Odd noise when pressing accelerator

[Phljeeper]

I am experiencing a whistle or humming noise when driving above 50 mph and lightly touching the accelerator. It just started with about 9100 miles on it. I have a Rubicon running 35” tires and have a 1” spacer lift and aftermarket steering stabilizer (fox ATS adjustable). Everything else stock. No noise below 50 and no noise of above 50 and putting Jeep in neutral or letting off the accelerator. Giving it more gas by pushing harder on the accelerator makes the noise go away too. You can hear it loudest from the drivers seat and barely hear it on the passenger side. It’s currently at the dealer on day 5 with no resolution. They have replaced the front drivers side wheel bearing and that didn’t change anything. They also put stock tires on to remove any tire noise which didn’t change anything. Same noise. I do wheel the truck and have definitely used the skid plates. But no major issues. Any thoughts?

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[Phljeeper]

I am experiencing a whistle or humming noise when driving above 50 mph and lightly touching the accelerator. It just started with about 9100 miles on it. I have a Rubicon running 35” tires and have a 1” spacer lift and aftermarket steering stabilizer (fox ATS adjustable). Everything else stock. No noise below 50 and no noise of above 50 and putting Jeep in neutral or letting off the accelerator. Giving it more gas by pushing harder on the accelerator makes the noise go away too. You can hear it loudest from the drivers seat and barely hear it on the passenger side. It’s currently at the dealer on day 5 with no resolution. They have replaced the front drivers side wheel bearing and that didn’t change anything. I do wheel the truck and have definitely used the skid plates. But no major issues. Any thoughts?

Anyone have thoughts on this? A full week at the dealer tomorrow. Based on discussion with them Friday that have no idea what to do next.

 

[Phljeeper]

We may have found the issue. The dealer working with Jeep has used some listening tools (called Chassis ear) and have isolated the sound to the rear diff. Looks like either gears or locker issues in the diff causing the sound. I do use the Jeep on rock terrain so have activated the locker quite a bit. Possibly the gears or locker were improperly installed at the factory. They are replacing the entire rear diff. Lets hope that resolves the issue and I can get my Gladiator back. Looks like another week or two in a loaner.

 

[Phljeeper]

The noise is fixed! Apparently the rear differential was the issue and the dealer replaced the entire rear d44. They believe the locker or gears were installed incorrectly and when I activated the locker off-road I caused whatever was installed wrong to make noise. Odd. They sent the whole assembly back to Jeep to investigate. 3 weeks and 100+ miles of test driving my truck and I finally got it back.

 

[ShadowsPapa]

The noise is fixed! Apparently the rear differential was the issue and the dealer replaced the entire rear d44. They believe the locker or gears were installed incorrectly and when I activated the locker off-road I caused whatever was installed wrong to make noise. Odd. They sent the whole assembly back to Jeep to investigate. 3 weeks and 100+ miles of test driving my truck and I finally got it back.

They were WILLING to try. Kudos to them for that.
It's hard to track down noises sometimes. When I was in college a buddy of mine had a new compact pickup. It had a funny sort of "rattle" but only at certain speeds on certain roads. We were both in college for automotive so it was natural he had checked the thing over top to bottom, he went to a dealer who was unable to locate the sound. The pulled door panels, they checked everything (well, almost)
We decided to hit a local bar for lunch and I hopped in his truck - and after a while I thought I heard the sound, too. This was when I was younger, massive stereos and race cars hadn't ruined my hearing and I didn't wear hearing aids back then.
After a few minutes I though I had it nailed to a specific area. I asked him to stop the truck, I got out, leaned down and reached UP into the bottom of the passenger seat where a can had made its way somehow up into the seat bottom above the springs. Normally it was secure enough it made no sound but the right speed and road I suspect the harmonics of the metal parts, springs and such, it made itself known.
I don't know how many hours had been spent by him and others trying to find that - a chance drive out for some fun found it.

 

[Phljeeper]

They were WILLING to try. Kudos to them for that.
It's hard to track down noises sometimes. When I was in college a buddy of mine had a new compact pickup. It had a funny sort of "rattle" but only at certain speeds on certain roads. We were both in college for automotive so it was natural he had checked the thing over top to bottom, he went to a dealer who was unable to locate the sound. The pulled door panels, they checked everything (well, almost)
We decided to hit a local bar for lunch and I hopped in his truck - and after a while I thought I heard the sound, too. This was when I was younger, massive stereos and race cars hadn't ruined my hearing and I didn't wear hearing aids back then.
After a few minutes I though I had it nailed to a specific area. I asked him to stop the truck, I got out, leaned down and reached UP into the bottom of the passenger seat where a can had made its way somehow up into the seat bottom above the springs. Normally it was secure enough it made no sound but the right speed and road I suspect the harmonics of the metal parts, springs and such, it made itself known.
I don't know how many hours had been spent by him and others trying to find that - a chance drive out for some fun found it.

Very true. They worked hard to find the issue. Apparently they resorted to a technology called Chassis Ears which are a tech that has listening sensors that record all over the vehicle and send data back to a computer to find a sound. This is want found the issue and isolated it. Listening while driving made the sound come from the front drivers wheel but that must have just been echo on the drivetrain or ground reflecting a rear diff sound to come out the front. Anyone with an odd issue should ask for these Chassis Ears to be used. They appear to be magic.

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