Scott for Model Number LAT2301AAE Their is no lip on the shaft, just a shined up area where the collar rides on the shaft.
Answer Hello Scott. There is a lip just above the o-ring on the shaft. You can see it in the 2nd picture on the shaft parts page. If your lip is gone, you will need to replace the shaft. Hope this helps. Read More... Answered by AppliancePartsPros.com | Thursday, April 21, 2011