96 is electronically controlled, no TV cable. You have a sticking valve or shift solenoid. Might want to drop the pan to change the filter and inspect for debris. If there's excessive debris, that's bad. If it's relatively clean, replace the filter and fill up with fluid. Then add 1/2 a can of Seafoam TransTune. Drive for a couple hundred miles. Drain and refill the fluid again. Drive for another couple hundred miles and drain and fill again. Should be fine after that.

Fasteddy's advice is occasionally sound...