I just looked at mine yesterday! It wasn't preventative unfortunately, I think I might be having an intermittent problem.
But now that you said it, I'm probably going to look again, closer this time.
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!