Q: Transmission won't downshift on 1993 Toyota Camry

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
My Camry with 379,000 miles started go into third gear rather roughly, then the car started to not downshift to first gear when coming to a complete stop. All the gears work without any delay. When driving the car in D with PWR mode on (revs hit 4,000 RPM), the shifts are smooth, but when driving slow, all gears will go in (4th will go in at <15 MPH...really annoying). I have no idea what could be the problem. Oh, and the tranny also started to leak between the trans and the engine. I don't want to spend $1,500 on a trans rebuild on a car with close to 400,000, but it is a solid car, I don't want to get rid of it. Any ideas?
(2) Answers
When is the last time it's had a simple filter and fluid change (not flush)? That may help with the symptoms a little. You also state that it's not downshifting on it's own. Will it downshift manually?
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