Product Description
PSC Cylinder Assist Steering Kit | 3.6L Non-eTorque | OEM Axle (Wrangler JL 2018+)
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.
We 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.
Kit Includes:
- Big Bore XD-JL steering gear box
- XD pump kit
- Cylinder assist axle kit
- Tie rod clamp
- Hoses, fittings, cooler, anti-splash valve and PSC fluid
- Eliminates excessive on-center steering wheel play
- Eliminates electro-hydraulic pump overheating
- Increased torque output turns up to 35" tires without cylinder assist
- Improved turning capability when locking differentials are engaged
Notes:
** Use HWK-689-PP (available separately) when installing a Synergy MFG Track Bar and Sector Shaft Brace with this product. Using the shorter OEM or the standard 100mm bolts supplied with the XD-JL steering gear box could result in steering gear box case failure
*** The larger size of the Big Bore XD-JL steering gear box may prohibit the use of some aftermarket track bars
**** A Tazer JL Programmer (available separately) will be needed to override the OEM electro-hydraulic pump functions when installing the PSC High Flow Mechanical Pump Conversion Kit
***** Positive caster increases align torque, aka the force that straightens the steering wheel when you move forward, which improves straight line stability of the vehicle. Due to the geometry of positive caster this will also increase negative camber gain when turning, which will enable a wider tire contact patch. The caster angle is a major contributor to directional control. An insufficient amount of positive caster angle will decrease drive effort at the steering wheel, but may make the vehicle too sensitive and twitchy, especially as speed increases. To achieve the best on-the-road driving experience, we recommend front axle caster setting is 7 degrees positive.
