Replaced DW drain sump housing which was ripped. Also replaced most plastic fittings and rubber valve inserts. 20-year-old DW.
The issue with replacing the pump connector - I had to shim the Spray Arm Water Supply Tube with a homemade gasket so it would tighten. I suggest marking the position of the old pump connector so the threads start in the same place.
DW works great - no leaks and seems to function better.
AppliancePartsPros.com repair videos were very helpful. I needed several orders as I first thought it was the tub gasket leaking, then discovered a ripped sump, and finally noticed a frayed door spring cable.