you are totally right,
the car is 1996, 960,
for your info the transmission box is being replaced with another new, but the problem still was there,
so this mean it is somthing out of the gear box.
imthinking of the sensors or the governor but i want to make sure,
your advice and info is appriciated.
Has the Park neutral position sensor (pnp switch) been replaced yet?It is located on the side of the transmission.When that does bad it sets code and makes the car start from a stop in 3rd gear.That might be the problem.Was there any discription with the code when they pulled it?Was it pulled from the engine or the transmission?