I did a lot research, if I swap the Front Carrier, Front Ring Gear, Sun Gear from A999 to 904 I will have lower Gear Ratio on both 1st and 2nd Gear, the ratio will be 2.74/1.54/1 (904 stock ratio: 2.45/1.45/1)
I dont want lower on both 1st and 2nd Shift, I want lower ratio at 1st Gear only...