fredward Posted November 4, 2012 Share Posted November 4, 2012 Hello hope some one can help have a 690t single axle mack with 5 speed want to swap transmission for something better any suggestions on transmission 8 or 9 speed. And what about rear motor mounts Quote Link to comment Share on other sites More sharing options...
David Posted November 4, 2012 Share Posted November 4, 2012 We're going to need a little more info to be of any help. Which five speed do you have now? What rear ratio? What do you consider "better"? Quote Link to comment Share on other sites More sharing options...
j hancock Posted November 4, 2012 Share Posted November 4, 2012 Depending on type of use and gear ratio, a Mack 2090 might be a nice upgrade for you. Mounts on the trans. Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
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