NAVISTAR IS RECALLING CERTAIN MODEL YEAR 2010 AND 2011 INTERNATIONAL 4300M, 8600, LONESTAR AND PROSTAR BRAND TRUCKS MANUFACTURED FROM MAY 6, 2009 THROUGH MAY 25, 2010. THE FASTENER THAT CLAMPS THE PITMAN ARM TO THE STEERING GEAR SHAFT MAY HAVE BEEN UNDERTORQUED UPON ASSEMBLY. AN UNDER TORQUE CONDITION MAY CAUSE WEAR OF THE INTERCONNECTING SPLINES OF THE ARM AND THE SHAFT POSSIBLY ALLOWING THE PITMAN ARM TO SLIP OVER THE SHAFT RESULTING IN A REDUCTION OF STEERING CONTROL.