hey i was driving the 04 dually with the 48 re trans today felt a little shudder in the trans at 25 to 30 mph when i went to pull out onto the road it moved for 5 or 10 feet under its own power then reved free and coasted backwards. i turned the truck off waited a little restarted and put in gear it moved 5 or 10 feet and did the same thing. the trans fluid is full and no leaks and isnt burnt no codes or check lamps. no noises at all sound normal didnt make any noise when it stoped working either. help let me know what yha all think

 

Is it a 4wd? If so, make sure the 4wd shifter wasn't bumped into neutral.

 

its in gear the trans was slipping for awhile now

 

You might try flushing the trans. I have a Duramax with the allison trans. Did the same thing. Also try putting it in drive with the brake on and accelerate. That will push fluid through the lines with some pressure.
My truck would do that in the middle of town at a stop light. I would try to go and it would just kick out of gear like it was in neutral. I then would have to turn off the engine, wait a few seconds and reboot. Ya know I pissed off some people with my truck over that. Oh well, that's why I like my truck

 

it has 1 month old fluid and i can hold it to the floor and it still doesnt move after that first 5 or so feet

 

Does your trany have an external filter and an internal filter? My Allison has 2 filters. The only other thing I can think of is maybe you're having some computer probs. But you said there's no dash warning codes Man I don't know, you'll have to let me know how that one comes out. My panel said (TRANSMISSION DISENGAGED)

NO ****!!!!
That was some good info. The dealership didn't even know what that one was.

 

took my trans out all the bands were melted away and the pan was full of metal time for a stick swap

 

Sounds like its time for a new Suncoast 48re.

 

suncoast didnt like me so i think im going a different direction

 

goerend
or a 6 speed swap!