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Project 'Con Artist Moab Renovation

Part 16: Axle Beef And Bigger Meats

By , Photography by Ken Brubaker,

A couple of months before Easter Jeep Safari, we started planning the next phase of Project 'Con Artist. We loved what we had accomplished so far-proving that a daily driven Unlimited JK on 35s could drive to the Rubicon, complete it, and drive home. In fact, we did it twice.

With that demonstrated, we decided we would finally bump up to 37-inch tires for less wear and tear on the 'Con and less fatigue and stress for the driver on those really technical trails. We settled on the BFGoodrich KM2 due to its proven trail reputation, excellent highway manners, and smooth, quiet ride. And of course our decision to increase tire size meant we had to make sure the rest of the vehicle was beefed up accordingly.

The first upgrade we decided to go with was 5.13 gears from G2 Axle and Gear. These gears put the engine RPM in nearly the same range as the 4.88s with the 35s that we have been running. Next, we decided to strengthen up our frontend and ditch the bent stock housing for a super-strong Dynatrac ProRock 44 housing.

The ProRock 44 is an all-new axlehousing that is designed from the ground up and comes with thicker axletubes, stronger end forgings, and offers the highest ground clearance of any Dana 44 axle. For TJ and JK applications, Dynatrac already has the brackets in place, making the axle a direct replacement. Because the ProRock 44 is available as a raw or empty housing, it allows you to transfer over all of the guts and wheel ends from your current stock housing or upgrade them as needed.

While we were busy swapping the front housing and gears, we also replaced the factory 30-spline front axleshafts with 4340 chrome-moly Discovery Series shafts from Superior Axle & Gear. This is a nice complement to the 35-spline Superior axle conversion that we were already running in the rear axle.

Another upgrade that we included was Reid Racing's heavy-duty JK knuckles. These direct replacement ductile iron knuckles have additional ribbing for strength and raise the tie rod 1.5-inches to minimize trail vulnerability. The Reid Racing parts maintain proper steering geometry on common lift heights of 3 to 4 inches by flipping the drag link.

While the front end was apart, we removed the Light Racing JounceShocks and had them rebuilt and retuned. Light did a great job going over the JounceShocks and returned them good as new, but with much more compliance, making for an improved ride over harsh terrain.

In last month's issue (July '10, pg. 72) we covered the addition of Bilstein's new 5160 remote-reservoir shocks, which have made a noticeable difference in the ride quality of our JK. In addition to the new Bilstein shocks, we also installed Bilstein's new monotube steering stabilizer.

Lastly, we gave our Rubicon Express Long Arm kit a thorough going over. We replaced tired bushings and lubricated and inspected each of the Rubicon Express Superflex joints.

We owe a big thank you to the hard-working crew at Off Road Evolution in Fullerton, California, who made time for us during the extremely busy rush leading up to Moab Easter Jeep Safari. Check out all of our upgrades in photos below.

  • With the 'Con securely placed on the rack, we started off this marathon install by removing the old 4.88 gearset from our Sahara rear axle and replaced them with a new G2 5.13 gearset. We retained the 35-spline Superior chrome-moly axleshafts and ARB Air Locker from a previous install. You can also see the Bilstein 5160s here.
    With the 'Con securely placed on the rack, we started off this marathon install by removin
  • After the rear gears were completed, we removed the bent front axle assembly. We already had the optional taller 4-inch coil springs from Rubicon Express, so no suspension modifications were required to fit 37s.
    After the rear gears were completed, we removed the bent front axle assembly. We already h
  • On the bench, we installed the front set of 5.13 G2 gears with the factory front locker in to the ProRock 44.
    On the bench, we installed the front set of 5.13 G2 gears with the factory front locker in

How It Works
Immediately after finishing the build we packed up the Jeep and drove to Moab for Easter Jeep Safari, where we wheeled all week before driving home. Despite our lack of time for a shakedown run, the Jeep performed flawlessly. We are still enjoying the awesome ride-thanks to the new Bilstein 5160s-and couldn't be happier with the BFG KM2s.

Even after some heavy-duty trail use and a few hard crashes over terrain at high speed, our ProRock 44 is as true as the day it left Dynatrac, with even our alignment holding steady over the course of our trip. We hit several trails and enjoyed 100-percent reliability.

All buttoned up and ready to go, we drove Project 'Con Artist to Moab and back-a 1,600-mile trip.
All buttoned up and ready to go, we drove Project 'Con Artist to Moab and back-a 1,600-mil

For those of you who are interested in fuel economy numbers, we recorded an average of 13.3 mpg and a tank-high of 15.6 mpg during the Moab trip.

