I recently picked up a new Limited, my fourth RAM but the first to not have a the Hemi. So far I'm loving it but there's one issue I can't seem to figure out.
At highway speeds I am hearing a very slight humming or whistling sound coming from what sounds like the rear of the truck. It's easiest to hear at ~75mph and ~2100RPM. When I hear it, if I release the throttle or add significant throttle, the sound lessons to the point of being very hard to detect.
I am still running the factory Pirelli Scorpions which I've known, especially when new, to be a quiet tire. The break-in procedure was followed, as prescribed, until the 500mi mark. I have yet to do any towing or go wide open throttle. This is also definitely not the sound of spooled turbos.
The issue:
- hum/whine/whistle at high speed
- possibly occurring at lower speed, lower gear, same RPM
- Releasing throttle diminishes sound
- Increasing throttle diminishes sound
- Sound level wise, casual conversation will overpower it
My theories:
- Tire noise despite what I mention above. My last truck had the same Pirelli's and I don't recall hearing this sound
- The frequency of the engine/exhaust is resonating with something
- Trouble in the rear diff
- The noise cancellation system is not functioning properly
Has anyone else noticed this in their truck?
At highway speeds I am hearing a very slight humming or whistling sound coming from what sounds like the rear of the truck. It's easiest to hear at ~75mph and ~2100RPM. When I hear it, if I release the throttle or add significant throttle, the sound lessons to the point of being very hard to detect.
I am still running the factory Pirelli Scorpions which I've known, especially when new, to be a quiet tire. The break-in procedure was followed, as prescribed, until the 500mi mark. I have yet to do any towing or go wide open throttle. This is also definitely not the sound of spooled turbos.
The issue:
- hum/whine/whistle at high speed
- possibly occurring at lower speed, lower gear, same RPM
- Releasing throttle diminishes sound
- Increasing throttle diminishes sound
- Sound level wise, casual conversation will overpower it
My theories:
- Tire noise despite what I mention above. My last truck had the same Pirelli's and I don't recall hearing this sound
- The frequency of the engine/exhaust is resonating with something
- Trouble in the rear diff
- The noise cancellation system is not functioning properly
Has anyone else noticed this in their truck?
