100% wrong. See guidance below from FTC.
A manufacturer can mandate whatever it wants to its dealers regarding price, sale territory, etc, as long as the mandates are reasonable.
Manufacturers can also terminate relationships with dealers who do not follow their policies.
Ford's relations with it's dealers are undoubtedly more complicated than just simple pricing agreements, but it is not inherently illegal to set and control pricing.
Reasonable price, territory, and customer restrictions on dealers are legal.
www.ftc.gov