i picked up a set of Snap riung pliers from Napa. for me, the clip didnt look like it was seated, so i banged on the axle towards the hub from the back, then took a long flat head andbanged the snap ring till it fully seated. it seemed to just be "crooked" i guess not fully flat against the hub/axle shaft. it popped right in with a few taps of the mallet.