jonathan haines Posted November 5, 2021 Share Posted November 5, 2021 how much power can a 12 speed single stick realistically handle? I've heard stories of them put behind 3406's and even one behind a hot tune kta cummins (making an alleged 600+hp). so it got me thinking what are the power numbers these boxes will take before catastrophic failure occurs? Quote Link to comment https://www.bigmacktrucks.com/topic/68666-mack-12-speed/ Share on other sites More sharing options...
mrsmackpaul Posted November 5, 2021 Share Posted November 5, 2021 More than you will ever through at it, over 2000 ft pound of torque comes to mind for some reason Dunno what but I feel its around 2200 ft pounds Paul Quote Link to comment https://www.bigmacktrucks.com/topic/68666-mack-12-speed/#findComment-482464 Share on other sites More sharing options...
Freightrain Posted November 5, 2021 Share Posted November 5, 2021 Lots of pullers run them behind hot V8 macks. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/68666-mack-12-speed/#findComment-482473 Share on other sites More sharing options...
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