After AMC's buyout in 1987, Chrysler insiders speculated that AMC would take over the larger firm from within. Part of the reason was that AMC's Jeep Cherokee product line alone soon accounted for more than a third of Chrysler's profits. Several AMC leaders became stars at Chrysler, including product development boss Castaing who took over Chrysler operations and engineering. He was quickly named Chrysler Motors' new Vice President for Vehicle Engineering. The acquiring company was in desperate need to replicate the culture at AMC and Renault where work was conducted in an atmosphere "of constant change".