Transmission issue Options

[celica95gt]

HI
I am new to the site and work at Toyota and working on my 95 celica and have some trouble with the transmission. With my oringal automatic Transmission it was work fine but one day it just would not go into gear at all I would accerlate and the car would not move just the rpm. If I turn the car off and then on again it would be fine for one or two miles then do the same thing. After doing that for about 15 miles the transmission would not go in drive only ine reverse.

So I get a used transmissions inport from japan from a company here in the us 40k miles 6 month unlimtied mile warranty Install the transmission everything was fine for one day.then the same problem happen again like I said above. So I remove the soliend wires so I can run it like a maunal runs ok but if I go higher then 60 miles per hour the rpm are going almost to four thousand. Also will not go in reverse so I know I need to put another transmission in the celica. I which i got at work for the company who I bought the transmission from gave me another. I am wonder if anyone has had this problem or have any idea on why it would do this just bad luck same problem with two transmissions. Could it be something different.