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Old 11-15-2009, 11:12 AM   #10
Bryan Jones
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Join Date: Dec 2002
Location: Brooks,KY
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Originally Posted by troy12n View Post
Also, not to further confuse things, SP SD45's rebuilt in the 1980's to SD40-2 standards on SD45 carbodies were called SD40M's as well. Some of these still exist on UP, some even repainted into UP colors.
The units which were rebuilt for SP by Morrison Knudsen were classed as SD40M-2. SD40M does not indicate. SD40M would just indicate a modified SD40 and that it has not had an electrical or control system upgrade.

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