Yukon Gear 07-18 Jeep Wrangler JK Power Steering Gear Box
The ZSG8417 is a new USA Standard Gear power steering box for the 2007-2018 Jeep Wrangler JK and JK Unlimited. JK owners usually come looking for one after lifting the Jeep and adding 35 in. or bigger tires: the steering gets loose on center, the Jeep wanders in its lane, the box starts leaking at the sector shaft, or the wheel has to be sawed back and forth on the highway. A worn box is not the only cause of those complaints, but when it is, a new unit is the clean fix. This one is new, not rebuilt, with no core to return.
The JK uses a recirculating-ball power steering gear mounted to the front of the driver-side frame rail. The steering shaft turns a worm inside the box, a ball nut riding on recirculating steel balls converts that rotation into movement of the sector shaft, and the pitman arm on the sector shaft drives the drag link and tie rod across the solid front axle. Hydraulic pressure from the pump pushes on the ball nut piston to add assist. Big tires multiply the load the box sees every time you turn at low speed or bump off a rock, so the worm, balls and seals wear faster on built JKs than on stock ones. This box is listed at 3.0 turns lock-to-lock.
JK steering complaints often come from somewhere other than the box, so rule out the cheaper parts first. With the engine running and the Jeep on the ground, have a helper rock the wheel while you watch, in order: the track bar ends, the drag link and tie rod ends, the ball joints, and the box itself. If the input shaft turns while the pitman arm sits still, the slack is inside the gear. If the pitman arm moves but the axle shifts side to side, look at the track bar. Also check the frame where the box mounts; big tires can stress that area. Fluid level and condition matter too, since a starving pump feels like a bad box.
The listing covers the 2007-2018 Jeep Wrangler JK, 2-door and Unlimited. The manufacturer fitment table lists the 2007-2017 Wrangler, and the product name says 2007-18 JK; the JK was built into early 2018 alongside the new JL. The 2018-up JL and the Gladiator use a different steering system and are not a fit. Before installing, match the input shaft, sector shaft and line fittings to your old box, and if your JK has an aftermarket box brace or high-steer conversion, confirm the mounting. Send us your year and VIN if you want us to check. See more parts on our Jeep Wrangler JK and JL page.
Front axle work often goes with steering work on a built JK. If the Dana 30 is noisy, the JK Dana 30 front master overhaul kit covers its bearings and seals, and a Dana 30 chromoly front axle shaft kit is the next upgrade for big tires. Our JK and JL transmission service guide covers the drivetrain behind it.
| Brand | Yukon Gear & Axle |
| Part number | ZSG8417 |
| Fits | Yukon Gear 07-18 Jeep Wrangler JK Power Steering Gear Box |
| Vehicle fitment | Jeep Wrangler Jk Power Steering (2007-2018) |
| Type | Power Steering Pumps |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. It is built for the JK body style, 2007-2018. The JL and Gladiator use a different steering system.
Usually not on its own. Death wobble on a JK is most often caused by a worn track bar, tie rod or drag link end, or ball joints. Replace the box when the play is inside the gear itself.
New, not rebuilt, and there is no core return.
The manufacturer lists 3.0 turns lock-to-lock for this JK box.
Yes. Refill with the fluid your owner's manual specifies, turn the wheel lock to lock with the engine off to push out air, then start it and repeat until the fluid stops foaming.
