Sorry Ed.  I can virtually assure you that if you changed the computer and
hydraulic pack and nothing changed, that it IS the tranny.  In fact I think
your lucky that you didn't make it worse.

How many miles on this van?

I have a 94 T&C myself and the transmissions in those vans started out
really terrible in 1990 and got progressibly better over the next decade -
as Chrysler learned from their mistakes and redesigned parts.  In fact the
A604 transmission in a 2001 minivan is almost a completely different
animal than in your van.  For one thing the mechanical linkage is gone.

You can try a COMPLETE fluid and filter change but I think your
tranny is just simply worn out.  But you are lucky that it is still working
since that means the gearsets and case are still good and a rebuild by
a competent rebuilder would put it to rights.

You can try having a Chrysler dealer scan it with a scan too and tell you
the clutch volume indexes - if they are out of range the transmission is
worn out and needs rebuilding.

Ted

Hi. Try the MAP sensor. Good luck and give à folowing please.
L.G.R.

Might be the PRNDL switch?