Reverser Gear Coupling 2 Loco Sound Flange Noise 3 Flange Noise 4 Short Air Release Light Bell Horn Air Release Uncoupling Lever Brake release/Squeal Dynamic Brake Air Hose/Uncoupling Lever Shut Down/Notch Down Fan/Notch Up Rail Clack Air Compressor Prime Mover Type Air Release Coupling Crash Air Pump Loco Sound Flange Noise 1 Bell Type Horn Type Loco Sound Bell Volume Horn Volume Diesel Rumble Volume Air Release Flange Noise 2 Loco Sound Sand Drop Air Release Linear Slow increase at slow speed Fast increase at slow speed Normal Headlights Off / Dim / Bright Cycle Rule 17 Auto notch - RPM and notch synchro to speed Manual notch - notch down/up with F8/F9 Type 1 Type 2 Off Range 0-2 (2 types - 2=diesel sound off) Type 1 Type 2 Type 3 Type 4 Off Range 0-4 (4 types - 4=diesel sound off) GE 7FDL-12 alternate type Off Range 0-2 (2 types - 2=diesel sound off) MRC