Kansas farmer Posted June 5, 2016 Share Posted June 5, 2016 Ok guys we switched the rearends on the truck now I can out pull other trucks up hold but once we hit the top they can catch back up and sometimes get passed me a bit. 91 ch e7 400 turned up a bit t2180 trans 3:58 rears tall 24.5 rubber. Sent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/45520-pulling-issue/ Share on other sites More sharing options...
RedBullDog Posted June 5, 2016 Share Posted June 5, 2016 3 minutes ago, Kansas farmer said: Ok guys we switched the rearends on the truck now I can out pull other trucks up hold but once we hit the top they can catch back up and sometimes get passed me a bit. 91 ch e7 400 turned up a bit t2180 trans 3:58 rears tall 24.5 rubber. Sent from my iPhone using Tapatalk With 3.58 rears behind an 18, are you running in 17 or 18 with a load on? It seems like with that tall of a setup, it may be lugging a bit. Quote Link to comment https://www.bigmacktrucks.com/topic/45520-pulling-issue/#findComment-335543 Share on other sites More sharing options...
bts-4120 Posted June 5, 2016 Share Posted June 5, 2016 65mph in the would be 1300rpms or less? I've seen this set up before its made to run 18th empty and 17th with a load. I would rather run 4.17 gears with your set up but it not mine 1 Quote Link to comment https://www.bigmacktrucks.com/topic/45520-pulling-issue/#findComment-335546 Share on other sites More sharing options...
RedBullDog Posted June 5, 2016 Share Posted June 5, 2016 My setup is similar, same tall rubber and trans, but 4.42 rears. 17 is good on 2 lanes and under 60, 18 is highway gear, loaded or empty. I need to be able to back up loaded, and creep across wilderness though too, so the 4.42 fit me well. I used to see a few trucks set up for !8th to be a fast and empty gear when I hauled grain. A friend had it in his pete, and I would run right with him until "flip" then it was over. Quote Link to comment https://www.bigmacktrucks.com/topic/45520-pulling-issue/#findComment-335549 Share on other sites More sharing options...
Kansas farmer Posted June 5, 2016 Author Share Posted June 5, 2016 Sorry should have added some info. Pulling the ground load on interstate gross 60-65000 cruise set at 75-77 18th around 1650 rpm. Pulling 3/4 to mile grade usually drop to 17th seldom go to 16 unless there a hard wind. Sent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/45520-pulling-issue/#findComment-335583 Share on other sites More sharing options...
Kansas farmer Posted June 5, 2016 Author Share Posted June 5, 2016 We switched from 442. Just didn't have enough legs for what we do with it. It pulls great just that hill issue. May just be the nature of the beast. Sent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/45520-pulling-issue/#findComment-335585 Share on other sites More sharing options...
RedBullDog Posted June 5, 2016 Share Posted June 5, 2016 There's a lot of wind resistance moving at 75. More than likely just a little lack of engine displacement, second over with tall rears takes some torque to hold speed Quote Link to comment https://www.bigmacktrucks.com/topic/45520-pulling-issue/#findComment-335598 Share on other sites More sharing options...
Dirtymilkman Posted June 6, 2016 Share Posted June 6, 2016 Switch to low pro's. Quote Link to comment https://www.bigmacktrucks.com/topic/45520-pulling-issue/#findComment-335699 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.