1989 Mercury cougar
Reply #3 –
You're not finding the modulator, because there simply isn't one on these cars/transmissions.
You say you towed the car....and you DIDN"T disconnect the driveshaft!?
I'd say the OD band is toast...bummer dude
Might also check the linkage, and the TV rod/cable.
On my '88, the little rod popped off 2 different times, causing late shifts, and no OD gear on the highway (unless I was going at least 80)
That TV rod will cause the same symptom as a modulator, cause they do the same thing: controls shifts. Hope this helps ya out..let us know.