Tranny locks down while trying to shift into third.

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Whats up guys. Heres the deal. I picked up my '05 6.0 from the dealer after they installed a new turbo, oil cooler, egr cooler, and radiator. As i was driving home,(not even 10 miles) the tow haul light started flashing and everytime it would try to shift into 3rd it would literaly LOCK down like you slammed on the brakes. once you stopped it would go again until 3rd. I called the dealer immidiatly and took it back. That was 2 weeks ago and all they tell me is its spitting all kinds of tranny codes and they wont know anything unless they tear the tranny apart. Does this sound right? Ive never had any tranny problems and now my warrenty is expired. Just seems fishy it happened so soon after i picked it up. Any suggestions as to what could be wrong or what i need/should do? THANKS guys, Verlin
here is a list of codes the ford house just gave me..P0700, P0772, and P2704 hope that helps.

[symbols]

Sounds fishy to me as well. Did it ever go into 3rd after you picked it up? I don't know enough about them to help you but here is a

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yes it drove and shifted fine for the first 5 miles or so.

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Sorry if this is the wrong section, but i really need my truck its my only vehicle.

[greasltn]

You're in the right section, just everybody's stumped. I've never heard of this happening, and if they won't tell you the codes, I don't know where to start.

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Originally Posted by greasltn

You're in the right section, just everybody's stumped. I've never heard of this happening, and if they won't tell you the codes, I don't know where to start.

well i called the ford house and got the codes....they are--P0700, P0772, and P2704 if that helps.