The 4:11 comes with the aisin transmission. That also gets you the high output 6.7. I'll tell you it's a chunk of change. If you order it I believe you will need the 14000 . I'll say I have it all in my truck, and it's a dream. I set the cruise and let the truck do the work.
I love it when people have 4 wheel drive. They can easily get up to highway speed with little consideration; how long will it take them to to get to zero .
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