Manufacturer specifications apply. This page explains concepts only. Torque values, clearances, preload, backlash ranges and procedures vary by axle model and must come from the vehicle or component manufacturer's service information. This directory does not publish repair specifications.
What this service covers
A solid (beam) axle houses the differential and both axle shafts in one rigid housing. It is simple and strong, which is why it is common on pickups, vans and commercial trucks.
Solid axle service covers the axle as a system: fluid, seals, bearings, shafts, the differential, the housing and how the axle is mounted to the suspension.
Common signs
- Leaks at the cover, pinion seal or axle ends
- Gear or bearing noise
- Uneven tire wear that may point to a bent housing or worn mounts
- Clunks from worn suspension bushings or U-bolts
What the work usually involves
- Fluid change with the lubricant type specified, including friction modifier for some limited-slip units
- Inspection of seals, vent, bearings, and the housing for straightness and cracks
- Inspection of spring or link mounts, U-bolts and bushings
- Repairs to the differential or shafts as found
Steps vary by vehicle and component design. Values and procedures come from the manufacturer's service information.
Vehicles this applies to
Pickups, vans, Jeeps and SUVs, and medium- and heavy-duty trucks.
Key terms
Limited-slip differential
A differential that resists a speed difference between the two wheels, using clutch packs, cones or special gearing, so more torque reaches the wheel with traction. Some clutch-type units require a specific fluid or friction-modifier additive; follow the manufacturer's fluid specification.
Full-floating axle
The wheel hub rides on its own bearings on a spindle that is part of the axle housing, so the housing carries the vehicle's weight and the axle shaft only transmits torque. Common on many 3/4-ton and 1-ton pickups and on commercial trucks.
Semi-floating axle
The axle shaft both transmits torque and supports the vehicle's weight at the wheel end through a bearing in the axle tube. Common on passenger vehicles and many half-ton pickups. How the shaft is retained (for example C-clip or bearing-retained) affects service procedures.
Axle housing
The structural center section and tubes that enclose the differential and axle shafts and provide mounting points for suspension and brakes. A bent or cracked housing can cause misalignment, abnormal tire and bearing wear, and leaks.
Choosing a shop
- Confirm the shop works on your vehicle class and, for trucks, your axle make.
- Ask what parts they install (new, remanufactured or rebuilt) and what warranty applies.
- Check the listing's verification status and date in this directory.