Box vs rack
| Recirculating-ball box | Rack-and-pinion | |
|---|---|---|
| Typical front end | Solid axle, some IFS | IFS |
| Linkage | Pitman arm, drag link or centerlink, tie rods | Inner and outer tie rods |
| Key wear points | Box play, joints, idler (IFS) | Rack ends, boots, outer ends |
Joints
| Tie rod end | Rod end | |
|---|---|---|
| Mount | Taper | Straight bolt |
| Seal | Boot | Often none |
| Street | Normal | Check your state |
Materials
| Solid bar | DOM tube | |
|---|---|---|
| Same diameter | Stronger | Weaker |
| Weight | Heavier | Lighter |
| Dents | No concern | Watch wall thickness |
Part type
| OEM | Heavy duty | |
|---|---|---|
| Geometry | Factory | May be built for lifts |
| Best for | Stock | Lifted, big tires |
Where this comes from
- MotorTrend (4-Wheel & Off-Road): 4x4 truck steering system parts
- MotorTrend: How steering works
- MotorTrend: Steering you straight, Heim joints vs tie-rod ends
- SYZ Rod Ends: Are Heim joints street legal in the U.S.?
- MotorTrend (4-Wheel & Off-Road): Steel tubing, myth of the tube
- Forging Industry Association: How forgings compare to other processes
Last reviewed 2026-10-19. General information only: your vehicle and part maker's instructions come first.