PSC SK689R36JP2-8.0W-1.75 Big Bore XD Cyl Assist, JL 3.6L (18-20), 8 Stroke, 1-3/4 Clamp

If you’re running big tires and your JL’s steering feels like a workout, this kit’s your fix. The BIG BORE XD Cylinder Assist Steering Kit is built to handle the abuse of off-roading and the demands of daily driving. It’s got the muscle to turn those tires with ease and the durability to keep you wheeling without worry.

PSC upgraded the stock 70 mm piston to a beefy 80mm for more torque, bumped the sector shaft from 42 mm to 45 mm for added strength, and swapped out the factory electric pump for a reliable belt-driven mechanical one. You get everything you need in one box—steering gear, pump, hoses, cooler, fluid, and your choice of tie rod clamp size.

Whether you’re crawling rocks or cruising pavement, this kit delivers smooth, confident steering that feels right.

This listing is PSC part number SK689R36JP2-8.0W-1.75 (Axle Type: Aftermarket; Axle Stroke: 8in; Tie Rod Clamp Size: 1-3/4in).

Features

• Turns big tires like a champ—no more fighting the wheel
• Built tough with oversized internals for serious strength
• Mechanical pump = consistent power, even under heat and load

Specifications

• Part Number: SK689R36JP2-8.0W-1.75
• Axle Type: Aftermarket
• Axle Stroke: 8in
• Tie Rod Clamp Size: 1-3/4in
• Stroke: 6.75in, 7.5in, or 8.0in Lock-to-Lock (varies by kit)
• Clamp Size: 1-1/4in, 1-1/2in, 1-3/4in, 1-3/8in, 1-5/8in, 2in, or No Clamp
• Piston: 80 mm
• Sector Shaft: 45 mm
• Pump: Belt-driven mechanical

Fitment

• Jeep Wrangler JL/JLU 3.6L Non-eTorque (2018-2020)

What’s Included

• Each kit includes:
• SG689R: BIG BORE XD Steering Gear (not sold separately)
• PK36JP2: High Performance Pump Kit for JL 3.6L Non-eTorque
• Cylinder Assist Axle Kit (stroke length varies by kit)
• Tie Rod Clamp (size varies by kit or not included)
• Hoses, fittings, cooler, anti-splash valve, and PSC fluid