Originally Posted by Zulfiqar

To remove the manual valve lever you need to drop the sump and undo it from the valve body, its not very complex.

If you say the previous owner used the 4321 - quadrant a lot and it caused the lever seal to wear out then that is incorrect.

the manual valve only has 4 detents which are PRND - when the shifter moves to 4321 (below D) the manual valve does not move, the 4321 are small electric switches in the shifter assembly which relay information to the transmission computer that the driver is demanding manual shift control.