TSB: Hybrid Tacoma Now Included in Transmission Failure Issues & Replacement (October 2024)

[Ray T]

I was in the same boat as you I traded my 2011 rock warrior with 86k on it and it was in great condition

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[TacoFreak]

@Ray T Yeah - I had a 2011 Limited with some nice upgrades including the Off-Road package. Loved that truck but thought I should get something newer that I could count on. lol

Good luck pushing it with corporate. I talked to a brand engagement clown who did absolutely nothing for me. But you have a documented case now, so I hope they follow up with you. Since I have no current bad behavior my dealer can't make a report that would start a case and I am just stuck waiting.

 

[Ray T]

I get it I’m not just going to keep pushing for me I’m pushing for everyone and hopefully get results I’ll keep posting whatever transpires the wait and unknown feeling sure is a let down

 

[32spoke]

The issue involves casting sand remaining in the torque converter, apparently due to improper flushing. Given the pressures within the transmission and the size of the sand grains, it's unlikely the particles will settle; the filter may or may not capture all of them. However, the grains are large enough to lodge in the solenoids, leading to shifting problems. This may partially explain why not everyone is experiencing the exact same issue—some individuals report no problems, others experience intermittent issues, and some face complete transmission failure.

Every automotive hydraulic system in an automotive application, will have a pressure side and return side. Pressure is developed by a pump with spikes the pressure from nothing to a specified pressure by an engineered requirement. Creating the pressure creates heat and hydraulic force to address the requirements of the design of the system- this applies to all circulating fluid hydraulic systems. The transmission pump, behind the torque converter, generates the required pressures specified by an engineer. After the fluid passes though the transmission, or the demand side of the hydraulic system, this applies to air conditioning, hydraulic power steering, engine cooling system, and an automatic Transmission. After the fluid address the “demand” or hydraulic force demands, the fluid heats up and usually passes though a heat exchange unit- at this point, the pressure has already dropped, and in the case of an automatic transmission, by the time the fluid passes back into the transmission, after flowing though the heat
Exchanger, the fluid pressure will be much lower, reduced by 90%. The fluid is returned to the pan, a reservoir for the fluid to be pick up/suction to be recirculated into the transmission pump, which again,
Creates somewhere around 200-250psi. Therefore the 20-25 psi on the return side, as it flows into the expanse of the pan/reservoir, contaminants WILL collect in low flow areas within the low pressure area. Put your thumb over the end of a garden hose and spray, wait. To remove contaminants from the paint of a vehicle, the fastest way, not advised- the faster way to removed dirt and bird merde, pressure is utilized… in other words, respectfully, the pan will collect debris. And if the contamination is ferrous, it will also congregate around any magnetic source, where the hydraulic force is secondary to the electromagnetic force of the shift control solenoids

 

[hadelson]

Just read this and my Trailhunter is on the latest TSB. Owned just shy of two months with 1600 miles.

I am not going to worry about this. I do have Premium extended warranty so remain confident it will be replaced if the trans grenades.

Observations:

1. Really like the truck coming from a Tundra.
2. Since owning. When cold, does have occasional rough 1-2, 2-3 shift. It also shudders slightly below 35 MPH. This all goes away when trans temps reach +100 (I have a Scan Guage 3)
3. No codes yet, but I check weekly

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