Horrible noise when vehicle is stopped

[WV_LC250]

Following.

 

[juuuiiiice]

Some big news....

I was at the dealership the other day and they told me that they had been contacted by Toyota corporate to STOP working on my LC. Apparently, Toyota has a new plan. They have been working with the transmission manufacturer and have developed a re-engineered pump for the transmission. They are sending one of the new pumps to my dealership as we speak.

The new plan is to replace only the pump. The dealership has confirmed that they have a spare transmission, torque converter, and hybrid power module on hand. These will be replaced only if there is evidence of damage. I asked if they would just replace everything to be safe but they told me that they have to follow Toyota's instructions since all the work is covered under the warranty. If there is any apparent damage to any of those parts, then the repair will be paused so that the Toyota Field Engineer can do an inspection before they are replaced.

I'm not an engineer, but it seems to me that if they went to the trouble of re-engineering the pump that there must be a defect in the original design. That would argue that what has happened to me is a more wide spread issue than any of us would like to imagine. Hopefully I'm wrong.

The new part should be at the dealership by Tuesday December 23rd. More to come after the repairs are made.

 

[katekebo]

Some big news....

I was at the dealership the other day and they told me that they had been contacted by Toyota corporate to STOP working on my LC. Apparently, Toyota has a new plan. They have been working with the transmission manufacturer and have developed a re-engineered pump for the transmission. They are sending one of the new pumps to my dealership as we speak.

The new plan is to replace only the pump. The dealership has confirmed that they have a spare transmission, torque converter, and hybrid power module on hand. These will be replaced only if there is evidence of damage. I asked if they would just replace everything to be safe but they told me that they have to follow Toyota's instructions since all the work is covered under the warranty. If there is any apparent damage to any of those parts, then the repair will be paused so that the Toyota Field Engineer can do an inspection before they are replaced.

I'm not an engineer, but it seems to me that if they went to the trouble of re-engineering the pump that there must be a defect in the original design. That would argue that what has happened to me is a more wide spread issue than any of us would like to imagine. Hopefully I'm wrong.

The new part should be at the dealership by Tuesday December 23rd. More to come after the repairs are made.

Thanks for sharing. Makes sense.
I have checked Toyota parts website and the pump is still listed with the old part number (35300-04010). If a new pump has been developed, Toyota will update the part number (last 6 digits) and it will say that the old part has been superseded. This may take a few months, though.

 

[juuuiiiice]

Thanks for sharing. Makes sense.
I have checked Toyota parts website and the pump is still listed with the old part number (35300-04010). If a new pump has been developed, Toyota will update the part number (last 6 digits) and it will say that the old part has been superseded. This may take a few months, though.

This is consistent with what the dealership told me. They said the part was so new it didn’t even have a formal Toyota part number yet.

 

[Chris_lc]

Some big news....

I was at the dealership the other day and they told me that they had been contacted by Toyota corporate to STOP working on my LC. Apparently, Toyota has a new plan. They have been working with the transmission manufacturer and have developed a re-engineered pump for the transmission. They are sending one of the new pumps to my dealership as we speak.

The new plan is to replace only the pump. The dealership has confirmed that they have a spare transmission, torque converter, and hybrid power module on hand. These will be replaced only if there is evidence of damage. I asked if they would just replace everything to be safe but they told me that they have to follow Toyota's instructions since all the work is covered under the warranty. If there is any apparent damage to any of those parts, then the repair will be paused so that the Toyota Field Engineer can do an inspection before they are replaced.

I'm not an engineer, but it seems to me that if they went to the trouble of re-engineering the pump that there must be a defect in the original design. That would argue that what has happened to me is a more wide spread issue than any of us would like to imagine. Hopefully I'm wrong.

The new part should be at the dealership by Tuesday December 23rd. More to come after the repairs are made.

Great news! they’ll have the parts readily available soon. Or maybe issue a recall !

Assuming the new part is available at the Dealerships and no damage to Torque converter and hybrid.. Any insights on the typical time required and ease for technician changing the pump parts in comparison to the whole transmission, torque converter and hybrid assembly ? Just curious

 

[katekebo]

Great news! they’ll have the parts readily available soon. Or maybe issue a recall !

