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:mack1: Ratios are as follows, 1st 14.44, 2nd 11.23, 3rd 8.59, 4th 6.68 5th 4.99, 6th 3.89, 7th 2.84, 8th 2.21, 9th 1.66, 10th 1.29, 11th 1.00 12th .78. And there are some 12 speeds that are just direct in 12th gear. Terry

Thank you. I have looked and looked but never been able to find that.

Thanks for the help!

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https://www.bigmacktrucks.com/topic/3605-mack-12-speed/#findComment-18177
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