Project 'Con Artist continues to be a testbed for new products, and because of that it is somewhat of a Frankenstein vehicle. Despite all of this, it retains everyday drivability and exceptional off-highway capability. With no bad manners, it represents a truly multi-purpose vehicle. Thanks to advancements in off-highway technology, we have been able to build a comfortable daily-driven 4x4 that has never let us down on a trail-a tribute to just how far this sport has come.

  • Note that the unique shape of the ProRock 44 housing allows for maximum ground clearance. Dynatrac also included its stout nodular iron differential cover for additional protection.
    Note that the unique shape of the ProRock 44 housing allows for maximum ground clearance.
  • On the steering front, we went with a set of Reid Racing high clearance steering knuckles. The knuckles raise the tie rod 1.5-inches to bring it out of harm's way and closer to the axle centerline. You can see that the mounting ear (arrow) for the tie rod is higher on the Reid knuckle (left) when compared to the stock knuckle (right).
    On the steering front, we went with a set of Reid Racing high clearance steering knuckles.
  • After installing the Reid knuckles, we positioned the ProRock 44 to be mated with the front of the 'Con.
    After installing the Reid knuckles, we positioned the ProRock 44 to be mated with the fron
  • With everything pulled apart, we took the opportunity to send our JounceShocks back to Light Racing for a once-over. They rebuilt the units and sent them back within a couple of days.
    With everything pulled apart, we took the opportunity to send our JounceShocks back to Lig
  • Because of the Pro Rock's thicker axletubes, we returned to the Rubicon Express Extreme-Duty Front Track Bar and used the necessary drop down bracket on the frame-side to complete the component changeover.
    Because of the Pro Rock's thicker axletubes, we returned to the Rubicon Express Extreme-Du
  • Here we are installing the suspension arms to the ProRock 44. Before this step, and while everything was apart, we freshened up the Rubicon kit by swapping out the bushings and checking all of the joints.
    Here we are installing the suspension arms to the ProRock 44. Before this step, and while
  • The next step was the installation of the Superior Discovery Series axleshafts and the factory front brakes. The Superior shafts use the same large U-joint as the factory Rubicon axle, which has mistakenly been referenced in the JK community as a 1350. It is actually just a bit smaller.
    The next step was the installation of the Superior Discovery Series axleshafts and the fac
  • Because of the extent of frontend modifications and to give us some flexibility, we ordered our ProRock 44 without sway bar tabs. Here you can see the tabs that we welded on as well as the Evo Manufacturing HD Endlinks that we used.
    Because of the extent of frontend modifications and to give us some flexibility, we ordere
  • We then reinstalled the existing Poly Performance drag link and tie rod, along with our new Bilstein monotube steering stabilizer.
    We then reinstalled the existing Poly Performance drag link and tie rod, along with our ne
  • Due to all of the modifications we made to our steering setup, space was a premium. The bigger body of the Bisltein necessitated that we make this special steering stabilizer mount. On a stock setup, the steering stabilizer is a direct replacement part.
    Due to all of the modifications we made to our steering setup, space was a premium. The bi
  • The finished frontend assembly is visible here. You can also see the Rubicon Express track bar installed. Also note the new position of the tie rod that gives it increased ground clearance over stock. Believe it or not, there were no major interference issues and everything worked well together.
    The finished frontend assembly is visible here. You can also see the Rubicon Express track
  • The last order of business was to install our new BFGoodrich KM2 tires. We ordered a set of five 37x12.50R17 tires and had them mounted on our Walker Evans wheels.
    The last order of business was to install our new BFGoodrich KM2 tires. We ordered a set o
SOURCES
BFGoodrich Tires
P.O. Box 19001
Greenville
SC  29602
877-788-8899
www.bfgoodrichtires.com
Light Racing
4045 Specialty Place
Longmont
CO  80504
800-525-6505
www.lightracing.com
Dynatrac
7392 Count Circle
Huntington Beach
CA  92647
714-596-4461
www.dynatrac.com
EVO MFG.
N/A
AK
714-870-5515
www.evomfg.com
Superior Axle & Gear
9580 Commerce Center Drive
Rancho Cucamonga
CA  91730
888-845-0470
www.superioraxlegear.com
Reid Racing
1917 Oak Park Blvd.
Pleasant Hill
CA  94523
925-935-3025
http://www.reidracing.biz/
Bilstein
14102 Stowe Drive
Poway
CA  92064
858-386-5900
http://www.bilsteinus.com
Off Road Evolution
1829 W Commonwealth Avenue
Fullerton
CA  92833
714-870-5515
www.offroadevolution.com
Rubicon Express
3290 Monier Circle
Rancho Cordova
CA  95742
877-367-7824
www.rubiconexpress.com
G2 Axle & Gear
400 W. Artesia Boulevard
Compton
CA  90220
310-900-2687
www.g2axle.com
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Canadianbacon
Those wheels are the perfect set for every vehicle I've seen them on.
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