1989 Crown Victoria Transmission Question

Is the fluid at the correct level and what condition is it in?

Usually right where you checked it.

Be sure you checked it correctly. It should be warmed up and idling in Park.

Another thing you might check is the linkage from the throttle body down to the transmission. Ford used a plastic pop-in bushing and now is about the time it might fail. The linkage usually falls off the throttle lever causing odd shifting. There are actually two of them, one on each end of the kickdown linkage. It used to be a dealer part but I heard a rumor that some parts places carry them now. If you have a broken bushing and fix it quickly enough, minimal damage usually occurs.

If the linkage is OK, check the fluid again. It should be red and smell oily. If it smells burnt or is dark as if it is dirty, change it. You add fluid right down the dipstick tube. I bought a long and skinny funnel for it.

I hope this is helpful.

PoD

There's a strong likelihood that the Throttle Valve cable is loose, broken or misadjusted. The internal transmission pressure is determined by a Throttle Valve (TV) cable that connects to the throttle on the intake. The cable position is sensitive, and technically is supposed to be set by a technician with a pressure gauge.

CJB

I have a 90 grand marquis and had the TV cable problem. I was told that that cable supplies the hydraulics to the tranny and if not correct you will burn the tranny out. I caught my problem in time and saved the tranny.

it may also just be low on fluid.