Store Page
American Truck Simulator
All Discussions Screenshots Artwork Broadcasts Videos Workshop News Guides Reviews

American Truck Simulator

Store Page
American Truck Simulator >  Workshop > BreadForMen's Workshop
94 ratings
3.55 and 3.70 Differential for 18-speed
Description Discussions0 Comments11 Change Notes
   
Award
Favorite
Favorited
Unfavorite
Type: Truck parts
Brand: Kenworth, Peterbilt
Truck parts: Transmissions
File Size
Posted
49.290 KB
Jul 4, 2018 @ 12:11pm
1 Change Note ( view )
Created by
BreadForMen
Offline
See all 91 collections (some may be hidden)
9,862 Unique Visitors
5,488 Current Subscribers
135 Current Favorites

Subscribe to download
3.55 and 3.70 Differential for 18-speed

Description
This mod adds 3.55 and 3.70 differential ratios for the 18-speed Eaton-Fuller Ultrashift transmission used in all of the default SCS trucks.

Using the 3.25 (stock SCS 18 speed) differential in gear 18:
  • @ 55mph, engine speed is around 1100RPM
  • @ 65mph, engine speed is around 1300RPM

Using the 3.55 differential in gear 18:
  • @ 55mph, engine speed is around 1200RPM
  • @ 65mph, engine speed is around 1400RPM

Using the 3.70 differential in gear 18:
  • @ 55mph, engine speed is around 1250RPM
  • @ 65mph, engine speed is around 1500RPM

These higher ratio differentials allow more acceleration from a stop as well as traversing hills especially with a lower powered truck. If you're into hauling heavy loads or just want to get going quicker, I recommend the 3.70 option. You might notice a decrease in fuel economy as a result of the engine being at a higher RPM while cruising.

NOT TESTED WITH OTHER TRUCK/TRANSMISSION MODS! USE AT YOUR OWN RISK!
11 Comments
< >
Lakaykonak! Dec 18, 2023 @ 12:19am 
is this working for v.1.49+?
lucabeached Dec 7, 2020 @ 3:16pm 
can u please make one for the western star 49x
SlaBog6213 Jul 10, 2020 @ 3:44pm 
I sey ones !!! American Trucks do not have RITARDER! it is jake brak ,it is totaly different ,ritarder is in gearbox ,jake brak in cilinder hade !!!
Zippy405 May 26, 2019 @ 7:57pm 
Did you just edit the def file? And will this work on MP?
HunterKiller Mar 21, 2019 @ 8:45pm 
Do I still need to run 90m/ph to get into 18th gear?
steve Jan 18, 2019 @ 11:50am 
im looking for a 18 speed transmission with a retarder for the mack r series can anyone help.
zipwyp Nov 10, 2018 @ 10:02am 
dose it make the gears lower
Bob_Americana Aug 5, 2018 @ 3:21pm 
Zach-- those old mack motors were designed to run in the range of 1900-2100 rpms.....my dad drove one of those Macks...he got it to 80mph on level ground , fully loaded...of course that truck only got 3mpg's on a good day
ZachTheDack Aug 5, 2018 @ 2:39pm 
Good mod! However, can you do a transmission for the Mack R Series that was just released by Harven? Would love to see an 18 speed for it or a 13 speed with a differental that doesnt top out at 55. Would really appreciate it!
RingingEars Jul 16, 2018 @ 7:46pm 
Excellent mod. A little more realism for us using wheel/pedal/shifter/shifter knob combos. No more constant motor killing on hill starts...