Ongoing 4x4 Drivetrain Issue – 2024 Tundra SR5 Long Box

Hi All

New member here and posting to see if anyone else is dealing with this…

I purchased a 2024 Tundra SR5 Double Cab Long Box in April 2024. Since new, the truck has had a drivetrain issue where it won’t reliably shift from 4x4 back to 2x4. The issue is repeatable with speeds around 80kph but will work intermittently at lower speeds. Pulling a trailer (less than 5000lbs) makes the issue much worse.

This makes highway driving in Canada very unsafe, as I can't just pull off the highway or stop to switch to 2x4 as I hit patches of good road then ice, without risking other motorists.

When in the 4x4 flashing light stage when it's stuck, all driver aides are disabled including cruise.

Over the past 15 months:

• It’s been in for service with reference to this issue 15+ times
• It’s received 2 new front differentials, a transfer case, and a 4x4 ECU (which was later removed)
• Logs have been submitted to Toyota TAS
• My new local dealer confirmed another identical Tundra on their lot has the exact same issue

I’ve just been told this is a known fault with no fix at this time.

I finally raised the issue with Toyota Canada and they have offered no resolution so far. I can’t safely drive it in winter or on gravel roads, and I’m stuck with a truck I can’t use or sell in good conscience.

Full video of the issue here:

https://youtu.be/1zLe_Kse5OE

Would love to hear if anyone else has run into this or found a workaround.

 

Sorry I cant help you but I always make it a point to come to a complete stop when going from two to four wheel drive or vice versa.
This comes from driving 4X4's before shifting on the fly was a thing.
Have you tried going back to the old way of doing things?
I'm really curious to see if it makes a difference.

 

Thanks Tundra Texan

Most vehicles I've driven "favour" forward momentum to shift 2x4 to 4x4. For example, if the shift doesn’t complete right away, gently rolling forward can help “complete” the engagement or disengagement but, the Gen 3 Tundra "can" shift while stationary. But this doesn't help me - I need the ability to shift on the fly and one of the main deciding purchasing features I've had since I started buying trucks many moons ago

I've driven over a hundred trucks I bet and not one has had this issue. Even other Gen 3 Tundras.

In the manual it says you can shift below 100 km/h.

Shifting from “2H” to “4H”

1 Reduce vehicle speed to less

than 62 mph (100 km/h).

2 Push and shift the front-

wheel drive control switch to

“4H”.

The “4H” indicator will come on.

■ Shifting from “4H” to “2H”

1 Reduce vehicle speed to less

than 62 mph (100 km/h).

2 Push and shift the front-

wheel drive control switch to

“2H”.

The “4H” indicator will go off.