Athearn RTR 73635 HO Scale EMD SD40 Southern Pacific SP "Kodachrome" 7384 DC Theme_Classic These adjustable front spindles give

These adjustable front spindles give racers the ability to tune Ackermann

Standard GP40-2L details to represent units (potentially) acquired secondhand from CN

All new 22S aluminum chassis

The new GEN3 Slipper Unit is a captured design to prevent slipper pad blowout and deliver maximum power to the ground

Athearn RTR 73635 HO Scale EMD SD40 Southern Pacific SP "Kodachrome" 7384 DC Theme_Classic These adjustable front spindles giveAthearn RTR 73635 HO Scale EMD SD40 Southern Pacific SP "Kodachrome" 7384 DC Southern Pacific instituted a rebuild program for their SD40s in 1980 1981. The units were updated to Dash 2 electrical standards, as well as receiving electrical cabinet air filters just behind the cab on the firemans side. They were placed in the 73XX number series. A few units received the attractive red and yellow paint scheme of the proposed Southern Pacific Santa Fe