Name: Big Bore XD2 Cylinder Assist Steering Gearbox for 2007-18 Jeep JK PSC Performance Steering Components
Brand: PSC Steering Components
SKU: SG688R
Price: 1522.5 USD
Availability: InStock

// WHY THIS PART EARNS ITS SPOT

Equipped with PSC's Exclusive Ram Port Tower

-6AN Male Ports for connection to PSC Steering Assist Cylinder

85MM Piston for a 35 percent Increase in Torque Output to efficiently move large tire sizes greater than 37 Inches, locking front differentials, and larger aftermarket axles.

45MM Sector Shaft Diameter eliminates shear potential, one of the main failures of the OEM steering gearbox in severe conditions.

Mounting Pad areas re-engineered to improve structural rigidity and eliminates the need for bracing even on intermediate to severe duty use vehicles.

16:1 Turning Ratio delivers improved on-the-road driving manners and reduces oversteer.

PSC Exclusive Pitman Arm Included

// THE FULL RUNDOWN

PSC's Exclusive Big Bore XD2 Power Steering Gearbox is an essential, critical steering component for any Jeep JK with increased torque loads such as large tire sizes up to 37 Inches, locking front differentials, and larger aftermarket axles. Applications: Tech: The Big Bore XD2 Power Steering Gearboxes require a high flow rate, 1650 PSI Power Steering Pump for the best service life. High Mileage or Aftermarket Remanufactured OEM power steering pumps DO NOT meet the required flow rate specifications. Proposition 65 ⚠ WARNING: Cancer and Reproductive Harm https://www.P65Warnings.ca.gov

// WILL IT FIT? THE STRAIGHT ANSWER

Jeep - See Description

Manufacturer lists this part for the application above. Not 100% sure it fits your rig? Hit our Fitment Help page or ask our Jeep techs — we answer fast and we answer straight.

JAP FITMENT PROMISE // If we confirm fitment for your rig and it doesn't fit, return shipping is on us. No restocking fee. That's the deal.

// GETTING IT TO YOUR GARAGE

THIS PART //

Ships UPS/FedEx ground — estimated $49.95. Additional ground items in the same order ship at reduced rates. Exact rate calculated at checkout.

REAL-COST SHIPPING

We charge what the carrier charges — no padding, no games. Ground parcels via UPS/FedEx, signature required. You see the exact number before you pay.

1-2 DAY HANDLING

Most in-stock parts leave the warehouse within 1-2 business days. Built-to-order parts show extended lead times.

LTL FREIGHT FOR THE BIG STUFF

Bumpers, hardtops, axles and full kits ship LTL truck freight (typically $400-500 per unit, plus shipping protection). Freight is charged per unit — two bumpers means two freight charges. Inspect before signing and note any damage on the delivery receipt.

30-DAY RETURNS

Unused, uninstalled parts in original packaging within 30 days. RMA required — start with a quick message. Shipping charges are non-refundable; freight returns quote at carrier rates.

FULL SHIPPING & RETURNS POLICY

// PAY YOUR WAY

CHECKING PAYMENT NETWORK…

ALL MAJOR CARDS + WALLETS

Visa, Mastercard, Amex, Discover, Apple Pay, Google Pay and Link one-tap checkout — live in our Stripe checkout right now. Card numbers never touch our servers.

BUY NOW, PAY LATER — LIVE

Klarna, Afterpay and Zip are active at checkout on eligible orders. Pick your split at payment — get the lift now, pay as you wheel. No JAP paperwork, approval happens right in checkout.

CRYPTO — LIVE AT CHECKOUT

Pay with crypto directly in our Stripe checkout — select the crypto option at payment and settle in USDC and supported coins. On-chain payment, standard order flow, same warranty.

3-D SECURE + RADAR ANTI-FRAUD

Every card payment runs Stripe Radar machine-learning fraud screening, with 3-D Secure (Visa Secure / Mastercard Identity Check) stepping in automatically when your bank requires it. Your card, verified by your bank.

PCI-DSS L1

HIGHEST CARD-SECURITY CERTIFICATION

AES-256 + TLS 1.3

ENCRYPTED IN TRANSIT & AT REST

TOKENIZED

WE NEVER SEE YOUR CARD NUMBER

Payments are processed by Stripe — the same infrastructure behind Amazon, Ford and Shopify checkouts. Dispute protection and receipt trails on every order. See our Privacy Policy.

// COVERED WHEN IT COUNTS

THIS PART //

Backed by the full PSC Steering Components manufacturer warranty. JAP is an authorized dealer — your warranty is valid from day one.

FULL MANUFACTURER WARRANTY

Every part ships new in the box with the manufacturer's standard warranty — terms and duration vary by brand (typically 1 year to limited lifetime on hard parts). We only sell through authorized channels, so coverage is never voided by gray-market sourcing.

WE RUN THE CLAIM WITH YOU

Warranty issue? Don't fight the manufacturer's phone tree alone. Hit our team with your order number and photos — we open the claim with the brand and stay on it until it's resolved.

WHAT WARRANTY DOESN'T COVER

Defects in materials and workmanship are covered. Trail damage, improper installation, modification, and normal wear items (bushings, pads, wear plates) generally are not — that's standard across every brand we carry.

SEPARATE FROM RETURNS

Warranty claims (defects after use) and returns (unused parts within 30 days) are different lanes. Not sure which applies? Message us first — we'll route it the fast way.

START A WARRANTY CLAIM

FITMENT	Jeep - See Description
BRAND	PSC Steering Components — shop all PSC Steering Components parts →
PART #	SG688R
SKU	SG688R
CATEGORY	OEM Parts > Engine > Steering > Steering Components
AVAILABILITY	IN STOCK
RETURNS	30-day return window

Big Bore XD2 Cylinder Assist Steering Gearbox for 2007-18 Jeep JK PSC Performance Steering Components