Engine Whine

[jspiv]

Started about a month ago, engine whine. Not sure where it's coming from.
Seems to correlate with the RPMs, not with speed, or anything else that I can determine.
Might be coming from the back part of the engine? At least it's more discernable from the rear and in the cab.
Check it out and see what you think.

YouTube

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[jspiv]

Somebody suggested that it could be low transmission fluid, but I just checked that and everything looks good.

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[Nate_GB]

Started about a month ago, engine whine. Not sure where it's coming from.
Seems to correlate with the RPMs, not with speed, or anything else that I can determine.
Might be coming from the back part of the engine? At least it's more discernable from the rear and in the cab.
Check it out and see what you think.

YouTube

Sent from my Pixel 2 using Tapatalk

It does it if the car is sitting in park and someone is revving it?

 

[Novashards]

Mine turned out to be a bad fan bracket bearing and a bad timing belt tensioner pulley bearing.

 

[jspiv]

Okay well troubleshooting it I found out some new things.
It only does it in drive gears. Not happening in Park or neutral.
Transmission fluid is within normal levels while cold, but low when at operating temps. The whine happens at cold and operating temps.

 

[19963.4lsr5]

Okay well troubleshooting it I found out some new things.

It only does it in drive gears. Not happening in Park or neutral.

Transmission fluid is within normal levels while cold, but low when at operating temps. The whine happens at cold and operating temps.

Getting your trans fluid level correct hot is a good place to start. Every time I’ve drained the atf I always got a gallon. So I don’t even bother using the stupid dip stick.

My noise was a bad Diode in the Alt. It was always there but under load (like headlights) it got real loud.


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[bwarren]

I had a similar issue and it ended up being my fan clutch.

 

[jspiv]

Update:
After adding, checking, adding, checking again. Still whining. Took it to the local shop and they basically said everything looks good, and unless they tear it down and look into it more.

So I guess I'm driving it until it starts having problems shifting etc.

 

[thegipper]

Have you ever dropped your tranny pan and checked the filter? I had a whine from my tranny on cold starts that was from the tranny pump because the filter was plugged up. It was basically starving the pump of fluid on cold start ups which is why it would whine. My whine would go away though after the truck warmed up for a bit. Once I replaced the filter, the whine was completely gone.

It's pretty easy to drop the pan and if you have never replaced that filter, it may be worth a couple hours of your time. The part is pretty cheap too if I remember correctly.

Or, it could be something else completely unrelated. Tracking down noises can really be a PITA sometimes.

 

[mtbtim]

Update:
After adding, checking, adding, checking again. Still whining. Took it to the local shop and they basically said everything looks good, and unless they tear it down and look into it more.

So I guess I'm driving it until it starts having problems shifting etc.

I don't assume anything anymore so don't be offended when I ask this. Are you checking the transmission fluid while the engine is running, in park and you're on level ground? Your best bet to get an accurate level reading is by monitoring your trans temp. Normal operating temp for our transmissions is 158-176 according to the FSM. When I dial in my level after a fluid change, I take my rig for a drive around 5 miles out and 5 miles back on the freeway to get the temperature up. To finish getting my trans to the top end of the normal operating range, I put my rig in drive, parking brake on, left foot on the service brake and right foot on the accelerator. I get my rpms to around 1000 or a little higher and I hold it there until my trans temp hits around 180. Then I put the trans back in park, keep the engine running and immediately check the level with the dipstick. If I'm not at the top hot mark on the dipstick, I add some until it is. Since ATF expands as it gets hotter, you would actually see the level on your dipstick over the top hot mark if you checked it after climbing a grade and your temp was much higher than 176 degrees.

I think it's ok for these transmissions to be a little under filled and a little overfilled. You just don't want to be way under filled or way overfilled.

If you level is good, I'd do what the [MENTION=138943]thegipper[/MENTION] suggested and drop the pan to check the filter. ATF gets thinner as it heats up and your trans might be starved of fluid when it's fluid is cold and thicker.

Here's a video you can use:

<iframe width="560" height="315" src="https://www.youtube.com/embed/tuGazNhuEtM" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

 

[S1996R]

Mine was a fan clutch also. Mine started to wine about 1 min after cold start up. I found that after warming up the engine, I shut the engine off i quickly grabbed the fan and gave it a spin. It sounded like a dry bearing. I would prop the hood before doing this as I have found waiting those couple seconds would lock the fan clutch to the point of being very difficult to turn.