Maddog13407 Posted February 8, 2012 Share Posted February 8, 2012 recently took the duplex out of my B613T and replaced it with a Trt722 triplex. this truck had a triplex originally anyways. the duplex i took out was said to be a 10 speed direct but i believe was a mixmatch of gears cause you could Rarely shift the auxillary without clash. i think someone put an overdrive backhalf from a 9 speed or 10 speed overdrive onto a 10 speed direct. anyways with 4.00 gears on 11 24.5's and a 711 it would do 70 against the governor. anyonbe have an idea what it will do now with the triplex or will it be the same? also are all 15 speed Triplex's overdrive and the 13 speeds are double over? Also what was the abreviation for a double overdrive? Trt7220? and the singles were Trt 720? and mine isnt overdrive? just wondering. thanks, Matt Quote Link to comment https://www.bigmacktrucks.com/topic/23146-triplex-transmission/ Share on other sites More sharing options...
other dog Posted February 9, 2012 Share Posted February 9, 2012 recently took the duplex out of my B613T and replaced it with a Trt722 triplex. this truck had a triplex originally anyways. the duplex i took out was said to be a 10 speed direct but i believe was a mixmatch of gears cause you could Rarely shift the auxillary without clash. i think someone put an overdrive backhalf from a 9 speed or 10 speed overdrive onto a 10 speed direct. anyways with 4.00 gears on 11 24.5's and a 711 it would do 70 against the governor. anyonbe have an idea what it will do now with the triplex or will it be the same? also are all 15 speed Triplex's overdrive and the 13 speeds are double over? Also what was the abreviation for a double overdrive? Trt7220? and the singles were Trt 720? and mine isnt overdrive? just wondering. thanks, Matthttp://www.oldmacksrus.com/trannys.htm Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/23146-triplex-transmission/#findComment-101513 Share on other sites More sharing options...
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