Mack Granite (Gu), Mack Lr, Mack Pinnacle (Chu), Mack Pinnacle (Cxu), Mack Terrapro (Leu), Mack Terrapro (Mru), model years 2012 to 2016. Filed by Mack Trucks, Inc. and reported to NHTSA on 19 February 2016. 33,981 vehicles potentially affected.
What the notice says Mack Trucks, Inc. (Mack) is recalling certain model year 2012-2016 Granite (GU), Pinnacle (CHU, CXU), TerraPro (LEU, MRU), Titan (TD), and LR trucks manufactured from September 1, 2011, through September 8, 2015. The cap nut that retains the interaxle driveshaft yoke to the rear axle input shaft may loosen.
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.
The maker's own number for this recall: SC0399. That is the number on the owner letter and on the dealer paperwork. 16V099 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 16V099 cover?
- Mack Granite (Gu), Mack LR, Mack Pinnacle (Chu), Mack Pinnacle (Cxu), Mack Terrapro (Leu), Mack Terrapro (Mru), Mack Titan (TD), model years 2012-2016.
- What is wrong with them?
- Mack Trucks, Inc. (Mack) is recalling certain model year 2012-2016 Granite (GU), Pinnacle (CHU, CXU), TerraPro (LEU, MRU), Titan (TD), and LR trucks manufactured from September 1, 2011, through September 8, 2015.
- What can happen if it is not put right?
- If he cap nut loosens and falls off, the yoke can separate from the axle input shaft and allow the drive shaft to disconnect, increasing the risk of a crash.
- Is there a fix yet?
- Not yet, on the wording NHTSA publishes today. Mack will notify owners, and dealers will replace the cap nut. The input shaft threads will be inspected for damage. Any damaged input shaft will be replaced. These repairs will be performed free of charge. An interim notice was sent to owners on April 25, 2016. The recall began on June 7, 2016.
- What should I do now?
- Check your own vehicle by its VIN with NHTSA, which is the record to act on. The maker calls this recall SC0399, 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 he cap nut loosens and falls off, the yoke can separate from the axle input shaft and allow the drive shaft to disconnect, increasing the risk of a crash.”
affected
in the notice
caught
| Campaign | 16V099 |
|---|---|
| Filed by | Mack Trucks, Inc. |
| System at fault | Power Train:Driveline:Driveshaft |
| Reported to NHTSA | 19 February 2016 |
| Model years | 2012-2016 |
| Vehicles named | MACK GRANITE (GU), MACK LR, MACK PINNACLE (CHU), MACK PINNACLE (CXU), MACK TERRAPRO (LEU), MACK TERRAPRO (MRU), MACK TITAN (TD) |
What the notice says today
The consequence
If he cap nut loosens and falls off, the yoke can separate from the axle input shaft and allow the drive shaft to disconnect, increasing the risk of a crash.
The remedy
Mack will notify owners, and dealers will replace the cap nut. The input shaft threads will be inspected for damage. Any damaged input shaft will be replaced. These repairs will be performed free of charge. An interim notice was sent to owners on April 25, 2016. The recall began on June 7, 2016. Owners may contact Mack customer service at 1-610-709-2131. Mack's recall campaign number for this recall is SC0399.
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 same recall in other countries
This campaign carries a manufacturer code that also appears in another country’s register, which means the same defect was recalled there too.
- Canada: Transport Canada recall 2016079, recorded 18 February 2016 (within a week of the American filing)
Matched on SC0399, the manufacturer’s own number for this campaign, which is the only field the registers share. Exact match, nothing paired on brand and date. The two dates are adjacent instruments rather than the same one, so a difference of a day or two means nothing.
How often the two countries file on the same day · The European alerts
The models named here, across their whole recall history
- Mack Granite (Gu) recalls: 29 US campaigns
- Mack LR recalls: 15 US campaigns
- Mack Pinnacle (Chu) recalls: 20 US campaigns
- Mack Pinnacle (Cxu) recalls: 41 US campaigns
- Mack Terrapro (Mru) recalls: 3 US campaigns
- Mack Titan (TD) recalls: 3 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 16V099, wording as read on 16 September 2026. https://carsmultiverse.com/recall/16v099/
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.
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 16V099 on 23 August 2026, they were:
- Defect summary
d169c03f - Consequence
d6df4d65 - Remedy
3b8b3fa1
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 16V099 · how the whole register is watched
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Owners of these cars
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