engine code p0891

[jestersht]

hi I have a 02 ram 1500 4.7l and this code came up today p0891
I replaced tcm and ran fine took it out for a few min to test if it would move and worked fine, came home shut it off and now it dosent wanna move anymore again, switch back to old tcm and same thing was good for few min then don't wanna go forward lots of power in reverse but nothing forward, checked relays, fluid and I cant figure it out

anyone got any ideas