PSC MOTORSPORTS | BIG BORE XD® Steering Gear Conversion | 2003-2006 Jeep TJ / LJ | SG400R
PSC MOTORSPORTS | BIG BORE XD® Steering Gear Conversion | 2003-2006 Jeep TJ / LJ | SG400RPART#: PART#: PSC-SG400R
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PSC MOTORSPORTS | BIG BORE XD® Steering Gear Conversion | 2003-2006 Jeep TJ / LJ | SG400R
Description
The factory Mercedes ZF box on ’03–’06 TJ/LJ Wranglers? Weak. Small piston, thin case, and a bad habit of giving up when you add bigger tires or a locker. The BIG BORE XD Conversion Gear fixes all that with a Saginaw-style box, a bigger piston for more torque, and ports for Cylinder Assist when you’re ready to step up.
This isn’t a quick swap—it’s a proper conversion. You’ll need the right hoses, maybe a little steering shaft work, and in some cases a 1" body lift for clearance. But once it’s in, you’ll have a steering gear that can handle real trail abuse without crying uncle.
Required: Hose kit (HK2000)
Application Requirements
2003–2006 Jeep Wrangler TJ & LJ Replaces factory Mercedes ZF steering gear Requires PSC hose kit and possible steering shaft modification
Available Configurations
| Manufacturer Part Number | Configuration | Instructions |
|---|---|---|
| SG400R | BIG BORE XD® Steering Gear Conversion - Jeep TJ / LJ (2003-2006) | General PSC bleeding guide; consult product specifications |
Fitment Table
Vehicle Fitment
Vehicle browsing collections: TJ WRANGLER (1996-2006)
Collection year ranges are browsing groups. Use the exact year, engine, axle, body and configuration requirements below.
Application Requirements
2003–2006 Jeep Wrangler TJ & LJ Replaces factory Mercedes ZF steering gear Requires PSC hose kit and possible steering shaft modification
Available Configurations
| Manufacturer Part Number | Configuration | Instructions |
|---|---|---|
| SG400R | BIG BORE XD® Steering Gear Conversion - Jeep TJ / LJ (2003-2006) | General PSC bleeding guide; consult product specifications |
Warranty
PSC states that most products carry 12 months of coverage for manufacturing defects for the original purchaser. Eligibility and exclusions depend on the product and use. Racing, competition, off-road-only and non-street-legal products are excluded under PSC’s published terms. Installation-related damage and labour or incidental costs are not covered. Contact Niagara Jeeps & Trucks with proof of purchase before arranging a claim.
Shipping & Returns
Shipping & Refund Policy
Shipping:
We ship across Canada. Orders are processed within 1–2 business days. Delivery within Canada typically takes 3–10 business days depending on location and carrier. Tracking information will be provided once your order ships.
Refunds & Returns:
Returns are accepted within 30 days of delivery. Items must be unused and in original packaging. Please review our full return policy for more details.
Damaged or Incorrect Items:
If you receive a damaged or incorrect item, please contact us within 5 days of delivery. Call or text 416-624-1357 or email sales@Niagarajeeps.ca so we can resolve the issue quickly.