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Discussion Starter · #1 · (Edited)
I’m sorry in advance if this issue was brought up.

I have a 2012 Jeep SRT-8 with about 28,000 miles on it. Lightly driven used on the weekends.

Recently I noticed once the truck is hot I get a hum/ grinding noise from the truck when driving. The slower I go the louder the hum is and it sounds like it’s coming from a rotation of something. The faster I go the hum becomes quieter and faster until it disappears. When I press the brake the noise disappears once the brake is let up noise comes back. The noise happens whether I’m pressing the gas or not. The brakes were changed at 17,000 miles and it’s nothing like the noise the brakes make when they have to be replaced.

My mechanic switched my rear diff oil hoping it would stop but it didn’t. He says I might need a new rear diff but before I dumped money into something we’re not sure about wanted to reach out to the community to see if I can get any advice.

Thank you in advance!!!!!
 

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I started having the same issue on my 2015 SRT GC with about 20K miles on it. Sounds almost like a wheel bearing but does not seem to change with any kind of steering input but as soon as I touch the brakes it goes away until I let up on the brake then it returns. Very intermittent issue, so going to the dealer at this point will result in a 'no problem found' as you know it won't happen when they are checking it out.

It kind of sounds like driving on the rumble strip on the edge of the freeway but not that loud or that much vibration.

It's on the passenger side, but can't tell yet if it is front or back yet.

Anyone have any ideas?
 

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Update: Noise is getting a little louder and happening more often. Seems like you have to be on the road for 10-15 mins before you hear anything. Seems to come from the passenger front and steering input does change it a little, but if you just lightly touch the brake, it goes away until you let up on the brake, then it's back. Still too intermittent to take it in to the dealer.

Can't believe there are only two of us having this issue. Anyone?
 

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Update: Noise is getting a little louder and happening more often. Seems like you have to be on the road for 10-15 mins before you hear anything. Seems to come from the passenger front and steering input does change it a little, but if you just lightly touch the brake, it goes away until you let up on the brake, then it's back. Still too intermittent to take it in to the dealer.

Can't believe there are only two of us having this issue. Anyone?
If you're able, I would recommend a ride along with your dealership. That way you can make sure the conditions are met and that someone is experiencing the sound/occurrence with you.

Kori
Jeep Social Care Specialist
 

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I've had this issue with my 2012 and I couldn't figure it out for the longest time... but it's your heat shields around your front brake calipers. They get warped from the heat, which explains why it only happens after driving for a bit. You can bend them back with a screwdriver with the wheels still on, or take the front wheels off to get even better access. I have to bend mine back like once a year. Hope this helps!!
 

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I had the same issue with my 2014. It was caused by the brake pads touching the rotor as I was driving. Got worse when I turned the wheel to the left and went away when I turned right. I removed the brake pads and found allot of brake dust build up on the pads and in the center groove of the pads. I removed all the build up with flat screwdriver ,re-installed pads and all was good.
Before this I did go for a drive with service tech but he could not explain what it was.
 

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I have not taken mine in yet. It still makes the noise on occasion. Hope to find some time to look into the brake dust and heat shield ideas. It does sound brake related the more I listen to it. And, still just barely touching the brakes makes it go away. Not too serious of an issue I guess.
 

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Have not had time to take it apart. Being told that the groves in the pads are full of brake dust/glazed, etc. Have two more weeks of tax season to get past (70 hr weeks- no spare time), then I'll take it apart and see. I know my wear indicators are getting pretty close to the rotors, so I might just change the pads (21K miles) and see if it goes away. $200 for front pads yikes!
 

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I figured out the problem! It was coming from the breaks but also the rotors. Easy fix. Easy to swap as well. So I changed my breaks. Then cleaned the hell out of the back side of the rotors making sure there isn’t break dust. Also Grabbed a pick and cleaned and carved out the slots on the rotors, since they were filled. Quick 30 mins hopefully it helps
 

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Cleaned the pad groves and cleaned everything else up as well. Worked great for about 50 miles, now it's back. Pads are getting pretty thin, so going to replace them and see it that helps. Seems like it is the pad vibrating between the piston and the rotor in the very minute gap that is there.
 

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Changed pads tonight. So far so good. The inbound pads were really stuck in the caliper and were not quite as worn as the outbound pads. Not sure if that has anything to do with, well anything.

So, time will tell.
 
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