Two common layouts
MotorTrend describes a fore-aft drag link (from the pitman arm back to the knuckle, as on older Dodge and Chevy trucks) and a crossover drag link that runs across the truck to the far knuckle. Some builds use high-steer arms on top of the knuckles to lift the linkage.
Angle and the track bar
On solid axles with a track bar, the drag link and track bar should stay close to parallel. If they don't, the axle moves and the steering follows: bump steer. EVO Manufacturing makes this point for Jeep JL and JT, and Thuren describes the same geometry on Ram trucks.
What to compare
- Bar or tube, outside diameter and wall (see materials).
- Tapered ends vs rod ends (see joints).
- Adjustability for centering the steering wheel, with jam nuts or clamps.
- Whether a dropped pitman arm is involved. MotorTrend notes a dropped arm puts more leverage on the steering box sector shaft.
Questions
What is bump steer?
The steering moving by itself as the suspension moves. It is common when the drag link and track bar are not close to parallel.
Where this comes from
- MotorTrend (4-Wheel & Off-Road): 4x4 truck steering system parts
- EVO Manufacturing: JL/JT front track bar steering correction
- Thuren Fabrication: 1994-2002 2500/3500, building your suspension
- Manufacturer drag link inspection and replacement criteria filed with NHTSA (PDF)
Last reviewed 2026-10-19. General information only: your vehicle and part maker's instructions come first.