Thanks for that. I have put the new(secondhand motor) back onto my linkage and it is working fine on the 3 speeds, but I can't get it too park corectly. The serial no.on my new motor is differnt to the serial no on my old motor, but the serial no. on the covers of the printed circuit boards are the same. As you have probably guessed i didn't mark the position of the linkage when i took it off., any tips on where the park position should be, as I have spent a lot of time trying to get it just right, but no success. Or is it critical that that the motors serial nos. have to be the same.