I need the name/classification of a locomotive?

Question

four axles

north-american

production beginning in 1990

help?

Answer 1

EMD Fright GP60, GP60m, GP60b,These are used by ATSF.

Passenger  F59PH

GE Fright  8-40BW,8-32BWH.

Passenger  P40DC,P42DC ( aka AMD-103),

Answer 2

With 4 axels it is in the calss GP, or general purpose.

Can't tell much else with available information.

Answer 3

Electro-Motive Diesel and General Electric are the largest builders of those in North America.

Suggest you check one of those two sites.

Answer 4

It's either built by GE or EMD.  4-axles means

B40-8, B36-8, B32-8, GP60

A description of the body of the locomotive would help.