i found it easier to drive smooth and consistant with the heavyer diffs 10k all round it is absolutly dialed for polished floor and was quite good on astro i needed to get the rest of the car good but i think the diffs wer better 10k all round for astro to i found runnin 5k f and 2k r or 7k f and 2k r the car rotated to quik and giv more steering and u dont need steering with a durango