can someone please help i’ve had this problem now with 2 transmissions and one of them lost first gear and im scared im going to ruin this one i have in. i have a p0700 code and i think also a code for a lockup solenoid/shift solenoid. this is even after replacing the transmission with virtually all new sensors. this trans was good when it was in a different car but now in my car its acting how my first trans acted slipping gears if revved a little too much, its annoying when trying to get up to highway speeds. i searched forums and seems everyone else’s problem is slightly different than mine. can anyone point me in the right direction to look to fix this problem thank you so much