Mcrafty1 Posted December 8, 2015 Share Posted December 8, 2015 Don't know if this is the right place because this is a transmission/rearend question.....Can anyone tell me what the top end speed would be for a Mack with a 14 speed (I believe this trans. to be the TRT 722 or the TRTL 7220 ) with 4.17 rears( I think) and 1000x20inch rubber governed at 2100rpm....Thanks I should add that this is in a 1966 B53 of which I have never seen, the owner says it is a 14 speed trans. Maybe it is better known as a 15 speed IDK. Quote Link to comment Share on other sites More sharing options...
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