1badtransam

code popped up po753 shift solenoid A..my car does have a stall usaully this code would be 1-2 gears ive read, but i fill a switching around 42-45mph like its confused to go between a lower or higher gear then it snaps out of it if i just give it a little more pedal. im kinda thinking my solenoid is going bad but wondering if i should just replace them all if this is the case
THANKS!!!