I've seen that some lifts say auto only or manual requires a transmission indexing ring but that is doesn't fit NV5600. If there is a vibration after a 6" lift why there is no one to make a indexing ring? Or is the NV5600 something different vs the G56 that makes it not need the indexing ring? I am lost here I want a 6" lift but I don't want any vibration. Anyone with a 6" lift with a NV5600 care to weight in?

 

I have the nv5600 and use the Skyjacker indexing ring. No problems.. I did however have to notch the tranny crossmember to clear front driveshaft at full extension.