Transmission Problem

I own a 1994 Ford Taurus 3.0GL V6 (Do you need the VIN/ Serial Number?) And will attempt at describing what hear wrong with the transmission. As of A MONTH AGO: When on a certain up-hill road at a stopped position, after applying pressure on the gas, a grinding/slippage sound would occur (I only gained a little speed) and I was forced to completely release pressure on the pedal. Then I had to slowly and carefully experiment with the gas in order to gain speed so the slipping wouldn't occur again. NOW: This problem doesn't occur due to the car not even moving forward or backwards:). Specifically, however, I AM able to get the car in gear - only when on the gas efficient drive. I experimented with the lower drives and the car wouldn't role into gear - when applying a certain (but steady) amount of pressure on the gas pedal. After say, five seconds, the car would smoothly get into a gear (2nd gear maybe?). It felt as if I was driving a stick shift (as when slowly letting off the clutch). But I cannot reverse the car whatsoever.

Have you ever heard or had experience of this specific problem occurring in this vehicle?

Through research, I have found some possible issues: Transmission/ Tranny filter gone bad; Transmission range/MLP sensor gone bad; Disconnected speed sensor; Low line pressure; Pressure relief valve stuck open; Bad pump/Linkage problems; Torque converter splines spit; Faulty shift solenoid; Clutch bands out of adjustment/ worn; Debris in valve body; Transmission fluid burnt; Blockages in the valve body or in the various fluid passages in the transmission.

NOTE: Of course you are not here to inspect my car, but that's why I asked if you ever heard or had experience of this specific problem occurring in the 1994 Ford Taurus. Also, is there a way to utilize the. I am not sure on wordage. Problems codes/indications?