Chrsyler Auto Trans Problem

I have a 1995 lebaron convertible, auto, 3.0., with a 604 trans. It
shifts fine when cold, but after 15 minutes, it locks into second at
slower speeds.I think it's going into the "safe mode". If I get it up
to about 40mph, I can put it into nuetral, shut it off, restart and
then put into drive, Then it's alright, as long as I maintain 40mph
plus. When I drop down below 40, like at at stoplight, it locks into
2nd again. I have changed the imput speed sensor, and the
fluid/filter, all to no avail. The speedo works good, so I assume the
output speed sensor must be alright. Does anybody know what I should
do? Please post or e mail me at . Thanks, Mark

 

Yeah. Maybe you should post this 3 or 4 more times.

 

It's real simple. If you go to a transmission shop with the appropriate scan
tool, they will tell you what the tranmission doesn't like. The computer is
shutting it down because something is not working properly. Since it remains
happy above 40 mph, I think you will eventually learn that one of the gears
other than overdrive is too slow to engage.

Odds are that nothing that you can replace external to the transmission will
cure this.

 

Could be low fluid pressure from the trans pump, when he's above 40Mph the
rpm
is high enough for the pump to develop adequate pressure.

Ted