Hardy Posted March 6, 2011 Share Posted March 6, 2011 Hello,I have a mack 12 speed trans model TRTXL1070B,what do these numbers mean?and where can i get a service manual for it? Quote Link to comment https://www.bigmacktrucks.com/topic/18239-mack-trans-numbers/ Share on other sites More sharing options...
Superdog Posted March 6, 2011 Share Posted March 6, 2011 Hello,I have a mack 12 speed trans model TRTXL1070B,what do these numbers mean?and where can i get a service manual for it?TR - TransmissionT - Triplex(a 12 speed is considered a triplex transmission because of the 3 splits available,lo-lo,direct & hiX - Heavy dutyL - lightweight(aluminum case)107 - series number for the Maxitorque 5 speed main box0 - OverdriveB - 2nd series of this transmission,lo-lo is air shifted instead of a second stick.Watch Ebay,the big green Mack Highway service manuals covers several different transmissions,plus alot of other good info,if not,any dealer should be able to get you one. Quote Link to comment https://www.bigmacktrucks.com/topic/18239-mack-trans-numbers/#findComment-74074 Share on other sites More sharing options...
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