Westinghouse Air Brake Company
From 1987 until early 1991, the R33 cars were overhauled and rebuilt by the MTA's 207th Street and Coney Island Overhaul Shops. All cars were refitted with General Electric equipment. Existing General Electric cars received New York Air Brake Newtran brake packages; the former Westinghouse cars received an updated brake package from the Westinghouse Air Brake Company.