Thanks for the info. Upon checking that I found that the motor housing has come loose at the seams. Going to try and fix. If I can't do you know if the new style motors will work in the old chassis.Thanks for all your help

I just purchased a second hand Bachman 0-6-0 with tender,The motor spins but the wheels won't drive. The motor worm gear wont stay ingaged with the mian drive gear. Has anyone had this problem and what is the fix?...Thanks