I believe I have seen this discussed before and a "fix" offered , but apparently my search skills are nearly as defunct as my physical abilities have become with age so- here goes. My PE engine from set 6-31960 derails on the start of some curves and/or coming out of the curves. It is NOT the track as other engines have no problem AND when I remove the lead truck from the PE engine all is well! I thought at one time there was reference to a repair/fix that Lionel offered. The lead truck does seem to bind/stick in one position that causes the derailment. Lube makes no real difference. Any help and or links/thoughts would be appreciated. I KNOW that the Forum/members have the wisdom that I lack!