Whine At 40 mph and 80 mph????

I’ve noticed the last couple months a whine at 36-40 and 76-80. When pulling my trailer I don’t notice the same whine. So I put the truck in sport shift or whatever you call it and bumped it down one gear raising rpm and the noise went away. I’m not sure if it’s the transmission or differential at this point but leaning towards transmission.

 

Yep, I see the same thing on mine. sounds like rear end but it is really hard to tell

 

Has anyone else noticed this noise?

 

I have it at 78mph and above. When I let off the gas it goes away. I think it is rear end.

 

Same here...

Here's a thread for this issue: https://www.tundras.com/threads/whistle-above-65-mph-not-wind-noise.125509/

 

Is your wife in the passenger seat?





Ill see myself out...

 

I think I found a way to replicate this issue easily for the dealership seerice to see it.

Put your truck in neutral, open rear window, and rev engine to 2k rpm - I hear exactly same whine noise as I hear driving 80mph on the freeway.

Techy friends, help me figure this out -

Truck is parked
Transmission in neutral
I press gas pedal to get to 2k-3k rpm

And I hear distinct whining sound from the rear window.

What part could be causing this noise?

 

I took my 2022 SR5 into the dealer with ~33k miles on it because I've been more and more aware of a similar whine from the rear end that everyone has described here. For me it was most noticeable at 55 mph and 80-85 mph. Occasionally I open the rear window and that is when it became most noticeable and obviously coming from the rear end of the truck. I honestly waited on taking it in for at least a year because I thought I was being too picky or making it a bigger deal that it really is. Service tech took it for a drive and quickly agreed that it shouldn't be doing that, so they're ordering me a new differential. They hope to have it back to me tomorrow, so I can't wait to hear out it sounds with the new differential installed.

 

keep us posted!

 

Got my truck back today with the new differential. I'll attach some pictures from the paperwork, but tech states they found "excessive metal particulates and some shavings on the drain plug and fluid has a silvery film", which is obviously not good. Drove home on the interstate, no noise wine/hum/wooooo from the back end at all. It is actually kind of weird, I was so used to it the cabin sounds really quiet now (other than all that pesky wind noise from the passenger side).
My Tundra is really a pavement pounder, I tow a jet ski (less than 800lbs total) a few times a year but that is it, so I'm really surprised to have a bad differential at 33k miles.

 

Congrats!
How long did it take them from first day diagnostics to let you know they're ordering new differential?
Did they say they have to get it approved by Toyota Corp first?

 

They started looking at in Monday morning first thing, they let me know I needed the differential Monday night. I was told they ordered the differential Monday night and it showed up mid-afternoon on Tuesday. I got a call that it was ready to pick up on Tuesday night at the very end of the day. I picked it up Wednesday mid-day. They didn't mention anything about needing approval from anyone else to get moving.

 

Wow... I'm just going to drive to your dealership however long it may take me

 

Hendricks Toyota, Merriam, KS (near Kansas City), I would highly recommend!

 

2025 Limited, with the TRD off-road package in about 5,000 Miles.

Just started noticing this exact thing around the exact speeds notated.

Sounds like we're not sure it's the differential though, if it was that simple wouldn't the fix be solving the issue across the board for people.

Going to mention it to my dealer but can't say I have much faith, they never seem to be able to resolve anything I ask them about, and always default to cannot duplicate.

Is some metal in the fluid normal during diff break in? That's why you change it....I get chunks not being normal.

If it's really diff, why would it not resolve the issue for everyone? makes me wonder if this is just a "normal" noise for this vehicle.

 

Isn't some metal in diff fluid normal as it breaks on? I guess they'd be able to tell if it's excessive?

The noise for me sometimes can be difficult to duplicate but once I have it, I have it. My dealer is notorious for telling me they can't duplicate things I'm hearing so I'm in a similar boat as you were where I'm not even sure how to approach it with them.