so iv just been and cleaned the solenoid and gauze and I'm afraid there is no change, as i draw the selector back to R after a few moments and a clunk i get reverse then i select N and it goes in, back to D4 a delay with a judder and a jolt and i get second and once its in no R or any other gear

iv cleaned of the two solenoids on the top of the box but the is what appears to be another two metal 'caps' each secured with one bolt each, are these solenoids too??