IntaCooler

ok, for the past month now ive been dealing with this code 70 - automatic transaxel problem, i couldnt figure out what the problem was so i came to the point where i bought a newer transmision to replace my current Lx Auto tranny, so last night i finish installing the "new" 99 EX auto tranny and took it for a test drive the same night, i test drove it under normal conditions to make sure everything was ok. Everything seemed fine, it felt like it was shifting gears better then before and my dash was clear of any codes...BUT

This morning when i took it onto the highway on my way to school, the moment im crusing at 100km/h on comes the CEL again, when i stopped the ar i checked and there it was CODE 70 ONCE AGAIN

I was wondering is anyonw has had this problem and figured out a solution, oh when i shanged the transmission i was told by 2 honda mechanics to keep my original torque converter and not to change it, but i dont know if thats the cause for all this

PLz i can take swaping out transmisions over and over, i dont have the time or funds, SOMEBODY HELP