Hi, I have Wira 1.5A. My rpm when shift from N to D will get really low to almost reaching the bare min line. Vibrating is there but not to the extent of dancing. Worse til when I reverse. Will install both your product make it even lower?

I'm located in Cheras, Bandar Sri Permaisuri area, where is the best place to COD + installation? I planned to do it in this coming weekend.