Baxter Posted September 10, 2015 Share Posted September 10, 2015 Anyone ever open side cover on Mack transmission and find no pto gear to operate one? Quote Link to comment https://www.bigmacktrucks.com/topic/41714-mack-5-speed-trans/ Share on other sites More sharing options...
2stacksuperdog Posted September 10, 2015 Share Posted September 10, 2015 mack 5 speeds didn't come with the pto gear. you need to install it 1 Quote Matt Link to comment https://www.bigmacktrucks.com/topic/41714-mack-5-speed-trans/#findComment-303195 Share on other sites More sharing options...
Baxter Posted September 10, 2015 Author Share Posted September 10, 2015 Oh did not know that. Quote Link to comment https://www.bigmacktrucks.com/topic/41714-mack-5-speed-trans/#findComment-303215 Share on other sites More sharing options...
kt_Engineer Posted September 10, 2015 Share Posted September 10, 2015 The Mack Transmissions in general do NOT have a separate PTO gear . The bottom countershaft gear (overdrive - on front box) is located to be SAE compliant and will mesh with 6-bolt and 8 Bolt PTO. This offers weight and and cost benefit when compared to an Eaton transmission.This is true with majority of Mack transmissions but there were some transmissions like TM308 which had unique PTO gear. This was due to gear mesh not being in appropriate positions to be SAE Compliant.The attachment shows PTO gear for a 5-speed transmission. In the picture below it will be the countershaft gear meshing with 2nd gear in the front box.T2050.pdf Quote Link to comment https://www.bigmacktrucks.com/topic/41714-mack-5-speed-trans/#findComment-303225 Share on other sites More sharing options...
Baxter Posted September 11, 2015 Author Share Posted September 11, 2015 Hole Quote Link to comment https://www.bigmacktrucks.com/topic/41714-mack-5-speed-trans/#findComment-303293 Share on other sites More sharing options...
kt_Engineer Posted September 11, 2015 Share Posted September 11, 2015 What 5 speed transmission model is this? Quote Link to comment https://www.bigmacktrucks.com/topic/41714-mack-5-speed-trans/#findComment-303328 Share on other sites More sharing options...
kt_Engineer Posted September 11, 2015 Share Posted September 11, 2015 (edited) Looks like you have a old TRL1076 or TRL1078 - 5 Speed transmission. Unfortunately, this 1st generation triple countershaft Mack transmission 5 speed (prior to T107 the T772 was a single countershaft design) had only provision for installing the PTO gear. Edited September 11, 2015 by kt_Engineer Quote Link to comment https://www.bigmacktrucks.com/topic/41714-mack-5-speed-trans/#findComment-303355 Share on other sites More sharing options...
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