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Message: [QUOTE="Big Calo, post: 41712, member: 765"] Just my opinion on the matter and Ill toss this out there. My truck currently has 3.73s in it. I want to do a gear change as well but I want to go to ~3.30. Just a few things to keep in mind, I have a ZF6 and the way I do the gear pattern in L-1-2-3-4-OD. So I do have the advantge of a low gear for taking off but I can take off in 1st while grossing about 27k. My reasoning is that with 4.10s you have a towing beast but at highway speeds you have a fuel guzzler. With the 3.73s in my current truck 4th, I feel, is to low to pull at say 65, wound up to tight, where as OD is to high and it lugs to much. My dad went from 4.10s to 3.55s in his one ton and for me personally its still not in the rpm range that I want. So I found some gearing calculators and started playing around with different ratios and the 3.30 range would put me towing in 4th at about 2200 rpm but cruising in OD at about 1600 rpm. I havent fully researched it out but I will be trying this hopefully in the near future. [/QUOTE]

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