Outfit your semi to be Ready for the Road Ahead with strong and reliable bushings, with the Automann 3.5" Maintenance Kit. Thanks to its ability to update a vehicle's bushings, this replacement kit is able to help reduce the amount of mechanical friction between two components. Designed with a number of key parts such as trunnion nuts, trunnion seals, trunnion brash washers, and more. FleetPride is your First Click in Heavy Duty .