2024 Sequoia

Hey Guys
I am asking here because the chance something like this may happen to a Tundra is higher due to a higher volume sold

2024 Sequoia with barely 5000 miles on it I was driving over the Independence Pass yesterday's and after I got down in Aspen, it refused to upshift pass 7 gear

I let it stay over night and in the morning was everything just fine.
I took it again over the Pass today and the same issue.
I am in Salida Co about 2000 miles from home and not ready to drive this thing back home like this.
My question is, anyone encounter this issue with his Tundra or have any idea what could be wrong ?
I am planning to drive to a dealer tomorrow but is the fear that I could be stuck without a truck in my only 10 days vacation that’s making me nervous
Thank you for any assistance

 

Were you accidentally in Tow Mode? Looks like it on your dash. It locks out the overdrive gears 8 thru 10.

 

^^^ This! Exactly what I thought.

 

Nope. I tried that as well. I toggle between sport, normal and eco as well.
I have the tow gauge showing because I like to keep and eye on the fluids
Is changing the gears as it would tow (keeps higher rpm) up to seven but if I take the foot off, it abruptly slow down and drops a gear
Doesn’t go to eight gear at all
Thank you for the input

 

Sure sounds like tow mode. Downshift engine braking too. Do you have a trailer plug inserted for some reason? Not sure how that digital display works but maybe it somehow initiates tow mode with that towing display? Try another? For giggles I would try disconnecting the battery (one lead) for a minute and see if it resets something. (don’t know if that resets all the settings in the infotainment system)

 

Nothing connected to the tow hitch
I am thinking of an oxygen sensor or something like that given that it happen at higher altitude both times.

 

Tuner been used

 

No
Is designated long trips car

 

So in lower altitude it was going into overdrive gears 8-10 just fine? Very interesting. May even be temperature related as overdrive causes more heat. Please come back to share dealers reply. I’m very interested to hear. Thx

 

At lower altitudes was going fine thru all gears. To be honest the 10 th gear is going only if I go faster than 80 mph otherwise I never see it
9 th gear/70 mph is where I spend most of the times.
After the Pass incident is not going anywhere past 7th.
I am hoping to see a dealer tomorrow somewhere in west Colorado , Durango and see what they are saying.

 

I think it's one of two things:

1. Displaying your tow settings locks out the overdrive gears as if you're towing even though you didn't select tow/haul mode.

One thing to check: if you display tow settings while at lower altitudes, does it still lock out overdrive gears?

2. The computer on your excessively heavy hybrid SUV is monitoring air density, and when the air gets thin at higher altitudes, it automatically locks out overdrive gears to prevent lugging and to incentivize torque converter lockup in order to keep transmission temps from running away.

 

1- I did not try to change the gauge I will change and see if this could trigger the behavior even though this should not happen without me put it on tow mode.
2- That is a definite possibility even though I am not that loaded. Three persons and about 100 lbs of gear.

Yesterday on my from Salida to Gunnison I went over Monarch Pass and by luck another 2024 Sequía with a camper passed me on the straight. I catch up with him at the gas station in Gunnison and he did not have this issue even towing
That may confirm that something else is happening
Thank you for the input

 

A little update guys
Stopped in Durango and the dealer could not take me in to see what is wrong with the transmission. They said that they are extremely busy and I understand I decided to take the small roads and make it back home but
I fear that the truck may let me down somewhere and I decide to send it back on a platform and flew back east. At this time the truck is sitting in a yard in Topeka waiting for a hot shot to get it back east where I can have the local dealer look at.

22 Tundra that I am afraid to take in long trips and a 24 Sequoia that let me down on a long trip

Fell sooooo stupid for trusting Toyota again.

 

Thanks for the update. Look forward to hearing more details when you get them. Good Luck.

 

Off the trailer and the mechanic confirmed the issue. They reboot everything and is back to normal. Beside ambient temperature sensor glitch, no one can really explain.

 

Not related to your issue, but you mentioned being in the towing screen to watch the gauges. I thought with the digital MID, you can customize that right display to always show that.
https://www.youtube.com/watch?v=v-8JSpLuOT4&t=1s

 

Yes you can This is a pic how is on the Tundra as I drive it right now.

 

Just re-read you were in the Durango area, over to Independence Pass, which currently sits at 12,095ft at the highest.
Even Durango (6,500ft +) near where the ski resorts are, you are about almost 9000ft (Purgatory Resort base is around 8700ft, top summit 10,800ft)
I was driving the then-new gen 4R rental, was not amused about the power output but didn't think it had a turbo, just NA.
I have not driven a 3rd gen, so I might be wrong, but turbo tend to run very lean when you are higher up, especially if Independence pass is anywhere from 10,000ft and higher, thinner air is not going to help much when the turbo is trying to suck the air for breath. It's a beautiful place, but I think I will go and buy a used last gen Seq, which is my plan anyway, those are basically Tundra SUV.....lol

 

Could it have anything to do with cruise control. On your dash you have cruise control on and set to 58 mph. I bet the engine chose 7 to keep the speed going up and probably 7 to keep the same speed going down. With no strain on the engine on flat ground I would bet your gears would of shifted back to 8 or 9 at that speed

 

Cruise or not, high altitude or lower, did not want to go on higher gear.
I am glad is all back to normal now.

I had a 20 Sequoia and did the same pass in 21 I have to be honest the 8 cylinder did just fine but it had to scream and the gas was pretty bad compared to the turbo

These new turbo just pull and pull effortlessly compared to the v8.
With the same tires size and same load, 50 lbs more or less , the 8 cylinder got an average 13 mpg where the turbo 17 mpg an average. In my eyes the New Sequoia besides the third row arrangement, is superior to the older gen.

 

I have the complete opposite perspective. Your 2020 would have kept screaming at higher rpm well into the 200k-300k mile range. The turbo gives the perception of effortless torque but it is in fact much harder on itself in order to provide that perception. They also need more repairs over time and, current recall issues aside, they generally do not last over the long term like a tried and true v8.

Your difference of 4mpg is pretty close to the ~3mpg average difference between the 3UR and V35A on Fuelly.com. If one is purchasing for the long term, that juice is not worth the squeeze IMO.

To me, the no nonsense longevity of NA v8s is why they are still offered as the default engine option in HD trucks, despite the fact that TTv6s provide more pulling torque at lower RPMs.

We’re all watching how Toyota handles this engine issue. If they can in fact build a TTv6 that goes and goes and goes into the 500k mile range and beyond on just routine maintenance the same way there are lots of examples of the 3UR doing, I’ll replace our LX with a new Sequoia. There are a couple examples at this point of the V35A with 100k+. We’ll see as data piles up over time…

 

I would amend this to say a NA engine. Everyone is so hung up on the V8 vs. V6 issue. I get it, it's a truck forum. But enough derailing.

 

Main topic was resolved. My post you quoted was a direct response to the post I quoted. Every thread on this forum wanders off and on topic.

 

It is really frustrating when a car gives you issues, regardless of the make, but I still have high hopes that Toyota will put their unresolved issues behind.
Opinions vary and that is what makes this forum great.
Like he said Truck fixed and let’s hope for the best.