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Jeep JK Rock Jock Centersection - 4Wheel & Off-Road Magazine

Jeep JK Rock Jock Centersection - Ironman Jocks

Jerrod Jones Former Editor, Off Road Photographers: Currie Enterprises jeep Jk Rock Jock Centersection rear Axle Photo 9290695

When Currie's aluminum Rock Jock debuted a few years ago, it came on the market as a great com-petitor's axle. Its lightweight SAE 206-T6 aluminum centersection (26 pounds!) mixed with hardcore heavy-duty parts gave many of its owners a winning advantage over standard axles with their covers slung in a vulnerable position. It found a home in many trail rigs as well, and we even know people who drive daily on them.

jeep Jk Rock Jock Centersection differential Model Photo 9290704

But aluminum axles are generally not recommended for your everyday street truck or Jeep. So Currie decided to introduce a new, more competitively priced ductile iron Rock Jock centersection that still weighs in at less than a standard Dana 60 pumpkin, keeps the differential cover at 60 degrees (true to the Rock Jock design), and maintains the highest ground clearance (for a 60) on the market.

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The ductile iron Rock Jock case has the same dimensions as the aluminum Rock Jock but is 50 pounds heavier and $400 lighter. It features the same flow-through circulating oil system exclusive to Currie units (as shown in the diagram on the lead page). The iron Rock Jock features a case that you can put in 1-ton trucks and drive daily without worrying about it. Bolted to the bottom of the Rock Jock is the same AR400 steel "jockstrap" Currie puts on the bottom of the aluminum centersection so it slides better.

Six buttonhead Allen bolts go through threaded bosses cast into the centersection and into the axletubes, making for an almost unbreakable bond. Currie's bridge support for upper suspension mounting points bolts on as well, since the extreme 60-degree angle of the cover makes it difficult for welding suspension points directly to the pumpkin, since you'd be welding to the diff cover. The centersection weighs 59.6 pounds, still 15 pounds lighter than a standard Dana 60 case.

Speaking of diff covers, we're not even supposed to be showing you this, but take a look at this steel diff cover. It's a new differential cover that Currie is testing for a company and would allow Currie to put an upper suspension mounting point directly on the cover. With any luck, you'll see this in production soon and as part of the Currie JK axle transplant kit.

ABS sensors and tone rings are key elements to axle building for newer truck owners. Without them, onboard computers tend to go a little haywire and can give you a whole lot more problems than just losing your ABS brakes. Currie can outfit its Rock Jock axles as well as its 9+ axles with necessary sensors to make your rig work right.

We're jumping the gun on this one here, but these are the new Rock Jock JK replacement axles. The Rock Jock JK housings are made with all the brackets and mounting points to hook up to the factory-style suspension under JKs while utilizing the outers (front and rear) of the original axles. In the rear, you just bolt the factory brake bracket and disc brakes back on, retaining all the sensors. In the front, the JK Rock Jock will reuse the factory knuckle and retain the brakes and sensors there as well. On a side note, in the photo you can make out a few of the pieces of the new Currie JK suspension kit that this Rock Jock is hanging from.

Here's another shot of Currie's prototype JK Iron Jock. Both upper and lower control arm points have multiple mounting holes in them to give you more adjustability in the suspension's control arms and shocks. If you don't like the extra metal below your lower control arm, just hack it off. Even at uncut length, it still doesn't hang any lower than the factory mounting points on the stock JK axles.

Jeep JK Rock Jock Centersection - 4Wheel & Off-Road Magazine

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