diggerpro Posted January 28, 2019 Share Posted January 28, 2019 I have a Unishift transmission in my B61 that has a split aux case. I have a Duplex to install in the truck and was wondering if anyone has done this before. Im curious if the mounts and bell housing flange are the same and if I can use the air assist clutch that comes with the unishift trans with the duplex. I also have a doner parts truck with a triplex in it . Any comments ??? Quote Link to comment https://www.bigmacktrucks.com/topic/55431-unishift-trans-swap-out/ Share on other sites More sharing options...
Freightrain Posted January 28, 2019 Share Posted January 28, 2019 Just guessing, but I would think you could put any transmission back in. The Unishift was basically just an air shifted Duplex. I've never seen an air clutch set up on a B, so can't comment on that. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/55431-unishift-trans-swap-out/#findComment-414318 Share on other sites More sharing options...
Maddog13407 Posted January 29, 2019 Share Posted January 29, 2019 depends on which Monoshift and duplex you have??? if you are takin a 67 series out and putting one in youll be fine with mounts. same with a 72 series. I think the floor was cut for a monoshift same as a duplex with the tear drop hole. if you install the triplex there is a lot more work. Quote Link to comment https://www.bigmacktrucks.com/topic/55431-unishift-trans-swap-out/#findComment-414340 Share on other sites More sharing options...
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