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Old 11-22-2021, 09:07 PM #106
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Hey Guys,

I made a post about this. My sound is weird. It occurs only at 2-3k rpm. And about 30 mph. It only occurs when there's load. On stilts, nothing.

Here was the post, video links below:

Here's an update to anyone lurking. Again 2014 4x4, you may experience something similar down the line.

Clues:
1.) Only happens when coldish, first 10 mins of driving.
2.) Only can hear when radio is off.
3.) Power steering fluid has been low, and a week of low-ish transmission fluid that has been topped off properly.
4.) Mainly occurs in 2nd gear ~ 2000-3000 rpm.
5.) Sound in real life is more like a phaser effect. Kicks in inconsistently and sporadically. It's not "always there".


This one, sound starts at 8secs:
starts at 8secs - YouTube

https://www.youtube.com/watch?v=DDIi...SunnyD%27Light

at 4 and 7secs:
starts at 4s and 6s - YouTube

https://www.youtube.com/watch?v=gf0c...SunnyD%27Light

Thanks for anyone with thoughts!!


My hunch now is that it's either the power steering pump or transmission pump. I tried topping off power steering with lucas power steering leak stop to see if it does the trick. Ill post back again with updates.
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Old 11-28-2021, 10:59 PM #107
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Any updates on this?
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Old 12-01-2021, 08:02 PM #108
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mine just started out of no wheres ,2011 4 runner ,sounds like its super charged now ,, 100 k miles owned since new spending hours researching this and can find any concrete reason , driving me nuts it is , how does this whistling noise just start out of nowhere ???
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Old 12-01-2021, 09:21 PM #109
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Doing lots or research on the topic tells me itís the alternator. Engine Whine | Page 2 | Toyota FJ Cruiser Forum
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Old 12-18-2021, 11:50 AM #110
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Update , mine was the alternator, battery light came on a week later , changed out alternator and noise is gone , i would of bet the house that noise was not coming from alternator it blew my mind . Sounded internal from top of engine area
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Old 03-07-2023, 02:25 PM #111
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I stumbled on this thread to see if anyone else has had any luck with this. My wife took our 4Runner to the dealer today and they diagnosed it as the idler gear shaft and idler gear pulley that failed. My truck is still under the extended CPO warranty, but out of the standard CPO warranty so they have to check and see if they'll cover it.
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Old 03-14-2023, 07:38 PM #112
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Angry

My 14 limited with 160,000 miles on it and sounds just like this and dealer said transmission oil pump, cost $5,000+ to fix; which I do not have and itís not covered under Toyota as we purchased the vehicle from a local auto dealer. Iím to the point of trading it as Iím sick and tired of hearing this sound and itís getting worse louder while accelerating from 1st to 4th!


QUOTE=wfo9;2935218]My truck has a major whine under acceleration LOL. Joking, I know what that is.

Back to the OP...

From everything said so far (eliminating everything from the accessory side if the equation). That type of noise can be from a gear rotor pump. That leaves us with the oil pump and the transmission pump. My guess would be the transmission also. I doubt it is really indicative of a short term failure.

I'm still just guessing though based on the information presented here and not hearing it myself.

I doubt Toyota would change it out because of a noise though.

One question. Does the noise change at all with operating temps?[/QUOTE]
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Old 03-16-2023, 04:04 PM #113
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I'm getting the idler sprocket replaced under warranty and it's a helluva job. The dealer had to pull the engine to even get to the part and I'm going on day 5 with it in the shop. Thankfully, they gave me a Highlander Hybrid as a loaner, so I can at least get around even if it's not the most exciting vehicle in the world.
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Old 03-24-2023, 06:10 PM #114
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Whining noise

I was wondering about the same thing, I have a 2020 4Runner TRD Off Road and I noticed that noise right away, didn't think much of it since it was brand new. Thinking it's normal. The noise is still there now I'm at 20,000 miles.
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Old 11-17-2023, 09:50 PM #115
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Quote:
Originally Posted by SR5Bart View Post
@LaO_T4R I actually just did this under warranty for a customer at about 55k. It was a cam gear. Toyota had us replace basically everything behind the timing cover. it was something like $4500 all said and done. Customer left pretty happy.

He came in with the same concern about a whine at about 1500rpm and the noise was still there when we took the belt off to eliminate some things.

Hey, I just bought a new trd pro in May. The clock recently hit 9500 miles and this noise appeared out of nowhere. It is persistent. I put the car in neutral while coasting to a red light and revved the engine a little bit. The noise was profound. Do you know what it was that caused the noise?
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Old 11-20-2023, 03:48 PM #116
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2023 SR5 with 3200 miles, I also have the noise.


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Old 11-20-2023, 05:14 PM #117
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Quote:
Originally Posted by Team4runna View Post
Hey, I just bought a new trd pro in May. The clock recently hit 9500 miles and this noise appeared out of nowhere...
It's under warranty, take it to the dealer and let us know what they find & fix.
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Old 11-21-2023, 01:54 PM #118
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Just went to McGrath Toyota in Elmhurst. The master tech Vailious went for a ride with me. He recognized the whining noise was there. But that's about it. No fault codes etc. Basically, the technician doesn't know what's wrong.
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