1987 300e transmission shifting

[Mazinger4]

Hi, I have a 300e that I acquired 6mos ago. Ever since I got it the tranny shifts hard from first to second gear, if you accelerate smoothly it will shift without feeling it, but if you accelerate hard, it will rpm to 4k before shifting, also if you accel and let go of the gas, then press it again it will shift normally during hard accel. This problem has always been there and all other gears shift wihout noticing. Also when decelarating you cannot feel any shifting.
Just recentely I replaced the Fuel Pump Relay, since the car was dying @ times, it got worse to the point whre it would not start. I checked for power to the fuel pump and there was none, so I replaced the relay and the car was cured. The shifting got better after I installed the relay, but not much better. Ive changed the tranny oil and found the old fluid to be clean with no metal shavings. Ive checked the trans actuator vaccum line to the intake manifold and found no leaks. The car runs smooth and the problems is not getting worse, but I am concern.