I just noticed this today after starting up my truck that the gear shifter just slides through the gears, not stopping and engaging like it should. I have a 2004 4x4 Lariat Supercrew.
Yesterday when driving I was doing 75 and moved it into 2nd gear, the rpm's immediately shot up ( I didn't notice how high) so I immediately moved it back to Drive. I drove my truck for a while after that, putting it in park, drive and reverse several times with no problems, but today it won't engage in any gear.

Heres a video. Maybe you guys know what the problem is.

http://www.youtube.com/watch?v=hUIL-O8J_VA

 

crawl under and the linkage is probably disconnected where it connects to the trans.

 

u need a sheifter actuator, its a dealer item only, cost 295 canadian i got it new on ebay for 120< take plactic try from around shifter off , and there u will see a white button u can press to disigage untill u get the part

 

Do your brake lights work? The shifter will not work if the brake lights dont.

 

Yes my brake lights work

 

My money is on the dis-connection answer from 'Need4racin'...this problem has nothing to do with the actuator or the brake lamp switch. If the linkage is not disconnected, then there is a Trans. problem.

 

UPDATE:
I FOUND MY PROBLEM!!!
I'm glad this didn't turn out to be more complicated and frustrating.

^
And you sir, are a genius. I owe you a beer.

http://www.youtube.com/watch?v=w4FeGHSV0JU

 

 

It's because you put the newer 4X4 stickers on her hehe... Glad you got it figured out man.

 

Here she is getting towed off to the dealer.