This is a sound and physics mod for the locomotives included with High Iron Simulations' Bozeman Pass.
The sound pack includes the following...
- RPM adjustment for the SD45 Engine Sounds
- Old Cast P3 for the Northern Pacific SD45 and GP9 (Credit to Stephen Bulla, HORNMASTERS)
- Leslie RS3K for the Burlington Northern SD45, GP30, and GP9 (Credit to Mikiwikistown)
- Hand-Rung Steam Locomotive Bell for the GP9 (Credit to Mikiwikistown)
- EMD Bronze Bell for the SD45 and GP30 (Credit to Mikiwikistown)
- Leslie A200 for the FT and SW1200 (Credit to Stephen Bulla, HORNMASTERS)
- Early EMD Bronze Bell for the FT and SW1200 (Created by Me, From a YouTube Source I Can't Find Anymore)
- 16-567B Sounds for the FT (UTS Creations)
- Fixes the No Audio Error for the 2-Bay Covered Hopper and Wide Vision Caboose
- Krellnut's Freight Car Sounds Added
The physics mod includes the following...
Locomotive Weight Adjustment
- SD45: 382,000 lbs
- GP30: 263,000 lbs
- GP9: 253,000 lbs
- FTA: 230,000 lbs
- FTB: 218,000 lbs
- SW1200: 245,000 lbs
Locomotive Fuel Capacity Adjustment
- SD45: 4,000 Gallons
- GP30: 1,700 Gallons
- GP9: 1,100 Gallons
- FT A & B: 1,200 Gallons
- SW1200: 600 Gallons
Locomotive Performance Adjustment:
- SD45
- RPM Range: 318 to 904
- Max Power: 3,600 HP
- Max Power At Rail: 3,240 HP
- Starting Tractive Effort: 102,850 lbs
- Continuous Tractive Effort: 83,089 lbs
- Dynamic Braking Effort: Approximately 58,000 lbs (Correct me if I'm wrong)
- GP30
- RPM Range: 275 to 835
- Max Power: 2,250 HP
- Max Power At Rail: 2,025 HP
- Starting Tractive Effort: 63,375 lbs
- Continuous Tractive Effort: 50,000 lbs
- Dynamic Braking Effort: 40,000 lbs
- GP9
- RPM Range: 275 to 835
- Max Power: 1,750 HP
- Max Power At Rail: 1,500 HP
- Starting Tractive Effort: 64,750 lbs
- Continuous Tractive Effort: 44,600 lbs
- Dynamic Braking Effort: 40,000 lbs
- FT
- RPM Range: 275 to 800
- Max Power: 1,350 HP
- Max Power At Rail: 1,215 HP
- Starting Tractive Effort: 62,000 lbs
- Continuous Tractive Effort: 40,000 lbs
- Dynamic Braking Effort: Approxiimately 45,000 lbs
- SW1200
- RPM Range: 275 to 800
- Max Power: 1,200 HP
- Max Power At Rail: 1,179 HP
- Starting Tractive Effort: 63,375 lbs
- Continuous Tractive Effort: 34,000 lbs
- SD45
SD45 and GP30 Number Adjustments:
- SD45: #6430 to #6456 (Ex-GN), #6472 to #6567, #6570 to #6576 (Ex-Colorado & Southern), #6650 to #6696 (Ex-Frisco)
Note: This does not include the Ex-CB&Q nor Ex-NP numbers, as they had different specs from the BN SD45 included. - GP30: #2200 to #2216 (Ex-GN)
Note: All other numbers have been elimitated, as the rest of the numbers are Ex-CB&Q, which had different specs.
- SD45: #6430 to #6456 (Ex-GN), #6472 to #6567, #6570 to #6576 (Ex-Colorado & Southern), #6650 to #6696 (Ex-Frisco)
Coupler Slack Adjustments:
- MaxDistance set to 0.1
- TargetDistance set to 0.05
- SpringCoefficient and Damping set to 0
Credit goes to Fan Railer for the original physics mod for the GP30 and GP9. The FT partially uses his F7 Physics Mod. The SD45 partially uses his SD40T-2 Physics Mod.
To install...
- Drag and Drop the "Assets" folder here...
- (C):\Program Files (x86)\Steam\steamapps\common\RailWorks
- Overwrite when asked to do so.
That's it! If you encounter any problems or have any questions or comments, drop them down in the comments below!
Requirements:
UTS Creations FP7 & F9 Sound Set
https://drive.google.com/file/d/1ndXRyLcxOxYCh1-No2Q4eEcO1J9rBngR/view
Krellnut's U.S. Freight Car Sounds
https://railworksamerica.com/index.php/download-library/sounds-enhancements?view=document&id=2470:krellnut-s-u-s-freight-car-sounds-2015&catid=25:sounds
Requirements

UTS Creations FP7-F9 EP 7822.7z
Google DocsInstallation Instructions
To install...
- Drag and Drop the "Assets" folder here...
- (C):\Program Files (x86)\Steam\steamapps\common\RailWorks
- Overwrite when asked to do so.
That's it! If you encounter any problems or have any questions or comments, drop them down in the comments below!
Additional Comments
1/20/2025 Update: I've elimintated the internal air hiss for the GP9 bell, as it is hand-rung, not air-powered.
Files
HIS_Bozeman_Pass_Locomotive_Physics_Sound_Mod.zip 154 MB · Added 17 days ago · Downloaded 41×Previously uploaded files have been downloaded 131 times before being withdrawn.
Comments
I'm having some issuse with the SD45 amps are not going up or moving at all the other loco seem to work fine just SD45.
Did you make sure to release the Independent Brakes before applying the Throttle?
Yeah I kind of figured that out sorry having one of those slow day but I got it working thanks.
No worries! Glad I could help!
UPDATE: I've corrected an error I made with the NP Wide Vision Caboose. The path for the numbering DVSC was wrong, which made the caboose have no numbering. I changed the pathing to where the numbers on the caboose would show.
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About this mod
- Created
- 16 Dec 2024
- Updated
- 17 days ago
- Game
- Train Simulator Classic
- Type of content
- Enhancement pack
Could you include the fix for the amps being cut out when there's brake cylinder applied in the SD45?
In the SD45 Engine Simulation file, the setting is "CylinderPressureForBrakeToCutPower", and it should be set to 0.
I'll look into it.