AT transmission woes

I thought I would with this forum to see if anyone had ideas on what is malfunctioning in my transmission.
- Reverse is barely functioning (kind of like when there is not enough ATF)
-Car will shift up into 3 on its own at low speeds. Ususally it will downshift when throttle is added but then it will hold second and never shift into 3rd. It will spike up like it is shifting into 3rd but it bounces right back into second.
-If for some reason I can get it to stay in 3rd and get up to speeds around 45 I cannot get it to kickdown into 2nd by applying throttle. It will go if I manually select D2 but not in D.
-No overdrive.
-No TCU codes.

What have I done in attempt to fix this problem?
I have swapped TCU's, Pulse Generators, Shift Solenoids, valve bodies, tranny fluid/filter, adjusted TPS, and replaced end clutch.

Any ideas? I really would rather spend my money on Christmas for the family instead of throwing it at Mitsubishi to diagnos. Anyone ever have a OD switch go out? Mine hasn't lit up for about a year but OD has always worked. I read that the OD switch could effect shifting. Does the the Kickdown Servo effect upshift and downshifts?

Thanks,
Andy
95 GSX AT