Jimbo was right again

As Ridepate said. If you have those plastic frame plugs on the rear frame of your Rhino, take them out. I had my Rhino jacked up in the front and removed the rear skid plate. About a quart of water drained out of the frame thru the rear skid bolt hole. That frame needs to drain back there. Water does get in.

Duh :D

i usually run water up there to wash out mud and what not

Frame Plugs have now been removed.....

and yes i do wash the frame out..... :D

Could you Guy's post pictures of these plugs ?

RD,
They are a commonly sold item on E-Bay. They close- off the square-tubing at the rear-bottom of the frame, in the back (on each side of the hitch) .They do claen the look up, but trap water in the frame big-time-see rust in pics!!!!!!!!!!!!!!!!!!
Here's a set I forgot to throw-away,note rust.........

I pulled mine off soon as you mentioned it.
and wash my frame out every ride.....