dirtfarmer163 Posted January 10, 2010 Share Posted January 10, 2010 Is it possable to remove the air shift parts off a 12 speed and install a second stick for the hi low rev. and if so what all is needed A friend of mine and i were talking about it and i figured i would ask the mack gods thanx matt Quote Link to comment https://www.bigmacktrucks.com/topic/12129-12-speed-conversion/ Share on other sites More sharing options...
Bullheaded Posted January 10, 2010 Share Posted January 10, 2010 There's got to be a way to do it. Just look on some of the "largecar" sites. All the show truck guys are doing it with 18 speeds, to make them look like two-sticks. Quote Link to comment https://www.bigmacktrucks.com/topic/12129-12-speed-conversion/#findComment-46956 Share on other sites More sharing options...
dirtfarmer163 Posted January 10, 2010 Author Share Posted January 10, 2010 There's got to be a way to do it. Just look on some of the "largecar" sites. All the show truck guys are doing it with 18 speeds, to make them look like two-sticks.see we don't want a look like 2 stick i have seen that bs before im talkin a true machanical linkage to the shift fork like the old 2 stick six speeds had thanks matt Quote Link to comment https://www.bigmacktrucks.com/topic/12129-12-speed-conversion/#findComment-46965 Share on other sites More sharing options...
dirtfarmer163 Posted January 11, 2010 Author Share Posted January 11, 2010 so can anyone tell me if it is possable to do Quote Link to comment https://www.bigmacktrucks.com/topic/12129-12-speed-conversion/#findComment-47012 Share on other sites More sharing options...
ThaddeusW Posted January 11, 2010 Share Posted January 11, 2010 so can anyone tell me if it is possable to doI heavily doubt it. The auxiliary section that is air shifted uses air cylinders that are internal. There is no external mechanical connection that is able to be shifted with a stick or linkage.Welcome to the forum. And I dont want to sound mean but proper punctuation makes posts easier to read. Quote -Thad What America needs is less bull and more Bulldog! Link to comment https://www.bigmacktrucks.com/topic/12129-12-speed-conversion/#findComment-47014 Share on other sites More sharing options...
Lmackattack Posted January 11, 2010 Share Posted January 11, 2010 I have yet to see a air shift 12 speed converted to a 2 stick. I dont think they were ever set up for manual linkage so it wont work. The older 6 speeds had the shift cover do all the work in the aux box so it could be manual or air depending on the cover you installed. I like 2 stick transmissions but I think the 12 speed with its clutch packs and short splits that work the aux box is beeter suited with air. let us know if you find more info on this... Quote Link to comment https://www.bigmacktrucks.com/topic/12129-12-speed-conversion/#findComment-47015 Share on other sites More sharing options...
theakerstwo Posted January 12, 2010 Share Posted January 12, 2010 That could not work. The clutch pac would not be useable for a manual shift anyway. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/12129-12-speed-conversion/#findComment-47079 Share on other sites More sharing options...
fjh Posted January 12, 2010 Share Posted January 12, 2010 so can anyone tell me if it is possable to doAnything is possible! How much money do you have? You would need to build a new shift lid arragment!To involved for the average guy Id think!The lid has a lock out arangment inside that locks out the forward gears ya don't want to break somthing! Quote Link to comment https://www.bigmacktrucks.com/topic/12129-12-speed-conversion/#findComment-47086 Share on other sites More sharing options...
Lmackattack Posted January 12, 2010 Share Posted January 12, 2010 Anything is possible! How much money do you have? You would need to build a new shift lid arragment!To involved for the average guy Id think!The lid has a lock out arangment inside that locks out the forward gears ya don't want to break somthing!Lets see.1st you have the hi lo range shifter that is used with the clutch packsthen you have the Low Low "dash switch" to use the lowest gear in the box.then you have the Reverse sshifter. all of these would have to be figured out in the shift pattern. Even if you removed the clutch packs you still have to find a way to get all the gears to slide around to enguage or not enguage. Money talks but its not really worth it to get 2 sticks from it as it works pretty darn good as it is. I always say its one of the best boxes Mack ever put behind a maxidyne. Quote Link to comment https://www.bigmacktrucks.com/topic/12129-12-speed-conversion/#findComment-47101 Share on other sites More sharing options...
Bullheaded Posted January 12, 2010 Share Posted January 12, 2010 Ya, that's why I thought, the only way to do it without spending a fortune would be to just put a stick controlling an air valve for your splitter like they do with the 18 speeds the show truck crowd is doing. Quote Link to comment https://www.bigmacktrucks.com/topic/12129-12-speed-conversion/#findComment-47128 Share on other sites More sharing options...
Lmackattack Posted January 12, 2010 Share Posted January 12, 2010 and at that rate just keep it stock as the 12 speed was one of the first Mack air shift boxes that worked well. One thing I have never heard was if the clutch packs were better on the 12speeds vs the 9 speeds Quote Link to comment https://www.bigmacktrucks.com/topic/12129-12-speed-conversion/#findComment-47129 Share on other sites More sharing options...
dirtfarmer163 Posted January 14, 2010 Author Share Posted January 14, 2010 well thanks fellow. what the deal is, i have a friend that has one and he was wandering about it,and he is not much of a mechanic. And i myself have never seen one on the ground to know how it looked and worked, so we asked and have scraped the idea thanks matt Quote Link to comment https://www.bigmacktrucks.com/topic/12129-12-speed-conversion/#findComment-47316 Share on other sites More sharing options...
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