what is it with MTH a-b-a's trailing truck "bouncing"?

jini5OGR Forum Member SUPPORTING MEMBER

I own some A-B-A's from MTH. Whether its E-8's, DL-109's, F-3's, etc. When pulling a load at slow speeds (below 8 scale MPH) , the trailing truck wants to jump up and down. I dont seem to have an issue if the consist is pulling up hill but going down hill I get the truck jumping. I believe the weight of the consist pushing on the rear loco while going downhill is causing the motor to partially lock up. Jerky operation and jumping of the truck. So if anyone knows what I am talking about,do you have any ideas or fixes? Would replacing the rear blind axle (on a 3 axle truck) with a 3 rail pizza cutter axle keep that truck on the rail instead of jumping?

8/1/2012:21 PM

Original Post

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