Real time Help - what size u-bolt for spring shackle? Update: One of the ubolts on my rear axle is sheared off on both ends. Local parts store had a 1/2" x 3" x 8" Ubolt - which is too short and also seems really tight on the axle. What's the correct length? Is 3 inch the correct width? Is a Grade 5 bolt ok? Stock axles with a 2.5 inch Belton springunder lift. Thanks in advance!