Understanding truck and trailer axles.
Truck and trailer axles carry heavy loads through demanding conditions. Damage to a spindle, steering assembly or suspension component should be assessed carefully before any repair is considered.
This guide brings together information about axle and related component problems. Topics include trailer and drive axle spindles, king pins, brake spider plates, suspension components and trunnion assemblies.
When researching an axle problem, vehicle details and clear photos can help describe the symptoms. Visible damage can provide useful clues, but the condition of an axle assembly depends on the specific components involved.
Explore the repair guides