My 1990 204k miles 745T kickdown cable a few years ago was more and more frequently sticking after passing and other accelerating maneuvers. Mechanic at the time - good mechanic and a very good guy, went ahead and got me the (expensive) replacement kickdown cable while I was trying to free up the cable with Blaster. Method I was using: freed up the cable at the the bobbin daily with the car in the driveway, stood the straightened cable up and shot and dribbled the solvent down the cable to get the liquid drawn by osmosis down into the cable housing.

Mechanic warned of diluting or otherwise damaging the ATF and suggested that any - unlikely- improvement in the sticking kickdown cable would be temporary.

Cable freed up reliably after a week or so of this treatment. That cable is still on the car now tens of thousands of miles and several years later. Of course, I changed and maybe even flushed the transmission fluid pretty soon after that, I do not remember the details now. Transmission is working fine, too, at 204,000 mi. Low, easy shifts. Car tows a boat, carries sacks of concrete etc. occasionally.