Ford did not disclose details of the engine used in the Bronco R. The only information that is known was that the engine was a twin-turbo EcoBoost engine. When it came to the four-wheel drive system, the vehicle experienced no issues with muddy sections of the course. While the drivers only had to use four-wheel drive with low gearing to get out of thick mud, the Bronco R stopped multiple times along the course to tug other competitors out of the mud, including a near 6,000 pound trophy truck. While the Bronco R's engine, transmission and four-wheel drive held up with no issues, many of the aftermarket suspension components did not fare the same. Around mile 495 of the 1000 mile journey, the passenger side spindle, lower-control arm and CV joint had been destroyed. The team was able to fix most issues and were able to continue the race until around mile 580, when the engine cooling fans began giving out (one fan had completely seized up, while the other was not working at max speed) causing the Bronco R to overheat and needing to be towed about eight miles to the next filling station. After about 30 minutes of working on the Bronco R to try to get it back on course, Ford pulled the vehicle out of the race due to severe mechanical issues.