Constant Dripping From Shower Valve

I have a Symmons Temptrol Single Handle shower valve. It drips constantly after it's turned off - unless I torque that sucker over HARD when I turn it off. Sooner or later, I'm going to turn it so hard, something's going to snap.

I found a Symmons web site with an exploded diagram of the valve assembly but I have no idea which of million parts that are displayed I need to replace to stop the drip.

Any information would be much appreciated.

Thanks.

- Terry

Many years ago I lived in a "cookie cutter" house that had a Kohler Neidecker (sp?) single handle faucet. It also leaked.

Since I was pretty sure it was the original faucet I just went to the local full-service retail plumbing store (I probably could have tried the local True Value hardware store) and asked the old-timer at the parts counter. He knew the valve well, said it was a good unit and he told me exactly what few parts I needed.

You probably just need a TA-10 spindle, and the set of hot and cold seats. You do need to also purchase the special Symmons seat wrench.

Best bet is to take all your parts to supply store....probably want to do this on a weekday, to allow plenty of time for oops/