See if there's any damage on the piston teflon seals of your 2500 or 3500 and when you determine there's damage, use a pick to replace them by removing the o-ring layers and inserting new ones. After that, place the valve into the valve housing and add the retainer ring, securing it to 97 Nm (72 ft. lbs.). Don't forget that you will need to account for the extra length of your torque wrench. Fasten and tighten the retainer ring set screw to 2.26 Nm (20 in. lbs.), after which clean the steering gear housing with the valve assembly at the center. Set the valve assembly onto the steering gear and screw in the new bolts until the torque is 54 Nm (40 ft. lbs.). Put the input shaft seal protector 8986 in place, add high temp grease to the new seal and use the oil seal installer tool 8987 driver and C-4171 handle to push the seal into the housing until it stops just short of the snap ring groove. Place the snap ring in the hole of the housing and then tightly push it into place using the C-4171 handle with the driver 8987. While you are doing that, add enough high temperature grease from the seal kit between the pitman shaft bearing and the two oil seals. Fit the dust seal with high temp grease, apply it with tool C-4171 and use driver 8987. Before you put in the pitman shaft, be sure the gear is centered in the middle tooth. Fit the pitman shaft into the steering gear, process the over-center mesh load, assemble the steering gear onto the car and finish with a wheel alignment.