TMZ Sports has obtained more details about Lenny Dykstra's New Year’s Day traffic stop ... with cops suspecting the former Mets star had either crack or meth on him.
Pennsylvania State Police claim Dykstra -- who was the passenger -- opened the glove box during questioning just after midnight to confirm his identification ... and they observed in plain sight a "container holding suspected crack-cocaine/methamphetamine and a glass smoking device containing suspected drug residue."
Police didn't field test the substances, but he since has been formally charged with misdemeanor possession of drugs and drug paraphernalia, according to local reports.