Reinforcing the steering box mount with a steel spacer and brace prevents frame cracks on 1984–2001 Jeep Cherokees, fixing slop and extending the unibody’s life.
The XJ’s thin unibody frame rail flexes under the factory steering box, especially after years of off-road use. A proper steering box upgrade – adding a steel spacer, brace, and a stronger box – eliminates dangerous looseness and keeps your Cherokee tracking straight. Before buying parts, you need to inspect the whole steering system and install the reinforcement before any heavy-duty linkage.
Why the XJ Steering Box Needs Reinforcement
The factory mounting bolts can loosen over time, and the unibody around the steering box is prone to cracking or tearing when you add larger tires or heavier steering loads. Without reinforcement, stronger steering linkage can make the flex worse.
What to Inspect Before the Upgrade
Check these areas first; fixing them often cures steering slop without a box swap:
- Track bar bushings and frame-side bracket – wear here causes wandering.
- Steering box mounting bolts – tighten to 65 ft-lbs (check for stripped threads).
- Frame around the steering box – look for cracks or elongated holes.
- Drag link and tie rod ends – loose joints need replacement.
If the box itself is worn, a direct replacement or a stronger unit is the next step. For a list of top-rated replacement steering boxes, see our tested roundup of the best XJ steering boxes.
Step-by-Step Steering Box Upgrade
Start by disconnecting the negative battery cable. Support the steering box from underneath, then remove the pitman arm nut and use a puller to separate the drag link. Unbolt the steering shaft coupling from the box, then disconnect the power steering lines (have a drain pan ready). Remove the three mounting bolts and lift the old box out.
Install the steel spacer (if your model year requires it) and the new or rebuilt box in reverse order. Reconnect the steering shaft, pitman arm, and drag link using the torque specs below. Refill with Chrysler PSF+4 or Dexron ATF, then bleed the system by turning the wheel lock-to-lock with the front wheels off the ground until the fluid is clear of air. Always get a front-end alignment afterwards – the toe will likely be out.
| Component | Torque |
|---|---|
| Steering box mounting bolts | 65 ft-lbs |
| Steering box brace fastener | 33 ft-lbs |
| Drag link to pitman arm nut | 60 ft-lbs |
| Drag link to knuckle nut | 35 ft-lbs |
| Drag link clamp bolts | 36 ft-lbs |
| Tie rod clamp bolts | 35 ft-lbs |
| Tie rod to knuckle / to drag link | 35 ft-lbs / 55 ft-lbs |
A common mistake is installing upgraded steering linkage without reinforcing the box mount first – this can crack the frame. Also, on 1996 and older XJs, the steering shaft must be attached before the box is mounted, so check your year’s procedure. After the first drive, recheck all fasteners and look for new frame cracks. More detailed procedures are covered in RoundForge’s XJ steering upgrade guide.
FAQs
Can I use a Durango steering box on my XJ?
Durango box swaps are discussed online, but they are not a direct XJ-specific replacement. The factory XJ box or a rebuilt unit with proper reinforcement is safer and simpler.
Do I need an alignment after a steering box upgrade?
Yes. Removing and reinstalling the steering box can change front toe. A professional alignment after any steering work prevents uneven tire wear and poor handling.
What power steering fluid does the XJ take?
References & Sources
- RoundForge. “Jeep XJ Steering Upgrades” Detailed guide on box reinforcement, spacer, and brace installation.