SUPER DUTY

control of the turbocharger’s variable vanes via the optional Speed Brake controller for additional braking on downhill grades.

Part Two covered upgrading the front end with a tough Throttle Down Kustoms steel front bumper. This not only improved the look of the truck with its aggressive styling and near-perfect fitment, but it offers added protection against potential run-ins with wildlife on backcountry highways in the middle of the night. The optional push bar was the perfect place to mount an additional light bar to help light up those lonely, desolate mountain highways.

In this installment, the front and rear differentials will get some love with a muchneeded fluid service and new high-flow covers from One Up Offroad (OUO). These covers help improve oil flow to the bearings for extra insurance against ring and pinion troubles while towing heavy. The front end of the truck will get some attitude adjustment with the OUO Adjustable Coil Levelers (ACL), which can raise the front suspension up to 2.5 inches over stock for better tire clearance and overall looks.

OUO DIFF COVERS

With 140,000 miles on the odometer and no knowledge of the previous owner’s maintenance schedules, more often than not you’ll find the differentials and transfer case services get neglected, so to be sure everything is fresh it’s always a good idea to flush and fill them with new fluid after buying a used truck. On the 1999+ four-wheel-drive Super Duty Ford, the Dana 60 front axle and Ford 10.5 rear axle offer great strength and functionality, but their basic differential covers’ lack of drain plugs and their silicone seals make servicing a messy and tedious job. Looking to solve some of these issues, the crew at One Up Offroad engineered what they refer to as a high-flow cover that can increase bearing life due some specific internal characteristics cast into the cover for better oiling within the differential gear set.

After consulting directly with Dana Spicer, the manufacturer of the Dana 60 axles used on the 1999-2016 Super Duty trucks, OUO determined that increasing the overall oil volume wasn’t really needed. Spicer’s failure analysis just didn’t back the claims of axles overheating or lacking oil volume. OUO determined that an aftermarket cover that could help the ring gear splash oil onto the pinion bearings more efficiently was the best way to improve longevity of the axles and internals. OUO had also noticed finding an aftermarket front differential cover for these trucks that would clear the factory tie-rod, track bar and track bar bracket was virtually impossible. With this data to work with, the OUO cast-aluminum cover was developed to fit any Ford Super Duty, regardless of its suspension height or the use of high-strength axle trusses.

 Assembling the adjustable perch is simple: Thread the lock collar onto the threaded post, slide the spring perch washer onto the post, and then the spring isolator. Don’t forget the Allen head bolt to tighten the lock collar into place once the...

 With the factory coil springs removed from the truck, you can then unbolt the lower spring perch from the axle and discard; the new OUO leveler adjustable mount will replace it.

 Next, disconnect the sway bar end links from the sway bar, disconnect the brake line bracket, and the ABS line from the axle. This will allow you to lower the axle away from the truck; you’ll need to drop it far enough to remove the factory coil...

The level kit install is straightforward and can be done in just 1-2 hours with basic hand tools. This truck was raised in a home garage without the use of air tools. To start, you need to get the front coil springs out of the truck. With the frame...