| Clue | Source | Date |
|---|---|---|
| Car feature that offers better traction | USA Today | 24 Feb 2024 |
| Pickup truck option | Newsday | 12 Mar 2023 |
| Four to go | New York Times | 22 May 2019 |
| Four to go | ||
| Feature of some SUVs | Thomas Joseph | 21 Apr 2017 |
| *Traction aid for off-road vehicles | LA Times Daily | 02 Aug 2016 |
| *Traction aid for off-road vehicles | ||
| Auto traction improver |