pictures

I'm looking for the

I'm looking for the manufacturer of the model, (ie - Athearn, Bachman, etc) not necessarily the prototype model (which appears to be an EMD GP-20 or GP- 35 or similar model)

Athearn GP38-2's

That is an Athearn GP38-2 (blue box) assuming it has 2 rad fans at the back of the long hood.

Not THAT old

Looks like it might have been repowered with a ProtoPower Mashima or some other kit.

Yup

That's an Athearn GP38-2, and the motor appears to be from the special A-Line/Proto Power kit specifically for the Athearn GP38-2/GP40-2/GP50, as it's intended to fit between the plastic reinforcements cast into the inside of the shell above the mounting tabs.  Other repower kits tend to have a motor that's too long for the available space, and they can hang up on on the shell when you take it off. 

Whoever installed the motor looks to have done a sloppy job of it. For best performance, the motor shafts should line up as close as possible with the worm shafts.  Sometimes you have to grind part of the frame away to get the motor low enough for this.  That motor sits high and is so crooked there's a big mismatch with the rear worm shaft.  That will affect how smoothly the mechanism runs, and adds noise.  I have several of these mechanisms on my layout, and they run quite well once they're tuned up.

Look Like

It looks like they tried to add some weight underneath the motor by filling the original motor mount depression with either lead or some low temp metal. Then they propped the new motor on top of some scraps of styrene.

You might want to replace the chassis with one from a "dummy" GP-38-2. They are fairly common (and inexpensive) at train shows.

George

thanks for all your info

thanks for all your info guys!

locomotive

Looks like an Athearn chassis, and a Kato shell