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Old 04-06-2013, 09:53 PM   #1
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Whining noise when accelerationg 3.6 why?

I have road tested several 2013s and have noticed including mine that when cold and starting off under acceleration there is a whining sound which increases with RPM and then goes away as the auto trans shifts into a higher gears.
I have also read that all v6s have somewhat of a whining sound, does anybody know what causes that noise? It almost sounds like a old sewing machine.

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Old 04-06-2013, 11:14 PM   #2
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Unfortunately it's normal. Mine also sounds tiny and whiney when cold as the rpm increases.
I really miss the deep rumble of some of the old v8 engines.
I may install a mega exhaust system to get some low frequency rumble out of it.

Now to your question as to what causes that high pitch whine, I really don't know. I don't think that there is anybody smart enough on this Forum to give you a answer as to why!

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Old 04-07-2013, 10:07 AM   #3
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Where are all of our engine Guru's?
Have you not ever questioned as to why the V6 engines have a whining sound to them and the V8s don't???
I need your knowledgeable opinions as to why PLEASE.............
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Old 04-07-2013, 11:27 AM   #4
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Quote:
Originally Posted by Old Dogger View Post
Unfortunately it's normal. Mine also sounds tiny and whiney when cold as the rpm increases.
I really miss the deep rumble of some of the old v8 engines.
I may install a mega exhaust system to get some low frequency rumble out of it.

Now to your question as to what causes that high pitch whine, I really don't know. I don't think that there is anybody smart enough on this Forum to give you a answer as to why!

I won't even attempt to answer because: I'm not smart enough and I don't have the automatic.
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Old 04-07-2013, 11:28 AM   #5
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Hello.......... can anybody answer my question, is this whine on the 3.6 normal?
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Old 04-07-2013, 12:03 PM   #6
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Yes it is normal. I hate it. At first I thought something was wrong but it's just the way it is. Annoying as hell.
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Old 04-07-2013, 12:18 PM   #7
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Yes it is normal. I hate it. At first I thought something was wrong but it's just the way it is. Annoying as hell.
Thank you for your reply! I guess that nothing is perfect in this world. I will have to say that everything else on these new Wranglers are awesome!
I had some whine from my 2003 4.0, but there is definitely more with the 3.6 and 5 speed. I road tested about 6 of them before buying mine and they all had it. I'm thinking that it originates from the engine rather than the transmission. It may have something to do with the roller cams along with internal engine chains, being used on the valve Trane.
It will be interesting to see what the life expectancy of the 3.6 is verses the old reliable 4.0.
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Old 04-07-2013, 01:34 PM   #8
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I don't have a whining noise in my '12 JK Auto, then again I always let the motor warm up before driving.
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Old 04-07-2013, 02:08 PM   #9
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I don't have a whining noise in my '12 JK Auto, then again I always let the motor warm up before driving.
I let my engine warm up until the high idle starts to slow down. My description of a whine may not totally fit as to what I am hearing. It's more like a whiney roar as the engine RPM increases and then the transmission shifts. I hear it more in the lower gears. Its only on take off when accelerating. The noise is non-existing when driving at any steady speeds. Mine has always sounded this way from day one. I only have about 900 miles on it. I have also heard this on others that I have road tested. It may just be the power train noise that I am hearing. Everything is very smooth with no vibration.
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Old 04-07-2013, 03:47 PM   #10
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On mine it's the Mercedes NAG1 / WA580 / W5A580 automatic transmission that wines........> Mercedes NAG1 / WA580 automatic transmission for Dodge, Jeep, and Chrysler
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Old 04-07-2013, 04:10 PM   #11
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On mine it's the Mercedes NAG1 / WA580 / W5A580 automatic transmission that wines........> Mercedes NAG1 / WA580 automatic transmission for Dodge, Jeep, and Chrysler
Thank you! That is great INFO and a very nice demonstration video! Maybe this is what I am hearing?

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