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This is for GP series locos. I have another one for SD series. I have tested on GP38 so far. Look at the pics of the chassis I have included. If yours look like that, then it will fit. Proto Power Wes t. I have designed it so you can use the original Athearn motor mounts and install it on the chassis.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.