transmissions troubles...

i have an 02 gt, and my tranny just went out. ford had done a repair on it a while ago, and ever since it has been wierd. anyways, it locked up on me, there is no forward movement, and if it is in neutral and i let the clutch out, it goes backwards. ford says they dont kno if they can warrenty it, and i may have to pay them $800(just for the labor to see if it is covered by the warrenty) to get my car back. i have been looking for transmissions, and i found a t45, new guts, and new everything, just the same case and bellhousing, and i was curious to know if that will fit in my car. if i am correct, the t45 is a 6 speed, and a t56 is out of my price range. if needed i will resort to the stock tr3550, but a 6 speed would be nice. thanks guys.

yes, thats what i meant, tr3650, my mistake. hmmm...guess i cant trust some sources on the internet about transmissions. i was informed a t45 was a 6 speed, oh well. will a t56 bolt up to my car? if i have it in neutral, then i let the clutch out (the car is runing) it is as if i am in reverse. the only way the car will move forward is if the clutch is in. no gear can be powered to move forward. the clutch was fully out, and i was gassing it, and the car went nowhere in any gear. all i smelled was burnt clutch...the dealership says they found bearing material everywhere...not a good sign. at this point i think buying a new tranny will be cheaper than having ford fix it. thanks