today I learned that my tractor that I have been in for the last 2 years will be re assigned to a route that has fewer miles on it . The thinking is this: two of the same module tractors have a huge difference in millage, due to the route they have been deployed on. 1 tractor may have 89000 miles on it and a identical tractor may have 117601. So by switching the tractors routes, with each other they can thou the change close the gap in miles within the 2 tractors there by keeping the affected tractors close in millage and age. I understand this logic, but am troubled by the fact that I keep "my tractor"clean and do not smoke. The possible replacement tractor that I may be slammed with could have a 2\36th inch layer of #3 nicotine on the interior of the tractor, every inch covered in a yellow sticky foul smelling chemical that resists all known solvents that can remove this sinister substance completely So I now loose my smoke free environment and enter a hellish foul tasting and sticky environment laden with smeared covered surfaces of a byproduct that was invented as a lubricant. Is this being done at other terminals or not?