Transmission won't engage

On my 2002 Town and Country with 71000 miles.

Driving on the highway the torque converter disengaged never to fully engage
again.
When stopped, if I put it back in gear it would go a few feet and then
disengage completely.

I'm seeing codes like P0700,P0601, P1698
All relating to transmission control failure and TCC/PTU solenoid.

I'm basically debating if I should pursue checking electrical connections
and TCC solenoid replacement or if history has shown this to be that the
torque converter is shot.
The fluid is clean does not smell and is up to level. Prior to the problem I
noticed some hard down shifting and late lockup.

Any insight would be appreciated.

TIA,
Chris

 

The only sentence in this that I can completely understand is this:

 

The only sentence in this I can fully understand is this:

"When stopped, if I put it back in gear it would go a few feet and then
disengage completely."

To me this means after a few feet the car won't move. If that's the case,
then it's nothing you can fix. The solenoid only comes into play when
you're going 50 miles per hour. All the electronic controls can fail, and
it'll still move, quite well in fact.

It may well be the torque converter got chewed up inside. If that's the
case then the tranny will come out, and you'll have to make a decision about
rebuilding it while it's out.