Tranny fluid in the kickdown cable did the trick.
Thank you, Gary H.

The challenge was to get the fluid to go down into the cable.
Basically, a rubber hose, funnel and a small clamp did the trick.

Unhook the top end of cable at the pulley.
Remove what's left of the rubber seal-cap at the end of the cable housing.
Slip about 8" of 5/16" I.D. (8 mm.) tranny-fluid-rated hose over the cable.

Hose has a larger diameter than the fitting at the end of the cable housing - and so will accomodate the lug at the end of the cable itself, to be inside the hose.

Point open end of hose upwards at pulley. Hose-clamp lower end of hose to the threaded end of cable housing - small clamp. No clamp = fluid dribbling freely.

Stick small funnel into top end of hose.
Pour in tranny fluid. Not too much, because not much goes into the cable.
Let it soak in while you do other stuff.
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Sven: '89 245, IPD sways, electric rad. fan conversion, e-codes, 28+ mpg - auto tranny. 850 mi/week commute. '89 245 #2 (wifemobile). '90 244 (spare, runs).