Same situation with Symmons shower/tub diverter as read previously here, except that when I move diverter lever it seems as if the valve isn't opening all the way and I get some water out of shower head, but not full force. If I keep moving lever back and forth from tub to shower, tub to shower, etc, I will sometimes get full flow to shower head, sometimes takes 2 or 3 "back and forths" but lately taking many more and sometimes won't ever get full flow. So I took off the outer portion and inserted screwdriver into diverter hole to engage and get same results, does that mean its something other than the diverter spindle/valve? Do I need to replace the whole thing?