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Reply to "Wheel wobble on AF Northern"

Very early production steamer and diesels have bushings but not after those.  Definitely not a 336.  Other things can contribute to wheel wobble as mentioned.  Even drivers out of quarter can give that illusion while running.  To test for bushing/frame wear, turn the engine over, pinch across a pair of drivers with your thumb and index finger and try to move them diagonally front-back, up-down.  Shouldn't feel a lot of travel.  Try it on several engines for comparison.  

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