You will not like any lower gear than a 3.55 ... maybe a 3.42 If I can find the hp/torque curve for an emodel I will post it
One of my buddies went from a 3.70 to a 3.36 on his 6nz to run lower rpm out west. The combination of lower RPM making less HP/Torque lost him almost a mile per gallon vs keeping the motor spun up.
change rear end ratio or change transmission
Discussion in 'Trucks [ Eighteen Wheelers ]' started by spurmonkey, Nov 7, 2020.
Page 3 of 3
-
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
-
Rideandrepair Thanks this.
-
I appreciate all the comments, ive located a set of DS404 336 rears im going to throw in and give a try. im getting both diffs for little of nothing cost wise. i figure ill try just running in 16 or 17 most of the time unless i get out in the flat lands and can crank her up and run in the high hole. i guess iff i dont like it i can always throw my 370s back in her.
uncleal13 Thanks this. -
What are all the ratios? Like is each ratio a certain distance from each other or are they just kinda random? I’m 22 I’m looking to buy a truck this year and want to make sure I’m not in this situation haha. My company truck right now is a 379 with a c13 to a single turbo with 3.55 and 13 speed and its running about 1550 at 70. I never run it higher or faster unless I’m passing someone cause it just sounds like it’s working so hard. How high is the highest rpm you should be cruising at?
-
AModelCat Thanks this.
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
Page 3 of 3