TSB: Some 2004 - 2015 model year Tacoma, FJ Cruiser, and 4Runner vehicles may exhibit a cyclical grinding or groaning noise coming from the front differential in 2WD that goes away when operated in 4WD. This noise can be addressed by replacing the needle bearing on the left side of the front differential. Refer to the Repair Procedure for Needle Bearing Roller replacement instructions.
