B1Ram 2500/3500Solid axle, track bar
B2Ford Super Duty4x4 mono-beam, 4x2 Twin I-Beam
B3GM HDIndependent front
B4JeepSolid axle Wrangler and Gladiator
B5Toyota and NissanCheck: rack or box
B6Medium dutyCommercial inspection rules
Last reviewed 2026-10-19. General information only: your vehicle and part maker's instructions come first.