ws721 Posted October 11, 2017 Share Posted October 11, 2017 Ok, so friend of mine just bought a Superliner that has Neway susp & a Mack 13 speed. Build sheet says it has 4.42 ratio. Now, the tranny has been changed from the Mack 9 speed. Truck has LoPro 24.5 tires. It will do more than 90 mph. And it still creeps around the yard nice & slow. My question is, what is the Over drive Ratio for a Mack 13/18 speed? Quote Remember if it's got a hood it's no good! Link to comment Share on other sites More sharing options...
j hancock Posted October 11, 2017 Share Posted October 11, 2017 13.91 on the low side and .71 on the high side. Check the stamping on the chuck. 4.42 with .71 @ 2100 rpm is 83 mph. 3.86/3.87 with .71 @ 2100 rpm is 96 mph. Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
ws721 Posted October 11, 2017 Author Share Posted October 11, 2017 We couldn't read the stamping on the rears. But that sounds like a great tranny with those numbers. What is the Torque rating? And thanks for that info Quote Remember if it's got a hood it's no good! Link to comment Share on other sites More sharing options...
j hancock Posted October 12, 2017 Share Posted October 12, 2017 Torque rating is in the 2000 ft lbs range. Mack triple shaft transmissions have moxie. 1 Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
ws721 Posted October 13, 2017 Author Share Posted October 13, 2017 (edited) Awesome. Think I want one of these Trannys for my Cruiseliner. Hmm, wonder if they make a top loader for shift linkage? That may be the deal breaker. Edited October 13, 2017 by ws721 Quote Remember if it's got a hood it's no good! Link to comment Share on other sites More sharing options...
fullfuel01 Posted October 13, 2017 Share Posted October 13, 2017 and me i want the old 6 speeds of your cruise-liner Quote Link to comment Share on other sites More sharing options...
ws721 Posted October 14, 2017 Author Share Posted October 14, 2017 On 10/13/2017 at 8:54 AM, fullfuel01 said: and me i want the old 6 speeds of your cruise-liner No Problem. I haven't removed it yet to keep the truck mobile. We did use to haul some antique trucks this summer. ! of these years I will get that project started Quote Remember if it's got a hood it's no good! Link to comment Share on other sites More sharing options...
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