1999 s type gearbox failure

Hi. Guys,

Please can you help i have a 1999'v' s type 3.0 se auto .over 12 mths ago it experienced the dreaded gearbox fault as expected with the ford 5r55n gear box . I puchased another box that was told would fit but it turned out to be the 4.0 vrrsion using a. Very good local autobox shop. The internals were swapped and the box refitted with replacement parts where needed then fitted back on the car . It has run faultlessly for over 12mths even returning better fuel consumption than previously experienced . Then about a month ago i was driving the car at motorway speeds when it lost all drive not even limp home mode .i was advised the torque converter had gone and purchased another torque and box from a running driving car.after fitting the box i still have no drive but also no warning on the dash to report a fault .

I have since bought another manual s type but am lothed. To break the old girl as the bodywork and interior are in excellent condition

Has anyone ever heard of or had this problem

Please please please help

The fluid levels are fine and the j gate electrics all work fine , the cable also selects the gears. But no drive through the box to the wheels. ELECTRICAL. .....?....