How it works
MotorTrend explains the recirculating-ball box: a worm and ball nut turn a sector shaft, and the pitman arm on that shaft drives the linkage. Wear shows up as play at the steering wheel. A dropped pitman arm adds leverage on the sector shaft.
What to compare
- Exact fitment. Match the box to the vehicle and to the input and output splines. Don't guess; use the maker's lookup or your service info.
- New, remanufactured or rebuilt. Ask what was replaced and what the warranty covers (see OEM vs aftermarket).
- Hydraulics. TRW says the pump's flow and relief pressure must suit the gear. Don't pair a gear with a pump the maker doesn't list.
- Mounting. Install with the gear maker's instructions and torque. R.H. Sheppard's instructions show the order to follow.
Look at the frame too
The box bolts to the frame rail, and big tires add load there. MotorTrend shows frame cracking near the steering box mount. Inspect it before you fit a new box, and consider a brace.
Questions
Can I adjust out play in a steering box?
Some boxes have an adjustment, but the maker's procedure must be followed. Over-tightening can make the steering bind. First check that the play isn't in the joints or track bar.
Where this comes from
- MotorTrend (4-Wheel & Off-Road): 4x4 truck steering system parts
- TRW: Steering system maintenance guidelines (PDF)
- R.H. Sheppard: Removing and reinstalling a steering gear (PDF)
- MotorTrend (4-Wheel & Off-Road): Fixing a Chevy truck frame (steering box crack)
Last reviewed 2026-10-19. General information only: your vehicle and part maker's instructions come first.