Maybe this is better on Penn-Central but it was here so here I go,
I ran the GP-35's much on the River Line between New Jersey and Selkirk
and found that if I had a solid consist of just GP-35's, they ran very good
and did a good job but if I had an assortment of different locomotives, the
GP-35('s) would not generally run good at all. Trainsition problems and
wheel slip (or false wheel slip) problems and frequently dropping their
load among other things. Had them once or twice on a way freight and
they were not too bad, same on a work train. Unfortunately, the railroad
did not see fit to run them by themselves, rather have them out there
where at least on paper, they were doing their job. Most of the time, they
were just wasting fuel.
Noel Weaver