A warranty and price dispute between Ford Motor Co. and Navistar International Corp. could disrupt sales of Ford’s new Super Duty trucks later this year. Navistar, which has supplied diesel engines to Ford since 1979, halted production Feb. 26 at its plants. Ford sued Navistar in a Michigan court last month, claiming that Navistar did not properly share warranty costs. Ford says it has enough parts to support sales “in the short term.” The new F-250, 350 and 450 Super Duty trucks went on sale in early February.