05-03-97 Page 4

b.    For 4X4 vehicles equipped with the Dana 60 front axle (8800 lb. GVW 2500 series 4X4 and all 3500 series 4X4), remove the cotter pin that secures the hub nut to the axle shaft. The measurement will be taken at the hub nut with a torque wrench. The hub nut on a Dana 60 front axle is a I 1 111 6 inch hex head nut.

4.    Rotate the hub/rotor assembly in a forward direction. The initial torque required to get the hub to rotate is called 'break away torque." The break away torque will be higher and should be disregarded. **Measure and record the rotational torque of the left front wheel. Then, measure and record the rotational torque of the right front wheel. The difference between the left and right side rotational torque should be less then 20 Nm (15 ft. lbs.) of torque.** If the measured torque exceeds the maximum specification, remove the front wheels and proceed to the next step. If the measured torque is within specifications, remove the front wheels and proceed to Step 6.

5.    **Remove the caliper assembly from the side of the vehicle that has the higher drag torque and rotate the hub, bearing, and rotor assembly in a forward direction.**

WARNING:    USE EXTREME CAUTION WHEN HANDLING THE WHEELS AND BRAKE COMPONENTS. THESE COMPONENTS WILL BE VERY HOT.

The break away torque will be higher and should be disregarded. The rotational torque should be less then 20 Nm (15 ft. lbs.) of torque. **If rotational torque exceeds the specification (with calipers removed), the bearing/hub or differential should be repaired or replaced.** If the rotational torque is now less then the specification, replace caliper assembly. Refer to the 1997 Ram Truck Service Manual (Publication No. 81-370-7108), Groups 2, 3, and/or 5 for proper caliper, bearing/hub and/or differential service.

6.    Using a feeler gauge, measure the clearance between the caliper slide surface and the knuckle mounting arm (both top and bottom) (Figure 1). Take separate measurement at inner and outer portions of both top and bottom slides.

Back to 05-03-97 Index       Forward to Page 5

Visit Geno's Garage
for Truck accessories.		 Geno's Garage Truck Accessories