Lionel 6-28649 Polar Express Berkshire Locomotive #1225 will only go in reverse
No doubt the transistor in the motor controller inside the engine is shorted TIP31C Q6 If you have the skills you can repair the unit. Parts are cheap, like 50 cents. Expense is shipping. Have repaired at least one that had the probblem you describe
good luck
I have this exact same problem. Didn't anyone post a solution?
73-1960-250 in to search. This is a PDF file for the Polar Express which was released by Lionel in 5/05. You can also go directly to: http://www.lionel.com/media/servicedocuments/73-1960-250.pdf
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its the little white gears that are worn. Just need new white gears so they don't slip
need copy of repair/service manual for prewar 763E locomotive
Thanks
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