Ford Fusion transmission not shifting to overdrive

I can drive about 55 but no faster and it shows about 3600 rpms but won't shift into the next gear. The wrench symbol stays on, is it just a blown solonoid like in the Focuses? Every now and then it will rev higher than normal going from 1st to 2nd gear. Any suggestions?
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Could be a fuse, the o/d switch, a solenoid, or....well, let's not go there just yet.