1. Remove vehicle’s existing hub assembly (dust cap, axle snap ring, lock ring, drive flange,
spring and oil slinger ring).
2. Set aside removed components.
3. Clean and remove corrosion from wheel housing,
paying close attention to locking ring groove.
4. Put a light coat of motor oil on the axle shaft and the
wheel housing splines.
5. Insert the Mile Marker body assembly (Item 3) into the
wheel housing. Line up the axle splines first, then rotate
the outside of the body assembly until the wheel housing
splines line up. Slide body assembly in. You may need to
lift the axle up slightly to center wheel bearing free play.
Lock Ring
Axle Snap Ring
Dust Cap
Axle Splines
Axle Shaft
Wheel Housing Splines
Drive Flange
Spring and Oil Slinger Ring
2121 Blount Road, Pompano Beach, FL 33069 www.MileMarker.com 1.800.886.8647
PAGE 1
ITEM
DESCRIPTION
PART NUMBER
1
Allen Head Screw
449.14
2
Cap Assembly
449.CAS
3
Body Assembly
449SS
449.BA
4
Alignment Pin
N/A
5
Lock Ring
449.09
6
Spirolox
105.15
Installation Instructions:
6. Grasp the spirolox (Item 6) and spread it apart with your fingers. Angle the entire lock ring (Item 5) away from face of the
body assembly so that the inboard can be inserted into the ring groove in the truck. Maintain the angle and continue to insert
the lock ring in a spiral manner until the lock ring is installed. Insert into the groove of the wheel housing. These hold the body
assembly into the housing.
7. If axle groove is visible, you can now install the optional factory axle snap ring.
8. Cap Assembly (Item 2) (See diagram on page 2)
A) Set the dial on the cap assembly to FREE.
B) Place the cap assembly over the opening on the wheel housing.
Ensure that the alignment pin is in place.
C) Ensure the ends of the cap springs are lined up with the base of the ramps
on the cam of the Mile Marker body assembly.
9. Install the six Allen head screws.
10. Turn dial to lock, then back to free, ensuring the assembly moves freely.
Axle Splines
Axle Shaft
Wheel Housing Splines
3
1
2
4
5
6
Part Number 449SS
PREMIUM LOCKING HUBS
