JReding Posted August 13, 2014 Share Posted August 13, 2014 I'm new to this forum, and some kind soul finally responded to me to tell me to wander over here with my query from where I was, so here's my post from the other day: Hi, just checking in to see if you can help me out: I'm trying to figure out the proper term/designation for the transmission in my first truck from over 20 years ago. I was working for a concrete company, and I was driving a '78 Mack R type, with a two stick transmission: one controlled the 5 speeds, and the other was forward high/forward low/reverse. (Also, mine was one of only two we had with an air controlled switch on the dash for deep reduction. Great truck for special pours!) Quote Link to comment Share on other sites More sharing options...
j hancock Posted August 13, 2014 Share Posted August 13, 2014 Maybe an early TRTXL107. Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
JReding Posted August 14, 2014 Author Share Posted August 14, 2014 Hey! I just found this, label looks familiar, even though it's more than twenty years ago now... http://www.rbunch.com/images/display/brown_108.JPG Quote Link to comment Share on other sites More sharing options...
85snowdog Posted August 14, 2014 Share Posted August 14, 2014 Hey! I just found this, label looks familiar, even though it's more than twenty years ago now...http://www.rbunch.com/images/display/brown_108.JPGThats a Mack 6 speed . Or a TRXL 107/1071. The TRXL 1071 has low low or a creeper gear. I don't know of an air switch on the dash though. Quote Keith Link to comment Share on other sites More sharing options...
j hancock Posted August 14, 2014 Share Posted August 14, 2014 Any chance the air switch was actually for the air lock power divider?The decal shown is for a 6 speed. Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
JReding Posted August 14, 2014 Author Share Posted August 14, 2014 The switch was some kind of auxiliary, allowing for much lower gear ratio... http://catalog.sandstruck.com/ImgMedium/S-8904.jpg Quote Link to comment Share on other sites More sharing options...
rick harper Posted August 14, 2014 Share Posted August 14, 2014 TRXL107A DENOTES AIR SHIFT ILO OF 2ND SHIFTER Quote Link to comment Share on other sites More sharing options...
Brandt Posted August 24, 2014 Share Posted August 24, 2014 I have a TRTXL1070B (12 spd) with the air switch on the dash. My set up allows you to use the dash switch to go into deep reduction. With this switch engaged the stick stays in the "first" gear position. I can air shift the stick to 2nd, then throw the dash switch and airshft the stick back to normal "first" if I need to. Usually I just go from Deep reduction 2nd to normal second gear.I'm sure there is correct terminology for what I am saying - I just don't know it!! Quote Link to comment Share on other sites More sharing options...
b61mack Posted August 25, 2014 Share Posted August 25, 2014 That looks like a switch and cover for a 15 speed Roadranger, they have deep reduction on the dash, is it hooked up?. Quote Link to comment Share on other sites More sharing options...
JReding Posted August 31, 2014 Author Share Posted August 31, 2014 (edited) Sorry, I'm working from distant memory... I was talking to a coworker about our past jobs. Last time I saw my '78 Mack was 1994. I'm sure it's long gone and recycled. But I couldn't remember what it was, and I'm one if those that will go crazy if I can't find out! Edited August 31, 2014 by JReding Quote Link to comment Share on other sites More sharing options...
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