I have bought 4 G.E. 70 ton locomotives.  Two of the decoders stopped functioning during the break in run.  I replaced them with digatrax decoders.  Has any one had problems with the factory installed decoders?
Mike

To help with the sound, I took my 70 tonners apart and lubed the bearing at each end of the locomotive and the universal joints.  I used a heavier oil on the brass worm gear.  The ran a lot quieter.    But when I put the shell back on some of the noise returned.  Better and quiet enough to use them on the railroad.

On youtube there are a couple video's of G.E. 70 tonners with sound, which engine I do not know.

I have several G.E. 70 ton locomotives, everyone of them is so noisy that I do not run them on my layout.
Has any one figured out how to quiet them down.  I have used oil, gear lube with no results.  Next would be tearing them apart, a last resort.

Mike