The diverter on our Moen showertrol single handle faucet does not pop in and out as it should--I have tried to grease it but to no avail. Should the diverter be replaced and if so how? Thank you.

The diverter on our Moen showertrol single handle faucet does not pop in and out as it should--I have tried to grease it but to no avail. Should the diverter be replaced and if so how? thank you.
Do any of these look familiar? Regards, Tom

No-those images are not like my Moen shower faucet--it is a single pullout handle in the middle with a pencil thin push/pull diverter under the control knob--it is this diverter that does not move in and out properly--thank you.

it is a single pullout handle in the middle with a pencil thin push/pull diverter under the control knob--it is this diverter that does not move in and out properly--[/QUOTE] I think I've a replacement part for you, (see image) Check it out at:
MOEN Shower Diverter: Compare Prices, View Price History and Read Reviews at NexTag (http://www.nextag.com/MOEN-Shower-Diverter-69338227/prices-html?nxtg=44b30a1c052f-9B3CDF5640E6B02A)
Good luck, Tom

Have you tried to contact Moen to cash in on their warranty? Warranty Information for Moen Faucets (http://www.moen.com/consumersupport/warranty.cfm?location=TopNavCustomerSupport)