Three of Chrysler’s secured creditors are mounting a fresh attempt to thwart the carmaker’s Chapter 11 reorganisation on the grounds that it violates their legal rights and the US government’s authority under the Troubled asset relief programme.

The three – all Indiana state pension funds – are among a group of 46 creditors that had appeared to back away this month from efforts to derail the process under which a “new” Chrysler would emerge from bankruptcy protection by July 1. The new entity would be owned by a union healthcare trust, the US government and Italy’s Fiat.