from the drive axle, the vehicle can lose propulsion and crash risk rises; the Spartan dealer repair will be free once available.
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What's wrong?
The drive axle assembly on the 2014-2015 Spartan Metrostar and Defense Dept. Chassis Cab vehicles sends engine power through the driveline to the wheels. At the axle, a flange yoke is the metal coupling that holds the driveshaft connection in place, and hex nuts clamp that yoke tightly against its mounting surface.
On the recalled chassis cabs, those hex nuts were not tightened correctly on certain Marmon-Herrington drive axles. When the nuts are under-torqued, normal driveline load and vibration loosen the connection further. A loose flange yoke lets the driveline move in ways it was not designed to move, which stresses the axle connection and changes how the vehicle feels under power.
Drivers can notice driveline vibration while the vehicle is moving. A visual inspection can also show loose or missing nuts at the flange yoke, which is a warning sign that the axle connection needs recall repair.
Who's affected?
Covers both Metrostar and Defense Dept. Chassis Cab configurations for the 2014 and 2015 model years, with the drive axle listed for each.
| 2015 Spartan Metrostar | drive axle |
|---|---|
| 2014 Spartan Defense Dept. Chassis Cab | drive axle |
| 2014 Spartan Metrostar | drive axle |
| 2015 Spartan Defense Dept. Chassis Cab | drive axle |
| Units affected | 23 |
| Field incidents | NHTSA has logged no field incidents to date. |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
Loose driveshaft hex nuts can let the driveshaft disconnect from the drive axle. That can cut propulsion and increase crash risk, especially while moving in traffic. Driveline vibration or loose or missing nuts during inspection are warning signs. Repair will be free at any franchised Spartan dealer once available.
What should I do?
- Check your VIN to confirm your 2014-2015 Spartan Metrostar or Defense Dept. Chassis Cab is included in this recall.
- Contact a franchised Spartan dealer for current repair scheduling and ask for the free axle hex-nut inspection.
- Schedule the hex-nut tightening that secures the flange yoke and helps prevent the driveshaft from disconnecting from the drive axle.
- Bring the owner notice if you have it. If not, reference recall number 15V746 when you call.
- Avoid driving the vehicle if you feel loss of propulsion or driveline vibration before the inspection is complete.
What happens at the repair
At the dealer, a Spartan technician inspects the hex nuts on the flange yoke for the Marmon Herrington drive axle and tightens any loose nuts to the correct condition. The inspection and tightening are free under the recall once the repair is open for your VIN. Spartan lists a general reimbursement plan for this campaign. If you already paid out of pocket for this axle or flange yoke repair, bring your receipts and repair paperwork to the service desk so the claim can be reviewed under that plan.
| Reimbursement | Reimbursement available |
|---|
Timeline
| November 10, 2015 | NHTSA published the recall |
|---|---|
| November 20, 2015 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| November 20, 2015 | Interim owner notification (was planned for this date) |
| December 16, 2015 | Owner notification mailed |
Frequently asked questions
What is recall 15V746?
Recall 15V746 covers 23 2014-2015 Spartan Metrostar and Defense Dept. Chassis Cab vehicles with drive-axle flange-yoke hex nuts that were not tightened to specification. A Spartan dealer will inspect the hex nuts and tighten them as needed for free.
What should I do if my 2014-2015 Spartan Metrostar or Defense Dept. Chassis Cab is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 15V746. If it is, contact a Spartan dealer to schedule the drive-axle inspection. Reference recall number 15V746 when you call. The inspection and any needed tightening are free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair the defect at no cost, and Spartan dealers will inspect the drive-axle flange-yoke hex nuts and tighten them as needed free of charge.
What is the safety risk?
The safety risk is loss of propulsion while driving. In NHTSA campaign 15V746, loose flange-yoke hex nuts can let the driveshaft disconnect from the drive axle, which increases crash risk. The repair path is a free dealer inspection and tightening as needed.
When did Spartan start this recall repair?
Spartan began the recall repair on December 16, 2015. Owners of included vehicles can contact a Spartan dealer for the free drive-axle hex-nut inspection and tightening. Spartan customer service is listed at 1-800-543-4277, and Marmon Herrington customer service is listed at 1-517-543-6400.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/15V746000 |
|---|---|
| Spartan customer service | 1-517-543-6400 |
| NHTSA recall # | 15V746 |
| NHTSA recall # (full) | 15V746000 |
Source documents
-
Download Owner Notification Letter (PDF) - Download Recall Report (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 31, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →