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Installation Instructions for DYNATRAC Conversion Kits

KLM PERFORMANCE IS THE EAST COAST DISTRIBUTOR FOR DYNATRAC FREE SPIN HUB KITS. KLM PERFORMANCE HAS ALL DYNATRAC FREE SPIN HUB KITS IN STOCK. NEED THE KIT TODAY? CALL US BY 3:00 P.M. AND IT WILL SHIP TODAY. WE DON'T DROP SHIP.

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IF YOUR TRUCK IS DOWN AND YOU NEED THE KIT NOW, CALL KLM PERFORMANCE.

Dynatrac hubs are a world apart. Click here to read more and for comparison pictures showing the difference between OEM hubs and Dynatrac hubs. Many people who appear to be using their trucks under normal conditions -- stock tires and light-duty use -- have experienced failures within the first 50,000 miles of ownership. Officially, Ford says the unit bearings are a "nornal wear" item, and therefore not covered by warranty at any mileage level. Furthermore, some dealers are approving the work under warranty on a case-by case basis. One-time repairs at a dealership can easily exceed $1,500. Fortunately, there is now a fix.

Installation Instructions for Dynatrac Hub Conversion Kits

Some of the less common tools, which will be required:

·         6 point Spanner socket (OTC #7090-A or equivalent) OR 4 point Spanner socket
(OTC #7158 or equivalent). These can be purchased from Dynatrac or a good auto
parts store.

·         Torque wrench

·         Loc-tite thread locking compound

Preparation, Inspection and Clearance Checks

1.      Read all instructions completely. Only perform this installation if you are an experienced, fully equipped mechanic. Inspect all boxes and packing material to expose all the parts in the kit. Using the bill of material attached, verify that the kit is complete. Contact Dynatrac about any shortages. Do not start the installation until you are sure you have everything you need. Allow yourself plenty of time. You will need anywhere from 3 to 7 hours depending on your skill and experience level.

WARNING: Only perform this installation if you are experienced, fully equipped mechanic.

WARNING: Always wear proper safety equipment including safety glasses and gloves while working with tools.  Improper use of tools and equipment can cause injury or death.

2.      This kit MAY NOT be compatible with Dual Rear Wheel (DRW) trucks equipped with the 8 on 170mm wheel pattern (usually on some F350 and F450):

a.      Trucks equipped with the 8 on 170mm DRW wheels WILL require modification to the stock DRW front wheel adapter. Due to inconsistencies in the stock part, Dynatrac CANNOT predict the extent of the modifications in all cases. The center bore will likely be too small to fit over the new Dynatrac wheel hub.

b.      If your truck is 8 on 170mm DRW equipped, test fit your DRW front wheel adapter on the new hubs BEFORE installing the kit. If the parts cannot be properly mated by grinding off the “casting flash” on the inside diameter of the stock adapter (1/16” maximum removed per side), STOP!!  DO NOT weaken the adapter by removing too much material from the inside of the casting! DO NOT remove material from the new Dynatrac wheel hub. At this point you may return the kit to the place of purchase for a full refund, or you may replace the stock adapter with a suitable aftermarket part. Contact Dynatrac if you need assistance.

WARNING: Removing too much material from the inside of the Stock DRW front wheel adapter may weaken it, and cause the wheel to separate from the vehicle without warning. This may cause property damage, injury or even the death to your vehicle’s occupants and those in vehicles around you. You may choose to stop now and return this kit for a full refund. Or you may replace the stock adapter with a suitable aftermarket part. Contact Dynatrac if you need assistance.

3.      This kit has been designed to be compatible with:

a.      It is designed for all stock suspensions and does not interfere with most commercially available lift kits.

b.      All stock wheels. It also does not interfere with most commercially available aftermarket wheels.

c.      F250/350 Single Wheel (SRW) trucks equipped with the 8 on 170mm wheel pattern, and Dually Wheel (DRW) trucks equipped with the 8 on 225mm Bolt pattern (usually F450/550).

d.      Tires up to 40” tall and 18.5” wide.

WARNING: Never violate the tire manufacturer’s guidelines for rim compatibility.

WARNING: Never violate the vehicle manufacturer’s guidelines for Gross vehicle weights (GVW) or Gross Axle weight ratings (GAWR). This Kit does NOT increase the rated load capacity of your vehicle.

4.      This kit requires that the front locking hubs be manually engaged and disengaged when 4-wheel drive is used. The auto-locking hub feature, available on some vehicles, will no longer function.

iINFORMATION: If you had automatic vacuum hub locks they will be replaced by manual locking hubs.

5.      Inspect all parts first. If a part looks damaged or does not appear to fit or function correctly, then contact Dynatrac for a replacement part. Dynatrac cannot give any credit or refunds on altered or abused parts.

6.      If your truck is ABS equipped make sure the new hubs have tone rings mounted on the short side of the new hubs.

WARNING: If tone rings are not installed on your hubs, the ABS system will not work.

7.      Inspect the inside of the new wheel hubs for any debris or dirt. Wash the inside thoroughly with rags, solvent or hot soapy water.

8.      Compare the wheel studs in the kit with your stock wheel studs. Ford uses 2 types of wheel studs. Type 1 is 14mm x 2.0 thread pitch (coarse) and is most common. Type 2 is 14mm x 1.5 thread pitch (fine). If the studs in the kit do not match your stock studs, you may contact Dynatrac for replacements. If your truck is a dually compare against the studs that hold the DRW Adapter in place, instead of the wheel studs.

CAUTION: Confirm that you have the proper wheel studs to match your current lug nuts before pressing the wheel studs into the new hub.

9.      Raise the front axle off the ground and secure with jack stands. Remove the wheels. Remove the calipers and hang them from the frame without disconnecting the brake hoses. Remove the rotors (SRW) and DRW Adapters (DRW ONLY).

WARNING: Always use appropriate jack stands when raising your vehicle.  Never work under a vehicle that is not properly secured.  Be sure to chock any wheels that are on the ground.

10. Single Wheel (SRW) Vehicles - There are 2 pilot diameters machined on the outer end (long side) of the new wheel hubs. The inner pilot (larger diameter) is for the rotor and the outer pilot (next one down) locates the wheel. Make sure that the rotor and the wheel fit easily but closely around their respective pilot diameter. Trial fit the new wheel hubs on both sides of the truck with your rotors and wheels at this time.

11. Dual Wheel (DRW) Vehicles - There are 2 pilot diameters machined on the outer end (long side) of the new wheel hubs. The inner pilot (larger diameter) is for the Rotor and the outer pilot (next one down) locates the DRW Adapter. The rotor will be sandwiched between the new hub and the DRW Adapter. Make sure that the rotor and the DRW Adapter fit easily but closely around their respective pilot diameter. Trial fit the new wheel hubs on both sides of the truck with your rotors and DRW Adapters at this time.

iINFORMATION: The DRW Adapter fits very snug on the new hubs. DO NOT FORCE THE ADAPTER INTO PLACE. Make sure the inside of the DRW Adapter is clean and free of nicks. Use sand paper to remove any rust, dirt or imperfections. Use brake cleaner to remove paint from the locating pilots on the new wheel hubs if necessary. Apply Anti-seize or other lubricant to allow the parts to fit snug, but seat fully together. Trial fit all parts on both sides of the truck before assembly.

Begin Front Axle Teardown:

12. If truck is equipped with front ABS: Remove the sensor and cable from the unit bearing. It is held in with only 1 screw, and pulls straight out. Tie off and out of the way. At this time make certain that the hubs included in the kit have ABS tone rings pressed on to the short side of the hub. If the hubs do not have the tone rings mounted, contact Dynatrac immediately for replacements.

WARNING: If tone rings are not installed on your hubs, the ABS system will not work.

CAUTION: Be careful not to damage the ABS sensor while removing it from the unit bearing.

13. Remove the stock locking hub. Use needle nose plies to squeeze the snap ring tabs together. The hub is held in with the snap ring only. Wiggle and pull firmly to remove.

CAUTION: Wear safety glasses at all times when working with tools.

14. Remove the external snap ring that is around the axle shaft inside the opening of the unit bearing. There are also some washers. Set these parts aside. They will not be re-used.

15. Remove the unit bearing assembly. It is held in with (4) 14mm nuts (requires 21mm socket) located on the backside of the stock knuckle. Set aside.

16. Remove the axle shaft assembly. It is only held in by tight seal tension at the differential. Use 1 or 2 pry bars behind the u-joint yoke, and the end of axle housing to pull straight outward. Set aside.

17. If equipped, remove the vacuum hose that activates the auto locking hub feature, from the top of the knuckle. Plug the vacuum circuit and secure the loose end of the hose. It will no longer be used.

18. Use the original nuts that held the unit bearing in place to remove the 4 studs from each unit bearing. You can accomplish this by stacking 2 nuts on each stud and tightening them against each other. Then using a wrench, you can loosen the stud and unscrew it from the unit bearing assembly. Repeat this until you have all 8 studs free for re-use on the new spindle assemblies. Set them aside.

19. Separate the stock outer axle shaft stubs from the stock inner axle shafts by pressing out the U-joint. If the old joints are suspect or worn out, this is the best time to replace them. Dynatrac stocks Spicer and other high quality joints. They can usually be shipped that same day via next day air.

iINFORMATION: Replace old U-Joints if they appear worn.

Begin Axle Assembly:

20. Assemble the new 35-spline outer shafts onto the stock inner shafts by pressing in the U-joints.

21. Clean the shoulder of the outer shaft with solvent. Apply a small film of silicone gasket sealer to the shoulder. Press (usually by hand) the shaft dust boot over the shoulder on the outer axle shafts as shown in Illustration A. Remove any excess silicone. After the silicone sets it will help hold the boot in place.

CAUTION: Wait 20 minutes before assembly so that the silicone will cure properly and seal fully.

22. Make certain that there is no loose dirt or debris inside the tubes of the axle housing. Clean out as needed. DO NOT PUSH DEBRIS INTO THE GEAR HOUSING when installing axle shafts.

CAUTION: Clean the inside of the axle tubes so you don’t contaminate the inside of the axle with dirt when you reinstall the shafts.

23. Put some grease on the splines and seal surface of the inner shaft, then insert into the axle housing. Guide the shaft up into the seal and gears. Use a rubber mallet to tap the end of the shaft inward until it stops. You may have to rotate the shaft to align the splines in the differential.

24. Apply a drop of Loctite to one end of the original unit bearing studs and install them into the new spindles. THEY MUST BE FULLY THREADED into the flange of the spindle.

WARNING: The original unit bearing studs must be FULLY threaded into the flange of the new spindle.

25. If not already pre-assembled, mount the needle bearing housing onto the back of the new spindle. The counter bored holes should face upward, and line up with the threaded holes in the back of the spindle. The needle bearing housing has a very close tolerance fit to the back of the spindle, but should go on by hand. Lightly tap if necessary. Apply a drop of Loc-tite and tighten the ¼-20 cap screws to 15 ft lbs.

26. If not already pre-assembled, press the small seal/thrust washer assembly into the back of the needle bearing housing. See Illustration A. If they have somehow separated they can be easily snapped back together.

27. ABS Equipped Only: If not already pre-assembled, using the 5/16-18 x .75” screw. Bolt the ABS sensor mounting block in the notch of the spindle flange. It should protrude toward the threaded end of the spindle. Tighten securely.

28. Coat the area over the thrust washer with plenty of grease. Also generously coat the inside if the dust boot on the outer axle shaft with grease.

29. Replace the sheet metal dust shield between the knuckle and the new spindle. Slide the new fixed spindle assembly over the end of the shaft and align the studs with the holes in the knuckle. Make sure the ABS sensor-mounting block is located in the 12 o’clock position.

30. Push the spindle on until it is fully seated with the knuckle. Install the stock 14mm nuts and torque to factory specifications or 140 ft lbs.

WARNING: Use a calibrated torque wrench on all bolts.

31.  If the bearing races are not already installed in the wheel hubs, use a race driver or equivalent to install them at this time. Snap-on, 9/16 race driver, #PPC14LA works great. If you don’t already have one, buy it. You’ll be glad you did.

32. Review Step 7. Do you have the correct wheel studs? If so, drive or press new wheel studs supplied in the kit, into the new wheel hubs at this time. DO NOT attempt to re-use the old studs. DO NOT pull the studs through with a lugnut as this will risk your safety and the safety of those around you on the highway. The new studs should go in very tight but be fully seated.

WARNING: DO NOT attempt to re-use the old studs. DO NOT pull the studs through with a lug nut as this will risk your safety and the safety of those around you on the highway.  Improperly installed studs can cause major failures that could lead to injury or death.

33. In the new hubs, fill the area between the races with new, quality, disc brake wheel bearing grease. Fill completely to the inside edge of the inner & outer races. Don’t skimp on the grease.

34. Pack the new wheel bearings with grease. Load the inner bearing into the new hub and press the seal into the back of the hub. Use your finger to fill the area between the lips of the seal with grease.

35. After fully packing with grease, install the new wheel hubs onto the spindles. Be careful not to damage the hub seal as it slides over the threaded end of the spindle. Push the hub onto the spindle until the inner bearing bottoms out. Push the outer bearing over the end of the spindle and into the open end of the hub. It must seat against the outer race in the wheel hub. DO NOT use the spanner nuts to force the hub and bearings onto the spindle. If necessary, you may gently use a rubber mallet to tap the outer edge of the hub.

 CAUTION: Be careful not to damage the hub seal when installing it over the threaded end of the spindle.

WARNING: DO NOT use the spanner nuts to force the hub and bearings onto the spindle. If necessary, you may gently use a rubber mallet to tap the outer edge of the hub.

36. Screw the inner spanner nut onto the end of the spindle. There are 2 types of spanner nut sets, 4 point & 6 point. On the 6-point style the inner and outer nuts are identical. On the 4 point style, the inner nut has a tiny pin which must face outward. Torque the inner nut to 50 ft lbs while rotating the hub. Then back off the inner nut approximately 1/8 to ¼ of a turn. See page 1 for sourcing the proper hub socket. DO NOT use punches to tap the nuts around.

WARNING: Use the proper tools and procedure to install the spanner nuts or you may damage the bearings.

37. For 4 point spanner nuts only:  Align the pin on the inner nut with a hole in the lock washer. The tab on the inside of the lockwasher must align with the slot in the spindle at the same time. Be careful not to tighten or loosen the inner nut too much to achieve alignment. The hub should spin freely with no pre-load on the bearings, but not have more than .001” of end play. Only after the washer is fully seated against the inner nut, may you screw on the outer nut (has no pin). Tighten the outer nut to 70-75 ft lbs.

WARNING: When installing a 4 point style spanner nut, the inner nut pin MUST face outward.

38. For 6 point spanner nuts only: Install the star shaped lockwasher with the outer tabs pointing outward. Align the tab on the inside of the washer with the slot in the spindle. Put coat of grease on the back of the outer spanner nut. Screw the outer spanner nut on the spindle and tighten to 65-70 ft lbs. Then bend at least one of the tabs over the front of the outer nut into one of the 6 points on the nut. The hub should spin freely with no pre-load on the bearings, but not have more than .001” of end play.

39. Install the new premium locking hubs. The gear body just slides in, and is held in place by the big internal snap ring. A second set of big internal snap rings is supplied with the kit. Install the additional snap rings over the first set. The combined thicknesses of both snap rings provide proper clearance. Do not leave them out.

CAUTION: Further instructions are included with the locking hubs follow them for proper installation.

WARNING: A second set of big internal snap rings is supplied with the kit. Install the additional snap rings over the first set.

40. The small snap ring goes over the tip of the outer axle shaft. The cap is held on by the 6 small allen screws. Do not over tighten the small allen screws. Check the hubs by locking and unlocking several times. Never use tools to turn the knobs, only bare hands. Rotate the wheel forward and backward while simultaneously turning the knob if you feel too much resistance.

WARNING: Never use tools to turn the knob on the locking hub; it should turn without the use of a tool.

41. ABS Equipped Only: Insert the ABS Sensor into the mounting block on the spindle. Use the stock screw to secure it. There should be an air gap between the tone ring and the tip of the sensor between .015” and .055”.

WARNING: Make sure that the ABS sensor has at least .015” clearance between the tip of the sensor and the tone ring.  If the ABS sensor contacts the tone ring it can be damaged resulting in the ABS system to malfunction.

42. Install the stock brake rotor over the outside of the wheel hub and hold it in place with 2 lug nuts. Route the cable for the ABS sensor so it will NOT touch the inside of the rotor during vehicle operation. Secure as needed. DRW equipped trucks will need to re-install the DRW wheel adapter at this time.

WARNING: Make sure that the ABS sensor cable is secure and clear of the rotor.

43. Put the caliper back over the rotor and note the space between the mounting bracket on the caliper and the mounting ears on the stock knuckle. Each kit includes 2 sets of spacers to fill this gap. There are different rotors used on Ford Super Duties that require different thickness of spacers. Use the correct thickness of spacer and reinstall the large special bolts that hold the caliper to the ears on the knuckle. Tighten the bolts to factory specs. Spin the rotor and make certain that the caliper has adequate clearance from the brake rotor. You should never use more than one spacer at each caliper bolt. You should also never use spacers of different thickness at the top and bottom of each caliper.

WARNING: Choose the correct thickness of spacer and reinstall the large bolts that hold the caliper to the ears on the knuckle. Check for adequate clearance between the brake rotor and the caliper.

44. Mount the rims and tires. When correctly installed, this kit does not affect or alter the front wheel alignment.

45. Re-checks of torque on all fasteners at 100 and 500-mile intervals is absolutely necessary for safety. Keep re-checking all bolts until torque is maintained. Especially, do not forget the following:

a.      Wheel hub endplay and lug nut torque.

b.      Brake caliper mounting bolts.

c.      Wheel lug nuts.

d.      DRW Wheel adapters – if equipped.

WARNING: Check your bolt torques per instructions and replace any bolts that do not maintain torque.  Loose bolts can cause a mechanical failure that could lead to injury or death.

iINFORMATION

Proper Use Of Locking Hubs and 4-Wheel Drive:

1.      To Engage 4WD:

a.      Stop the vehicle and turn the locking hub knobs clockwise to the “Lock” position.

b.      Rock the vehicle forward and aft just a couple of feet at least twice to give the hubs a chance to fully engage.

c.      Now you may engage the 4WD button (electric models) or by moving the transfer case shift lever to 4WD. You are ready to go.

2.      To Disengage 4WD:

a.      Stop the vehicle and shift the transfer case back to 2WD, or release the button on the dash to switch back to 2WD.

b.      Turn the locking hub knobs counter-clockwise to the “Free” position.

c.      Rock the vehicle forward and aft just a couple of feet at least twice to give the hubs a chance to fully disengage. You are ready to go.

Proper Wheel Bearing Maintenance:

1.      NORMAL CONDITIONS - Inspect and/or adjust front wheel bearing assemblies every 30 months or 30,000 miles whichever comes first.

2.      Harsh conditions may require more frequent attention.

3.      If the cap of the locking hub has been submerged under water for more than 1 minute, or is frequently submerged, then the hubs should be inspected as soon as is reasonably possible. In most cases service will not be required, but if enough water penetrates the assembly, the locking hubs and or wheel bearings can be damaged if left un-attended.
 

Bill of Material: