67k miles, whine only when accelerating

She's at the dealership to have it replaced, still under warranty so I didn't put any wrenches to it.

on the bright side, they gave me a brand new tacoma trd offroad to play around in till my trucks done

 

My trucks at the dealership for the seal leak posted in the pictures above. They are aware of the whine via video I have and they will drive it obviously to hear it first hand. Sales manger said, no that's not normal he'll get service to look into that also. Trucks still under warranty.

to address your bullet points,

1st- I believe that's where its coming from, never tried the neutral part but my whine continues through 70+, start to hear it around the 30 mark under acceleration. Anything under 30 you just hear the mesh screen whistle and exhaust mostly. Which is normal so it doesn't bother me so bad to remove it.

2nd- My metal skid is missing a bolt in the front but I would be amazed on that being the issue. I don't put nothing pass noises though.

3rd- I tried a/c off and on, sound is still present.

 

At least you got them to a knowledge it and it’s under warranty that’s a win-win my friend.

 

Called the dealership around lunch today to see if they pulled my truck in yet. The seal coming out the transfer case is fixed (pictures above). I asked about the whine noise I was hearing during acceleration. He said, yea we heard it and have a whole new rear end on order , should be in on Monday.

So I would say at this moment this thread has been solved. And thankful I still have warranty lol.

2 weeks in a Tundra and I'm here for the good times ahead

 

Finally got my truck back from the dealership (2 week ordeal). Attached is the write up. Crazy it only has 67k and the rear diff kinda shit the bed. But I guess that's how things go sometimes and I'm lucky I only had the truck for 2 weeks. Definitely took advantage of the warranty.

Additional I asked the guy cause I was curious, what gear oil yall used for the transfer case, Toyota's liquid gold? He told me they didnt have to put any gear oil for the repair. Found it kinda strange, I figured they would have to open the transfer case to repair the seal but anyway. In my head I called bullshit and soon as I got the write up, it clearly states 80w90. Not a fan of it but I guess that's what that dealership uses.

Im assuming this would be a good time to change the front fluid since 2 outta 3 are freshly done? Plus I'm looking to do a trans D&F which i figured never been done by prev owner. 67k can't be to late to start that right?

Any other fluid changes I'm missing around this milage? Im honestly trying to minimize future repairs and have no problem forking the money for preventable maintenance.

 

Is the noise gone?

 

Yup, so for so good after an hour drive from there. All i hear now is the mesh screen whistle, which I'm ok with that.

Took the creeper under looks all good, no signs of leaky seals or gaskets. Will do a little better clean job on the areas ( still some grease from the old seal in areas)

 

Interesting. Mine is kinda like a rear end wine from the rear end when lightly on the throttle. I took it into the dealer like 60k miles ago when it was still under warranty and they replaced both rear wheel bearings or whatever there called. I told them before the repair its only when im on the gas noise goes away when I let off the gas "Wouldn't rear bearings make the noise all the time.. ". They said yep sounds like rear wheel bearings, and when I picked up the truck the noise was 100% the same. I just figured if something is wrong it would break and then maybe the dealer could figure it out...it's been a couple of years and around 60k miles so maybe it's normal.

 

Pretty much the same noise situation, only on acceleration, stops when I get off the gas.

I read other post saying they experienced the same never did anything about it and went 50k,60k,80k milles, no further issues other than the noise.

So it may or may not be a problem for you down the road. I just know the sound is not natural and wanted it fixed before it snowballed into another component.

Plus I only owned the truck for 2 weeks, so dam man that kinda rubbed me the wrong way after being pretty excited I finally found a tundra with the milage, condition, and pricing I was aiming for. The week before 3 sold out from under me so I moved quick on this one.

Also, it was real noticeable when I put the rear window down. I can only imagine what it sounded like to a person in their yard while I'm going down the highway

 

Yea well there's that too

 

Im glad they got it fixed for you so you can enjoy your truck.

 

Glad they got it figured out and repaired. My new-to-me ‘21 with similar mileage had/has the EXACT same issues. I had them service the differentials and t case before I took possession of it in January, but I noticed that the t case output seal was leaking shortly thereafter. And I had a whine that was present on acceleration, but went away if you let off the gas.

Dealership replaced the seal under warranty but said they couldn’t hear the whine. I took the service advisor for a ride along and he said he couldn’t distinguish it from the exhaust or road noise, even though it was quite obvious.

I took it to a differential shop since I already knew it was the rear end and it took them all of 20 seconds on the ride along to know it was pinion bearings and/or gears. When you accelerate, the gears shift just a bit and cause it whine; let off, and they shift back and the whine goes away. Hard engine braking with a trailer can cause a different noise.

Now I have to figure out how to convince the dealership to open their ears. I even called the warranty company to ask about having the work done at an independent shop and they said it MUST be performed at the dealership or it won’t be covered.

If it was just pinion bearings, I’d just have the diff shop fix it and have them install a limited slip while they are in there. But if it’s gears, AFAIK you can’t purchase OE 4.30 gears - you have to purchase the entire rear differential third member. Either that or go with aftermarket 4.88’s or 5.29’s, but since my truck is 4WD, I’d have to pay to have both axles regeared.

Glad your dealership took care of you!

 

Appreciate the info. Kinda new to all this and stated before, I'm not a mechanic nor pretend to be. So I'm soaking up this forum up like a sponge.

Mine was pretty faint sounding with windows up but soon as you put the rear window down it takes all of 2 seconds to hear that whine.

He did tell me my bearings were shot and when I went under the truck earlier with the creeper they replaced the whole front of the rear diff. Im guessing it comes all in assembly and can't repair whatever was messed up?

 

Yep. The front portion of the these differentials is called the carrier assembly or center section or third member or dropout center section. It’s the $2500 line item on your invoice. The entire headset and bearings are removed in one chunk and can be setup on the bench. The more common Salisbury type axle has a rear cover that is removed to access gears and bearings, which have to be setup in the vehicle. PITA.

From what I’m told, dealerships don’t do things like setup gears or rebuild motors; they simply replace parts - which isn’t always a bad thing. Whereas a differential shop will pull out the assembly, replace those bad bearings, and setup the gears so they mesh correctly without whining.

I was honestly surprised to see your truck has the EXACT same issues with virtually identical mileage (bought my truck at 62k miles and now it has 72k miles). Im glad they took care of you, though.

 

Again appreciate the knowledge, and hope all works out for you. Me personally I would keep pushing the issue. Considering you know exactly what the issue is, just gotta get them to bite and fix/replace the damn thing.

Hopefully whatever the prev owner did only affected the rear diff and the stress didnt transfer anywhere else I didnt see yet.

 

I am in the process of replacing the fluids on the transfer case, front differential, coolant flush and transmission drain/fill. (The rear diff fluid got changed when they replaced it)
That’s odd that they used 80W-90 but If you’re unhappy with it just get yourself some new fluid it’s super easy to change.
You can get all your fluids from Blauparts.com, they carry Ravenol which is a German brand and very high quality. You can also get transmission fluid from there however I suggest going with OEM Toyota WS transmission fluid for peace of mind.

 

Yea trans, coolant, and transfer I was going OEM fluids. Diffs I was going to do equivalent.

 

Not sure if you've checked out The Car Care Nut on YouTube, he’s a Toyota specialist and has a wealth of information on Toyotas, highly recommend his channel.

 

Indeed, guy knows his stuff. I watch him pretty regularly, just for the knowledge tbh. No intention to attempt half the shit he does but its all good stuff for sure.