"John Wiltfong Jr" <johnwiltfongjr@cox.net> wrote

> I am going to have it rebuilt in a few months after I save
> up some money (costs around $1800).

The term "slight delay " is useful but it depends on what speed and
gear change to determine if it sounds like an electronic problem.
If the TCU gets hot enough it may let go of the solenoid and drop
it out of gear.

First you might check to see if the previous owner had yanked the
TCU's cord...doing this prevents you from seeing the blinking
transmission D4 or S4 light. These transmission are known for
electrical malfunctions which a few people have thrown money into
the wrong part.

How to know if the cord is yanked. Unplug one of the
solenoid connector on the transmission and drive around until the
light shows up. You don't have to peel back a little flap of carpet
under the passenger's left foot to see the diagnostic light.

or...

You can wait a while and see if the new fluid will un-foul the
shift solenoid or other parts and may possibly rule out the computer.