The original steering knuckle...
The original steering knuckle and all steering components are retained. When the kit is correctly installed, there is no effect on wheel alignment.
How To Upgrade
The installation of the Dynatrac conversion kit is straightforward and can be done at home by anyone who knows the basics of repacking wheel bearings. After setting the brake calipers aside, the OEM hubs, brake rotors, and axles were removed; the factory steering knuckle remains in place. All parts were thoroughly cleaned to prevent any contamination. The Dynatrac technician pre-assembled the rotors, dual wheel adapter spacers, and the new hubs on the bench. This makes a rather heavy part to lift and slide over the spindle later. Individual components can be fitted one at a time to the steering knuckle. The dual rear-wheel adapters and brake rotors on the front axles of F-550 and F-450 trucks are considerably heavier than those on F-250 and F-350 models.
Since the OEM stub axle is not reused, we took the opportunity to replace the U-joints on the new 35-spline outer shafts with high-quality Spicer joints. The axles were then slipped back into the axlehousing, aligning the splines with the differential gears. Machined needle bearing housings were mounted on the back of the new spindles, and the larger needle bearings were installed with their seals. After reinstalling the dust shields, the spindles were aligned with the holes in the steering knuckles and secured, and the ABS sensors were fitted to the mounting blocks on each spindle.
The replacement needle bearings...
The replacement needle bearings are significantly larger than those in the factory unit hub.
With the new bearing races installed in the wheel hubs, the bearings were packed with grease. We did it the old-fashioned way-by hand. Make sure you grease the bearings; they come with a protective coating, but they are not greased. The instructions note the importance of making sure you have the correct wheel studs because there are two different types: fine and coarse threads. Dynatrac can supply either one.
After the inner bearings are packed and installed, the complete hub/rotor/dual wheel adapter assemblies can be slid over the spindles, using care not to damage the inner hub seals. Now the outer bearings can be installed with their spanner nuts and tightened to the correct torque. The new Warn locking hubs slide in easily and are held in place by large internal snap rings.