Can anyone give me the parts list or point me in the direction to find a parts list to convert an Allison 2000 to 4x4 with a park pawl, while retaining the low ratio (wide ratio) the 2000 offers if possible. I know I will need a 4x4 extension housing, output shaft, c5 piston. I just don't know what planetary parts I need in the P3 to keep the wide ratio, or even if it exists.