Hi John, Lionel replaced both trucks. I got it back and same problem The front axel would jump off some Ross Switches and derail. Too much up and down movement on front axel. I took front axel off . There is a tiny spring on both ends of axel next to wheels. I try stretching spring to put more down pressure on axel. That helped some but didn’t totally solve the problem. Then I ordered a package of the smallest springs on Amazon that I could find the would be stronger and put more down pressure.None were small enough diameter to fit in small barrel that Lionel’s springs fit in. The springs were probably only two millimeters in diameter. They are much too soft. I ended up cutting and making a small post if you will and inserted inside spring. Made just long enough to reduce up and down movement of axel but still leaving some spring movement. Put on track and bam! Runs perfectly over Ross Switches. Lionel said they couldn’t test because they don’t have Ross Switches.You probably could eliminate spring and replace a solid piece in there that would cut the up and down movement of front axel to a minimum. Ps I ended up doing the same to back truck, because that would derail sometimes backing up.
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