Assuming the new part is available at the Dealerships and no damage to Torque converter and hybrid.. Any insights on the typical time required and ease for technician changing the pump parts in comparison to the whole transmission, torque converter and hybrid assembly ? Just curious

Toyota won't issue a recall because it's not a safety problem. Most likely it will just be a TSB instructing techs how to diagnose and replace the pump, stating that it's covered under powertrain 5 yrs / 60k miles warranty.
The pump MSRP is ~$1,300, and in order to replace it you only need to drop the transmission pan, and then refill the transmission. Probably 2-3 hrs..

 

[juuuiiiice]

Toyota won't issue a recall because it's not a safety problem. Most likely it will just be a TSB instructing techs how to diagnose and replace the pump, stating that it's covered under powertrain 5 yrs / 60k miles warranty.
The pump MSRP is ~$1,300, and in order to replace it you only need to drop the transmission pan, and then refill the transmission. Probably 2-3 hrs..

That’s consistent with what the dealer told me. When they drop the pan they’ll inspect the transmission fluid for metal flakes or shavings. If any are noted, then the vehicle gets a new transmission too.

I’m not sure how they decide when to replace the torque converter or the hybrid power unit.

@Chris_lc They told me that regardless of whether it’s just the pump or all the pieces, it can be done in one day.

 

[katekebo]

That’s consistent with what the dealer told me. When they drop the pan they’ll inspect the transmission fluid for metal flakes or shavings. If any are noted, then the vehicle gets a new transmission too.

I’m not sure how they decide when to replace the torque converter or the hybrid power unit.

@Chris_lc They told me that regardless of whether it’s just the pump or all the pieces, it can be done in one day.

If they find metal particles they will replace everything - transmission, torque converter and hybrid unit - because all three share fluid. If there is contamination in the transmission pan, it's everywhere.

 

[ultane]

Well this news is music to my ears, and I can see the day when I can clutch my worry beads a little less loosely.

 

[katekebo]

Well this news is music to my ears, and I can see the day when I can clutch my worry beads a little less loosely.

Not really. All it means is that:

• the pump is defective
• those whose transmission fails once the warranty expires will get shafted with the cost of the replacement.

Just like those with defective UA80 transmissions, hundreds of them failing between 50 and 100k miles, Toyota says "not my problem".

https://www.toyotanation.com/threads/official-2017-2019-ua80-transmission-whine-failure-thread.1778733/#replies

 

[ultane]

Not really. All it means is that:

• the pump is defective
• those whose transmission fails once the warranty expires will get shafted with the cost of the replacement.

Just like those with defective UA80 transmissions, hundreds of them failing between 50 and 100k miles, Toyota says "not my problem".

https://www.toyotanation.com/threads/official-2017-2019-ua80-transmission-whine-failure-thread.1778733/#replies

Maybe if we all complain to the NTSB, it could be bumped up to a recall for safety reasons.

 

[WookieBait]

Toyota won't issue a recall because it's not a safety problem. Most likely it will just be a TSB instructing techs how to diagnose and replace the pump, stating that it's covered under powertrain 5 yrs / 60k miles warranty.
The pump MSRP is ~$1,300, and in order to replace it you only need to drop the transmission pan, and then refill the transmission. Probably 2-3 hrs..

It can and is a safety problem imo. If it fails and leaves you stranded in the middle of the road.

 

[D-Train]

Not really. All it means is that:

• the pump is defective
• those whose transmission fails once the warranty expires will get shafted with the cost of the replacement.

Just like those with defective UA80 transmissions, hundreds of them failing between 50 and 100k miles, Toyota says "not my problem".

https://www.toyotanation.com/threads/official-2017-2019-ua80-transmission-whine-failure-thread.1778733/#replies

This makes me want to drive my LC more... fail faster IMHO, then new pump and/or tranny under warranty.

The re-designed part on a brand new transmission is an admission that it is, in fact, their problem. Class action lawsuit me thinks if it doesn't get addressed properly and everyone is driving a tranny waiting to explode.

