The translocation of the cell body forward during cell migration, mediated by tractional force on its substrate and tension in the cortical cytoskeleton. Adhesions transmit propulsive forces and serve as traction points over which the cell moves. [ http://www.ncbi.nlm.nih.gov/pubmed/14657486 https://www.worldcat.org/search?q=bn%3A0815316194 http://www.ncbi.nlm.nih.gov/pubmed/11944043 ]