Can anybody please help me or at least point me in the right direction? 2005 Grand Cherokee, 5.7 Hemi, 65k for miles. On my way into work the other day my jeep decided to shift itself into 3rd gear by itself and now it says 3rd on the dash and I can't get it to shift up or down even with the auto stick. The first couple of times that i unhooked the battery it would reset the check engine light and all was good but now it won't even do that. I've heard a few people talking about a tranmission shift sensor.....has anyone else experienced anything like this?????