The C-clip installation is difficult, but even so, it’s relatively easy. Remove the cross pin from the Lock-Right to allow the two center drivers to come together. With the axleshaft pushed all the way inboard, drop the C-clip in between the clutch and driver and, hopefully, into the groove on the end of the axle. Once engaged, pull out the axle to seat the C-clip in the recess of the Lock-Right. Check for a small amount of endplay and free rotation.