wont shift gears when running or sit still

[jim_n_naples]

2007 outlander 500

Started last night out of the blue,  about 300 miles 35-40 hours.

Can not shift F or R or L to H.  Runs fine except it will not sit still either...it just keeps creeping forward or reverse.  Shifts fine with engine off and starts in the gear selected....any ideas?

[predatorracer8]

adjust your idler to lower rapm's maybe that will fix the sitting still problem

[lugnuts]

idle is to high lower your idle

[Slick89]

I agree sounds like the idle is way to high