Ford Motor Co. has issued three safety- and emissions-related recalls and extended a transmission warranty affecting about 606,000 civilian and 1,200 police cars.

The car maker said it would replace heavy-duty steel wheels on the 1990-model Taurus police cars because they could break apart.

The company also recalled about 144,000 1989-90-model Ford Bronco and F-series super cabs with tip-slide seats to reinforce the floor pan, after cracks appeared in about 10 percent of the trucks.

Ford said it was recalling about 228,000 1986 Ford Thunderbird, Mustang, LTD and Mercury Cougar, Capri and Marquis cars with 3.8-liter engines because of potentially excessive exhaust emissions.

Ford also said it would extend the transmission warranties on about 234,000 1986-87 Ranger and Bronco II vehicles to six years or 60,000 miles, or six months from the notification date.

The company said a shift-lever housing could crack during a hard shift into gear. Brownie Mistake

Pillsbury Co. recalled a limited number of its Great Additions brand Double Chocolate Brownie Mix Tuesday because some boxes were inadvertently filled with Great Additions brand Walnut Brownie Mix.

The mix could be a problem to people allergic to walnuts, but it poses no other danger, the company said.

The mislabeled batch was distributed in Ohio, Kentucky, Michigan, Pennsylvania and Indiana.

Pillsbury is recalling packages with a production code of "FOK" followed by any number from 12 to 23. The codes are printed on the top flap of the mix box.

The ingredients pouch inside the box is correctly labeled.

Consumers who want a refund or replacement can return the product to their grocer or contact Pillsbury.