Moses, thanks for the prompt response. I have your book (great source of info) as well as FSM/Haynes/etc and feel I am well "informed" on the process ahead of me. However, book knowledge isn't the same as experience. I have tried the putty knife and mallet endlessly to no avail -- sealed tighter than Fort Knox. Can I tap directly on the retainer to attempt to loosen it without bending or damaging anything inside? This is a rebuild so all seals, bearings, etc will be replaced. Is there a reason my particular retainer doesn't have any slots? Aftermarket perhaps? (everything appears to operate freely inside.)