Now that you have cleaned to your heart’s content you can start your reassembly. You will first slide the CV boot onto the shaft. Sliding the inner and outer race on to the CV shaft and replace the c-clip. Now this is the best time to add your grease to the empty CV cup. Be careful to keep it off the the exterior of the cup or boot, make sure to clean it up if you do. Otherwise when you check your Cv boot down the road you may think you have a premature leak.