doubleclutchinweasel Posted August 13, 2014 Share Posted August 13, 2014 TRQ-7220 Quadruplex Shift Sequence Based on the gearbox ratios I got off another Wiki article, here are all the effective ratios for a TRQ-7220 Quadruplex. You can see where the ratios overlap, and would be skipped. You can also see why some of the LO-LO ratios would not be useful in a progressive sequence. Those could have been used, however, for "road speed control" for specific applications. I have done this with lots of the other old transmissions as well, if anybody is interested. Author doubleclutchinweasel Category Antique & Classic Mack Info Submitted 08/13/2014 11:59 AM 1 "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/36680-trq-7220-quadruplex-shift-sequence/ Share on other sites More sharing options...
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