Rule change for pit road - wrench color: This is not a ground
breaking rule changes but its something that NASCAR wants to see
changed. Starting next year, all track bar and wedge wrenches will need
be yellow. We don't know for sure but we're guessing that it has
something to do with being able to see it with the video cameras that
NASCAR implemented last year. Once again, that is just a guess as to why
they want them all the same color but for years teams have had all
kinds of colors on their wrenches. In some cases it was to help the
carriers know which wrench was a right side wrench vs. left or even to
help determine if it was their track bar wrench vs. wedge wrench. Either
way, teams will now all have the same looking wrench for the races. The
actual rule book reads as such: 21.2.5 Wrenches a. Wrenches
used to manually adjust the track bar and/or left and right side rear
jack screw during a pit stop must be painted bright yellow.(Pit Talks)(1-30-2016)