UP AC4400CW - Seven Pack

Seven different varieties of UP AC4400CW's, including clean and weathered versions and a Southern Pacific patch.


Tehachapi Pass: Mojave - Bakersfield Route: https://store.steampowered.com/app/1560935/Train_Simulator_Tehachapi_Pass_Mojave__Bakersfield_Route_AddOn/

Installation Instructions

Copy "AC4400CW.GeoPcDx" from
and paste it in

Copy "AC4400_CAB.GeoPcDx" from
and paste it in

The locomotives are listed as:
"GE AC4400CW UP 01"
"GE AC4400CW UP 01 W"
"GE AC4400CW UP 02"
"GE AC4400CW UP 02 W"
"GE AC4400CW UP 03"
"GE AC4400CW UP 03 W"
"GE AC4400CW UP Patch 01"

Additional Comments

-4K decals
-Modified engine script for faster light fade
-Modified light color
-Day/night light casting
-Matte cab

Day/Night Casting

This pack includes a feature which allows for the lights to dynamically cast light based on the time of day or being inside of a tunnel. The total range of the light is 150m.

Light casts at the following times:
Autumn: 6:20 PM - 7:15 AM
Spring: 8:00 PM - 6:00 AM
Summer: 9:00 PM - 5:00 AM
Winter: 4:20 PM - 8:00 AM

Huge thanks to the folks at C&J's Paint Shed for allowing the release of these reskins.

Any questions, comments, or concerns contact me at RWA, username: nwkrailfan

Tags: ac44 ac4400cw patch southern-pacific union-pacific weathering


LAL_UP_AC44_Pack1.zip 99 MB · Downloaded 407×


Avatar of StevenJam
StevenJam 2 Apr 2022

Great mod, really add some great variety to UP scenarios!

Avatar of z0rzx
z0rzx 2 Apr 2022

These look great man, thanks for sharing!! I am encountering a problem though... whenever I try to DRIVE the locomotive, my game crashes, giving me the dreadful "Out of memory" error, despite having around 8 GB of memory free, with the game best optimized to my system... I can spawn them, they load, I can hop in a locomotive that works and go free looking around them, but the second I try to drive it, my game freezes and crashes... any recommendations? Thanks.

Avatar of zacke
zacke 3 Apr 2022

Really amazing repaintings!
But unfortunately I have exactly the same problem as z0rzx describes above. I get the same consequences despite the large available memory ...
What to do? Thanks.

Avatar of Jessica
Jessica 11 Apr 2022

Repeatedly getting OOM crashes as well whenever I try and run the locomotive. I can load into a freeroam scenario just fine, but the moment I click on it, the game crashes. I've even tried reinstalling the pack and it didn't work.

Avatar of z0rzx
z0rzx 13 Apr 2022

Seems like a lot of people are having this problem, hopefully nwkrailfan addresses it soon...

Avatar of Zach H
Zach H 20 Jul 2022

Still any fix for the Out of Memory errors? Dissapointed these exist with such a good pack.

Avatar of VCRP
VCRP 24 Nov 2022

Will this ever be fixed?

Avatar of Missouri Pacific enthusiast

to anyone who has OOM errors when using this locomotive you need this https://utscreations.weebly.com/store/p22/Southern_Pacific_AC4400CW.html
since the scripts are from this

Avatar of suzukisk
suzukisk yesterday

These look and sound great. Thanks

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About this mod

31 Mar 2022
31 Mar 2022
Train Simulator Classic
Type of content
NA Operator
UP - Union Pacific