need some guidance
i picked up a 99 powerstroke the other day and it had a tranny problem. when i start it up theres like roaring sound towards the front of the transmission. and the truck wont even budge. i have the axle out of it and when its running in any gear i put it in the output shaft is still spinning. and i can stop it with my hand. even when i give it throttle... while the truck is running when i go to put it in park it grinds, but if i shut it off and put it in park and start it up it runs fine and i can shift it out of it.
any ideas what it could be. or ideas where to start looking into, i planned on pullin the trans anyways just need ideas of a starting point. or if you think the trans is completely toast? and my trans is auto so thats the 4r100 correct?