 

[katekebo]

This makes me want to drive my LC more... fail faster IMHO, then new pump and/or tranny under warranty.

The re-designed part on a brand new transmission is an admission that it is, in fact, their problem. Class action lawsuit me thinks if it doesn't get addressed properly and everyone is driving a tranny waiting to explode.

There are already two class action lawsuit re. UA80 transmisison. But of course Toyota is fighting them. If you think how expensive a potential remedy is, it pays a lot of lawyers.

 

[jambo]

TL;DR - Horrible noise when the vehicle is in gear and at a complete stop. About 14,000 mi on the odometer. No prior warning. Other posts on this forum suggest this is likely the electric pump inside the transmission. Dealer confirmed this is the problem. Waiting on parts now. More to come.

View attachment 52162

Similar threads here and here.

Last night after sitting idle waiting in the parking lot, my vehicle started making "the noise." No warning lights on the dash, no unusual handling from the vehicle only a horrible screeching noise whenever the vehicle came to a full stop. The noise would go way if I shifted the vehicle into neutral or started moving again. I took the vehicle for spin around the block to see if it would go way and also noticed that the oil pressure was going up and down fairly rapidly. I drove the vehicle home and parked it overnight in my garage.

This morning, I drove the vehicle around the neighborhood and within a few minutes the noise came back. I took a video of the noise, see below.

As of the time of this post the vehicle is at my local dealership waiting for a service appointment tomorrow morning. Once I know more I will update this thread.

View attachment 52161

UPDATE 11/10/25​

I heard back from the dealership today. They said that it was the oil pump with the transmission that has gone bad and the entire transmission and torque converter need to be replaced. No ETA on the parts but they will be giving me a loner. I will be calling Toyota Brand Engagement in the next few days since that has seemed to help expedite things for other members of this forum.

I have to say I’m very disappointed with this news but I am very happy with the support of this forum. Thanks to the information I was able to gather from here I was able to “soften the blow” a little since I knew going into it that it could be a major issue. I will continue to update this thread as I go through this process so that maybe I can help the next person this happens to. Stay tuned…

UPDATE 11/12/25​

I spoke with Toyota Brand Engagement yesterday. I have an open case with them at the moment. Apparently, they have a specific department that tries to track down back ordered parts. We'll see where that gets me.

The dealership gave me a loaner: a Highlander. Its no LC but at least it has AWD since we're heading into winter here in NH.

I'm not sure what else I can do at this point but wait. When I hear more from the dealership or the Brand Engagement, I'll update this post.

I am getting exact same noise and conditions explained in your post. Booked for Jan 7 at the dealer.

 

[juuuiiiice]

I am getting exact same noise and conditions explained in your post. Booked for Jan 7 at the dealer.

Good Luck! How many miles/kilometers do you have on the odometer?

 

[jambo]

Good Luck! How many miles/kilometers do you have on the odometer?

40000 kms. Started making noise about 3000 kms back. Took the service guy for test drive yesterday and made him hear the sound since they could not replicate it. He was shocked and booked me in for Jan 7th. I just hope they can fix it quickly. I did buy extended warranty as well for peace of mind.

 

[lar317]

My son in law had his 2022 Highlander transmission go bad at 80k, Toyota agreed to pay half for an out of warranty transmission. I hope we get a tsb or a recall on this issue for the LC. I think everyone will need a transmission if there is a design flaw.

 

[67siia]

Following

 

[BJane]

My 2024 First Edition had the same screeching noise at a stop plus lurching upon acceleration, like a faulty shift change. It was in the shop for 5 1/2 weeks, due to parts ordered from Japan, first the transmission pump and then gaskets and seals for the second order. It was only the transmission pump that was replaced, a little over 10K miles, thankfully under manufacturer's warranty.

I asked about a redesigned pump, as it seemed to be a defective design with many going out at low mileage like mine, and the service advisor didn't know. I asked if there were metal shavings, and he didn't know. I am glad that this pump is being redesigned; I am left to wonder if the replaced pump is the same defective design that lasted for 10K miles and I will be due for a repeat of this experience at my expense next time. Better keep the 26 year old Mercedes E320 station wagon in the meantime as a backup . . . .