97 ram 1500 wony go in overdrive

Comuter keeps pulling up the govenor
pressure selonid i replaced all that stuff and
it still comes up that and wont go into
overdrive at all i put a new transmission in it
and comes up the same thing i replaced the
relay fuse on it to and nothing changes wont
go into overdrive at all and keeps poping up
the govenor pressure sensor what can i do
to fix this problem???? Someone plz help. Its
a 5.9l 360 and automatic transmission