This article or section may need to be rewritten. You can help Locomotive Wiki by improving it!
Please remove this notice if the page has been edited majorly.


The SD32ECO is a model in the EMD 710 ECO Repower program, a program launched by EMD in 2008. The EMD ECO program has since branched out to other models. The core unit received a rail up rebuild.  The old 645 prime mover is removed and a new 12–710G3A–T2 prime mover is implanted. The units also receive new microprocessors and cabs. The car bodies are refurbished and new alternators are installed. This yields a 25+% reduction in fuel usage and brings the locomotive up to Tier 2 standards. These units achieve 3,150 hp. 

BNSF is currently the only owner of SD32ECO's, with three units, all using SD45-2 cores. The units carry numbers 1350-1352. The SD45-2's were rebuilt to SD32ECO's in Jan-March 2013. BNSF is using them in KC right now.

Note: UP's SD59MX's are labeled SD32ECO's by EMD.

Decoding this EMD ECO designation

SD- Special Duty (core unit)

3- 3,150 hp

2- Tier 2 compliant

ECO- repowered w/ 710ECO prime mover