2016 High Altitude LOUD over 35mph - Jeep Patriot Forums
Engine and Drivetrain Engines, transfer cases, transmissions and axles

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post #1 of 11 (permalink) Old 06-23-2019, 06:48 PM Thread Starter
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2016 High Altitude LOUD over 35mph

Does anyone know why the 2016 H/A is loud inside? It seems like the noise is coming from the rear. Not locked in 4wd. Shifts and accelerates fine.... Just loud.
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post #2 of 11 (permalink) Old 06-23-2019, 06:58 PM
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What kind of loud? Road noise? Air whistling? Mechanical noise? Exhaust? Could be any number of things. My 2014 Sport has always been a bit loud inside due to wind noise, and it now also gets some road noise inside due to my AT tires.

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post #3 of 11 (permalink) Old 06-23-2019, 07:10 PM Thread Starter
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Not wind or road noise..... Sounds like it is coming from the rear differential.
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post #4 of 11 (permalink) Old 06-23-2019, 08:00 PM

 
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If it's a loud rumble it could be a bad rear wheel hub, sometimes when they get really bad they grab on tight turns which can cause tire chirp.

The diff could be low on fluid, or maybe a bad half shaft.

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post #5 of 11 (permalink) Old 06-23-2019, 09:07 PM Thread Starter
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Just a real loud but deep hum. Handles great, accelerates fine..... Guess I'll take it to a Jeep place and get it checked.
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post #6 of 11 (permalink) Old 06-23-2019, 10:20 PM
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Will the sound go away if you snap off the ESC? Or if you move autostick to manual mode? I have a 2018 Compass that makes a grumbling noise around 35MPH like you describe -- it sounds sorta like snow tires or A/T tires, in fact I don't even notice the noise with snow tires on. In my case its the AWD being kept up to speed with the rest of the drivetrain in order to be ready to engage should it be needed.
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post #7 of 11 (permalink) Old 06-23-2019, 10:55 PM Thread Starter
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It does sound kinda like I have mud tires on it.... I still have "touring" treads so it shouldn't be the tires making that noise. I'll try turning of the esc and shifting manually tomorrow.
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post #8 of 11 (permalink) Old 06-24-2019, 07:34 AM
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Of course the drivetrain in 2nd generation Compass is different from the Patriot, but if the grumbling noise stops when you turn off the ESC then its a clue that it is the sound of the vehicle functioning normally. In my case if I'm driving at speed and turn off the ESC or switch to manual shifting I can hear the sound of the RPMs dropping away. I figure the ESC is a safety device so I leave it on -- it could save my neck though I hope I never need it.
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post #9 of 11 (permalink) Old 06-24-2019, 11:15 AM
 
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Firs step I would do, do a visual inspection, and then rotate the tires. I would look for cupping on the inside edge.
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post #10 of 11 (permalink) Old 06-24-2019, 09:13 PM Thread Starter
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Tried the esc and manual shift.... No change. Tires are new. Weird analogy...... Let's say you were driving a manual truck and had it in 5th gear and you just take your foot off the gas. The winding down noise you would make before you engage the clutch.... That's what it sounds like but a constant steady hum. Like I said before, it shifts fine...... Actually better than any automatic I've ever owned.....And the noise is coming from the rear. No leaks or anything broke from visual inspection.
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post #11 of 11 (permalink) Old 06-25-2019, 05:22 PM
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Have the wheel bearings, rear axle and differential checked. Without a warning light it will only get diagnosed through a manual inspection by a mechanic. If it only happens on certain roads it is the tires. My all terrains are really quiet but will whine loud on roads with those vertical lines running through the asphalt. The tires will also handle really sloppy on those roads due to the thread chunks being less stable than a solid street tire.
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