I was hoping some experienced folks out there could help me diagnose a problem and get some advice on working through my options with Chrysler.
I have a 2012 JKU Rubicon that I bought over the summer. From about 200 miles on, I started noticing a buzzing noise like a cross between a mosquito (pitch level) and a low level metal rub noise on a bench grinder making a new key. Here's the catch, its only makes the noise in 3rd or 4th gear at exactly 1400 RPM's typically between the speed range of 33-37mph under load of the gas pedal predominately when going up an increase in road grade. The RPM has to be exactly 1400. If you hold it at that RPM, the noise doesn't stop. The noise appears to be resonating from the passenger side rear of the motor going forward out of the front right side of the vehicle away from the driver position. I've had it in the dealer several times. After they couldn't figure it out, they scheduled the experienced Chrysler tech to look at it with me and kept it in the shop for 10 days. I was able to re-produce the noise with the tech and he was able to do it on his own. He was stumped after 10 days and couldn't figure out the problem. The dealer is no longer going to work on it because they claim they have exhausted all of their resources and there is nothing they can do at this point.
The response from Chrysler is now that it's a 'harmonic' noise caused by a combination of wheel package/gear ratio/motor/transmission for people with Max Tow package option on the Rubicon. The vehicle seems to run just fine and they will just have to wait until something just 'breaks'. Without knowing the actual problem, Chrysler is also claiming that its not a safety issue.
I love my Jeep and waited a long time to buy it. I've also been very patient with Chrysler and the dealer but at this point I'm incredible frustrated. I've been playing and building Jeeps for a long time so I'm just at the end of my rope.
If this is truly a problem with wheel, gear, max tow package which creates a resonated harmonic noise then wouldn't other people have it happening to their Jeeps too?
Anyone else hearing a similar noise or have a similar issue?
Does anyone know the options Chrysler has at their disposal to fix the situation before I shout the dreaded word, "Lemon" ?
PS: If there is any Audio experts out there... I recorded the noise with my iPhone from inside the cabin one day. Send me an email, I will send you an Audio version of the noise.