I'm pretty sure of the reason for this. But I figured I'd run it by some fellows with a bit more knowledge of how this works then what I know. So I have a 1999 Dodge Cummins 2500 auto trans 4wd. The other day I was driving sled and went into a ditch. The bumper was already pretty close to the trains cooler from the truck running into some trees a while back. So it didn't take much to push it into the trans cooler, so it poked a good size hole into it.I mean it looks like A SuperSoaker is blowing trans fluid out.
Well I was only maybe 2 miles from home and was able to drive it home around the last quarter mile I could feel trans lightly slip . Tonite I fire her up to pull down into the shop to work on and you could feel it move when you put it into gear that little shake vibration type deal.
But that was all that I got couldn't get it to move if I let it sit for a second and guns and threw it into drive real fast one time I was able to get it to move . It's still spraying out tons of fluid. And if I check the fluid it reads full, but I know that is incorrect because I haven't let it get up to operating temps . I'm thinking the whole is the issue I don't see the trans going out that fast . I'm thinkin it has to do with loss of pressure & kr nkt enough fluids get into the torque converter.
And PLEASE forgive my poor grammar, punctuation and such I really suck at this.

 

You might want to pick up a new trans cooler and top off fluids. If it was puking fluid like you were saying you run the risk of damaging the transmission.