Just saw it in Summit... They have 3.90 gears!!! Perfect!!!

 

If I would pay to get 3.90's installed, I would go ahead and go with 4.10's.

 

nice option though....off the line power, and definitely save you some gas compared to 410s .......good find! i imagine that they will be fine....on a chart i have seen, 3.90 is the more equal tow, vs cruise gears out there! not saying anything lower than that ie.3.73. or 3.42. or anything like that cant hack it...just i have seen 3.73 gears fail miserably at towing, and so when i got my truck i opted for 410s but they eat gas mileage, but definitely have great ofdf the line, towing performance!!