When we started kolb02's 4mill with the 1-5 nuetral down override duneable extreme , it started making a grindy noise like it was trying to engage into gear in nuetral. Like he said we shut it off and started it again and the noise quit. After hearing about the problems, I told my customer that it would be wise to pull the tranny out and go with a regular duneable override or have this one checked out. We pulled the motor tonite to remove the tranny and we are steering toward a proven duneable override, instead of taking a chance on the extreme override.