307k miles on original transmission. I think it was run a little low on fluid for a while, I topped it off and although better, it still has a soft 1-2 shift and a flaring 2-3 shift. I turned the vac. modulator all the way up.. not much help. I don't think it's an internal trans problem.. maybe K1 or B2 piston issues? I think this is a 722.4 trans. Thanks!