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How to replace trailer leaf springs: when to replace, what to measure, the parts to renew (U-bolts, bushings, shackles, equalizers) and install steps.

Compare Timbren rubber helper springs and air bag kits for trucks that tow or haul in Canada: how each works, upkeep, and how to choose the right one.

How to tell if truck or SUV coil springs are worn or broken: sag, bottoming out, noises and uneven ride height, plus how to choose stock, HD or lift coils.

A U-bolt that is the wrong width or too short will not clamp the spring to the axle properly. Measure these four things before you order. 1. Diameter (thread size) Measure across the threaded rod: common sizes are 3/8", 7/16", 1/2", 9/16", 5/8", 3/4", 7/8" and 1". Note the thread pitch if you know it (for example 5/8"-18). 2. Bend shape Round bend fits round axle tubes. Square bend fits square axles, spring perches and many heavy truck applications. Semi-round is also available for some trucks. 3. Inside width Measure the inside distance between the two legs. For a round...

RVs and truck campers spend long periods loaded, then cover big distances over rough roads and mountain passes. That combination slowly takes the arch out of leaf springs. Sagging springs reduce ground clearance, upset handling and braking, and put extra stress on hangers, shackles and tires. Signs your springs are sagging The trailer or truck sits noticeably lower than it used to, or leans to one side. Tires rub the fender or wheel well over bumps. The suspension bottoms out on dips or driveways. On a truck carrying a camper, the headlights aim high and steering feels light. Uneven tire...