Chasing down a mild squeal/whine
#1
JK Freak
Thread Starter
Chasing down a mild squeal/whine
So, did lots of trouble shooting and thread searching on various forums, and decided to post this up for input. Very strange... first off, 2014 JK Sahara with front and rear Detroit TT, Yukon 4.56 gears, all installed professionally over a year ago. Up to this point, no issues what so ever.
About 3 days ago, I noticed a squealing sound coming from what sounded like the front of the jeep. I wrote it off as random. But the more I drove the jeep, the more narrowed down I have it. It's very distinct and seems to be up front. It happens at 20 MPh and goes away at about 23 to 24 MPh. It seems to only happen when I accelerate from a stop. In other words, if I come to Highway speed and slow down to 20, no sound. Pressing the brakes and work the emergency brake have no effect. Acceleration or deceleration don't matter, just so long the speed is maintained. Swerving left to right doesn't change the sound. Shifting the transfer to 4H and back to 2H doesn't change it. No vibrations, and the jeep rides and tracks fine. All I found was the drivers side of the front axle seems to have a small leak around the C. Figure a seal gone or going out. The diff was a little low, so I topped it off. Took a ride after that, no change to the sound. WTF?????!!!!!!!! Help guys!!! It's totally random and rarely makes the sound. But, I know something isn't right.
About 3 days ago, I noticed a squealing sound coming from what sounded like the front of the jeep. I wrote it off as random. But the more I drove the jeep, the more narrowed down I have it. It's very distinct and seems to be up front. It happens at 20 MPh and goes away at about 23 to 24 MPh. It seems to only happen when I accelerate from a stop. In other words, if I come to Highway speed and slow down to 20, no sound. Pressing the brakes and work the emergency brake have no effect. Acceleration or deceleration don't matter, just so long the speed is maintained. Swerving left to right doesn't change the sound. Shifting the transfer to 4H and back to 2H doesn't change it. No vibrations, and the jeep rides and tracks fine. All I found was the drivers side of the front axle seems to have a small leak around the C. Figure a seal gone or going out. The diff was a little low, so I topped it off. Took a ride after that, no change to the sound. WTF?????!!!!!!!! Help guys!!! It's totally random and rarely makes the sound. But, I know something isn't right.
#4
Have you checked your driveshaft, also check your hub assembly's.
#5
JK Freak
Thread Starter
How would you suggest checking the driveshaft? I actually did the wheel hub check on the drivers side and forgot to check the damn passenger side. I'll do that tomorrow.
#6
JK Freak
Thread Starter
Update. Noticed this morning that if I pull up to a stop sign and turn left, when I strait end out and hit 20, the sound is there. On the other hand when I turn right, zero sound. This sound more like a wheel bearing now?
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#8
Edit: forgot to add, what your main concern should be is making sure there's there is no in/out or side/side play. If there is, it's a fair indication your pinion bearings are worn out, or that possibly your pinion nut is loose.
Last edited by Chuck-The-Ripper; 10-25-2016 at 03:53 AM.
#9
JK Freak
Thread Starter
Checked both driveshaft. They rotate around 1/4 to a 1/2 inch, so not much. There is zero in/out play on both. I also jacked my passenger side up and there is zero play in the hub. None of the driveshaft boots are torn or spitting grease. I'm at a loss... 😟
#10
JK Freak
Thread Starter
Yall gonna laugh at this one. The jeep is fine. Took it to the mechanic that did my gears and lockers. We rode around, it squealed and made a racket. Rolled the windows down, me in the passenger seat. I was like, hold it right there. Climbed out the window and sat on the door. Just as loud as hell, it was coming from the light bar. Sounded horrible, like steel on steel. Wtf???!!!!!! Hahahhahaha. Gave the light bar a slight rotation to change the air flow, noise gone. Had that light bar on there almost 2 years, never a peep. 😂