Patrick of M
2005 T1N 2500 (NA spec)
I like the follow-up but I'm still confused. Is the OP still not able to communicate with the transmission. That doesn't make sense because the van needs to communicate with transmission to use it. So I'm guessing all communication is functioning? Also will the van go into limp mode with low fluid, and then cancel the limp mode itself when the fluid is increased? Seems remarkably helpful of the transmission that otherwise can be quite unhelpful.