With the truck up on jacks, the wheels were removed and the hub parts were disassembled. The brake calipers were removed, our DynaLoc hubs were taken off, tie rods were disconnected and tied up out of the way, and with the rotor, dust cover, ABS sensor, and spindle off, the axles were carefully slid out. A rag covered the tube end to keep gear oil in and prevent contamination of the seals.
Now we could finally see the ball joints, or at least the nuts that hold them in place inside the end forging of the axlehousing. The cotter pins were removed and the big nuts (top and bottom) were loosened with a 15/16-inch socket so that a few raps with a big hammer would dislodge the ball joint stems. The lower nut was left in place to prevent the knuckle from falling on the floor.
Now we moved to Dynatrac's 15-ton industrial press to push out the joints. After a thorough cleaning of the knuckle, the new ball joints were pressed in. There is no plastic bushing in the Dynatrac design like the OEM ball joints. The Dynatrac ProSteer ball joint has Teflon-coated precision internal surfaces for long life.
While we had everything apart, the Timken bearings in Dynatrac's Free-Spin replacement kits were inspected and repacked, and new Spicer seals were installed. The DynaLoc hubs were lubricated and checked for any unusual wear.
During reassembly, Craig showed us some important tricks. The lips on the factory camber bushings were machined down 1/8 inch to ensure the new ball joint bodies could be drawn up fully into their place. Craig used a small spacer to keep the camber bushing from fully seating, first tightening the upper nut to draw the lower joint up tight. Because the lower ball stud uses an aircraft-type lock nut, it will spin unless it has been drawn up snug.
To keep the upper stem from spinning, Craig held the top with a second wrench as he tightened the nut. Finally, both were torqued to 150 pounds on the bottom and 75 to 80 pounds on the top, aligning the slots for the cotter pin.
We can now expect years of trouble-free driving from our Super Duty, and when service is needed on the ProSteer ball joints, it will be much easier with a simple rebuild/service kit.
The cost of a full set for both sides of a front axle is $599. Not cheap-but extreme quality, design, and durability have their price. Driven by the mission to give enthusiasts the "Confidence to Explore," for more than two decades, Dynatrac has manufactured drivetrain components built to the exacting standards of the world's most demanding vehicle enthusiasts, including those who dabble in heavy-duty military equipment and extreme off-roading. Dynatrac products are designed and manufactured entirely in the United States.
If your eight-lug diesel is new, keep fresh, clean grease in those joints that have fittings at regular intervals. If you're starting to feel the telltale sign of worn joints-wheel shimmy, clunking during a turn, abnormal tire wear, pulling to one side, or loose steering-the new Dyantrac is a serious upgrade to consider.
Removing our DynaLoc hubs...
Removing our DynaLoc hubs was the first step in taking the bearings and rotor off.
With the DynaLoc hub removed,...
With the DynaLoc hub removed, the main hub and rotor were slipped off.
A small screw on the spindle...
A small screw on the spindle retains the ABS sensor plug.