The driving force of an automobile depends ultimately upon the relationship between the tire and road surface. Therefore, traction control, which prevents tire slip, is becoming an important issue from the point of view of driving performance and stability of automobiles. Fuzzy traction control, developed by one of the authors and a co-worker, has excellent performance that can be adapted to any road conditions. It became clear, however, that fuzzy traction control is still poor under abnormal conditions of light vehicle load or of low tire pressure. Therefore, another algorithm for traction control carried out through the detection of the gradient between driving force and tire slip, was proposed in this paper. Relatively good results were obtained.