I don't have a 6 spd, I have a 5 spd, but I ran my 33's with 4:10s for years, pulled my trailer with em, drove from SoCal to FL and made multiple trips from FL to Tellico and Windrock...etc No regrets, I think it was the perfect combo. I only changed to 4:56 when I went up to 35's. Again all IMO