My 02 trail blazer makes a loud grinding/ whining noise when I let off gas?? Not the spline gears,what elese could it be?
It's coming from the rear end
Have you checked the brakes? The pads or rotor may be worn down. Wheel bearings? What I do, is find a quiet street or lot and drive with all the windows down, all noise makers turned off and listen to the sound that is made reflecting off a building. It may amplify it, and help identify the side it's coming from, and if it is a wheel area noise. Also have someone walk/run beside the vehicle to help isolate the noise. Does the noise go away when applying power, or putting on the brakes? Is it coming from the engine area? A water pump bearing freezing up? Alternator bearing going out? Try to isolate where the noise is coming from and then try to do a visual exam for any damaged or worn parts.