Can some one tell me if you can swap out my auto tranny 4l60 with a t56?

well tonight really sucked i was about to go for a swim and bang my tranny started to make some crazy noise sounded like blowing thu a peice of grass my tranny started to act up no reverse it would go in to second then skip third and go to od ?????? ok i know i drive my truck really hard so now i need a tranny i really kinda wanted to to break it anyways because i want a 5 or 6 speed can any one tell me if a t56 will fit in my truck or what i could put in it to make it go like snot i have 99 gmc sierra 2wd base model iv done a lot to it 4.56 rearend alburn posi its flash tuned with 3rd stage afi air intake and some other bolt ons some one please help :doofus:

There are some threads that have explained this. the search button works wonders.

considering this is your second thread asking the same question too

Ok, let's help the poor fellow than rag him. :D

Read this thread: http://www.ls1truck.com/forums/mecha...t-56-swap.html

I looked for that one, I even have that one printed out and in my notes, couldn't find the damned thing. But in that it's going from 5 to 6speed, a lot simpler.