2000 tranny codes wondering the solution
 

hey everyone im kinda new to this forum thing so bear with me. I dont have a manual so it kind of sucks as we have two xc70s. The problem is this our 2000 is having some difficulties shifting and it feels like it loses power when you drive it. heres the codes its throwing P0751 shif solenoid ackt performance or stuck off, P0756 shift solenoid bckt performance or stuck off, P0733 gear 3 ratio incorrect, P0734 gear 4 ratio incorrect, P1618 manufacutre control aux inputs aux outputs. now my questions are what can i do to fix these? another question i have is the older one we have has a new shift solenoid i believe as long as it is located by the tranny fluid dipstick area. am i right about the location? and if i am right about the location if we replace that part would it help with the solenoid problems and gear ratio problems? any help would be greatly appreciated thanks

could be the abs system I had 2000 that threw tranny codes and flashing arrow as well as abs light on. replaced(had repaired) abs and all good.