New used transmission problems
 

Hey guys I need some advice I brought a used transmission from Japan for my 02 2.3L accord and it seems to have trouble in staying in gear it has the codes p0700 p0730 but the old transmission it had p0740 p0780 an it had trouble getting outta 1st but when it does it goes in too limp mode but still drivable but now I can't really drive it because it did down shift hard at 50 mph but all solenoids are some what new few months old using them on the newer transmission just put in any help is welcome