Mitsubishi Repair Problems? Ask a Mechanic for Answers ASAP
Hi,Can you identify if the sound seems to be more coming from the front or from the rear of the vehicle?
Thanks.Is there any change in pitch when you turn left or right, particularly at upper speeds?
Thanks.If you place the vehicle in gear and apply the brake pedal and parking brake firmly, then give it a little gas do you still not hear it unless the vehicle is moving?
Thanks.Given the sound you describe and when it is occurring, it almost sounds like it could be the transfer case whining, a somewhat common complaint. When they do that it is a high pitch tone and only heard on throttle. The second you let off the gas the load comes off the unit and it quiets down.Are you able to elevate the car (like on four jack stands, or a hoist etc) and run the vehicle so it can be listened to with a stethoscope in action?
I understand.Have them elevate the vehicle and "drive" it up to speed so it can be heard, then they can listen underneath with a stethoscope and listen specifically at:Transfer caseTransmission (Around differential area and bottom/center)Drive shaft carrier bearingsBack side of front knuckles (where axle goes through the brakes etc)From the sound of it with it relieving when you let off the gas that is very strongly leaning toward the transfer case. There are two ways this can occur... either from gear lash wear between the ring and pinion and from viscous coupler damage (if the vehicle was ever towed with any tires on the ground it will damage the coupler).In either scenario it isn't common to get to a point to leave you stranded, however it will usually worsen over time and will definitely not go away.If the vehicle was recently purchased and you are under any sort of agreement on condition of the vehicle etc... you definitely want to get this addressed by them ASAP. Of course that would go the same even if it were something else (wheel bearing, carrier bearing, etc), but all the more true if it is the transfer case since they are pretty expensive.Regardless.... the stethoscope inspection is required to figure out exactly what it is... then decisions can be made.