I contacted Bachmann to see if they will repair an out of warranty item, but they told me the locomotives were too old and parts may not be available. 

At this point I think I have more spare parts than I have usable parts. 

Since posting thing, I went down to the train store. The guy down there confirmed what you said about the frog. I don't think rewiring is something I have the ability to do. There are also frog juicers, but that's also something I don't want to get into.

I looked into that, but the problem is that Bachmann only seems to offer this warranty to the original owner. Although this locomotive is new, I bought it on eBay.

I have a brand new Bachmann N Scale Santa Fe SD40-2 #5043 locomotive I'm trying to run on a Bachmann EZ Track layout. I can hear the motor grinding and the lights are on, but it rarely moves. And when it does it only moves an inch or so whether that be forward or backwards. I'm not sure but I think the wheels aren't aligned on the track. Any ideas? Thanks in advance to everyone that replies. BTW: I am running (or pulling) it through a rerailer section of track.

I have four Bachmann N gauge switches: 44859, 44860, 44861, 44860. This issue applies to all of them.
I have three engines. Two of the engines stop running after crossing the frog. I took them down to the train store and the person demonstrated with his meter that it stops getting power at the frog. The third engine is different than the other two. It's all wheel drive and it's longer than the other. That one seems to work. I'm not sure if it's because it's all wheel drive, or because of the length.
I'm not real keen on rewiring anything, even though the switches are supposed to be non-DCC. Anyone have any suggestions how to get around this?
Thanks in advance to all that reply.