DETROIT (AP) _ General Motors Corp. has announced it is recalling 2,700 of its 1984 and 1985 Pontiac Firebird Trans Am cars for free replacement of special 16-inch cast aluminum wheels.

GM said Wednesday that the castings were too porous and thus not as strong as they should be, particularly around the hub.

The company said it knew of no accidents or injuries related to the defect. Pontiac spokesman Tom Tripolsky said a dealer discovered the problem.

Dealers will put on new wheels and balance the wheels and tires at no charge, GM said.