GX460 P2714 P0761 Ultimate Summary and Hope For A Fix Thread

[yeLwWm]

I doubt the valve body was updated from 2010-2023

Don't know about GX460 VB, but my 2008 LX 570 VB has been updated.

Pics in my thread:

Fixed P2714 on 08 LX 570, probably dealer put the wrong trans oil filter

The P2714 showed up again. I think it's time to change the valve body. Valve body parts number: 35410-60680 Lexus part link: 2008 Lexus LX 570 Automatic Transmission Valve Body. OIL, PACKAGE-WITH, COOLER - 3541060680 - Genuine Lexus Part -...

forum.ih8mud.com

 

[yeLwWm]

A long time in stop and go traffic can cook a transmission too. I'm pretty sure the highest temps I've ever seen in mine was coming back from Maine after Thanksgiving and being stuck in traffic from basically Boston to NYC. Somewhere in Connecticut I started manual shifting which got things back to normal. (95 is my personal hell)

Heat is the enemy and the reason the transmission on the 460s is becoming a bit of an Achille's Heel is the lack of external cooling combined with the "lifetime" fluid claim from all the dealers. So you might have a GX with like 90,000 miles that has been absolutely babied by the first owner, except most of those miles were spent stuck in traffic on 95 and they've been driving with cooked transmission fluid for the last 2 years.

My 2008 LX 570 do has the transmission cooler, still got the P2714 issue.

 

[thescreensavers]

Don't know about GX460 VB, but my 2008 LX 570 VB has been updated.

Pics in my thread:

Fixed P2714 on 08 LX 570, probably dealer put the wrong trans oil filter

The P2714 showed up again. I think it's time to change the valve body. Valve body parts number: 35410-60680 Lexus part link: 2008 Lexus LX 570 Automatic Transmission Valve Body. OIL, PACKAGE-WITH, COOLER - 3541060680 - Genuine Lexus Part -...

forum.ih8mud.com

Thanks for that,

Looking up the GXs VB
Part Number and accociated production dates,
35410-60660 (01/2015-08/2019)
Replaces: 35410-35810 (08/2013-07/2014), 35410-35811 (08/2014-12/2014)

So we have 3 different part numbers. But seeing that 2017s have the same issues the revisions did not seem to solve the failure mode talked about in this thread

My 2008 LX 570 do has the transmission cooler, still got the P2714 issue.

Valve body wear is mainly from dirty/worn out fluid, higher temps would increase wear but accumulated wear from dirty fluid wears the VB.

 

[MGeorge]

My 2011 has a cooler

 

[Stebo]

Pretty sure no one anywhere has found a solution at least long term, anywhere, except for a replacement.

However if you replace the tranny and add a $50 Hayden 678 or 698 cooler you shouldn't have the issue again and no need to worry about it. And do a simple drain and fill of the ATF ~40-50K. Seeing how you are in South Texas I would also pin the thermostat on the transmission warmer open.

That makes 2 more from Texas so the updated numbers:

In this thread there are 20 different vehicles listed with locations as follows.
Texas x7
Florida x4
Arizona x2
California x2 (one is an A760E instead of A760F in an IS 350, same symptoms and codes)
South Carolina
Louisiana
Alabama
Tennessee
Mississippi

Heat. Although I am sure someone will come along again and say no it is caused by Mars being aligned with Uranus during a full moon....

You can add me to the list for Florida. I've been experiencing this for over a year. So naturally that's when I began loosely following this thread. At this point I just drive around with a code reader in the console and clear it as it pops up. I tow a 19' boat with my GX460, maybe like 3 times a year. Nothing crazy. Otherwise just city commuting and looking cool.

I don't track the frequency of the codes per se, but I'd estimate that the crazy light show pops up every 4-6 months. It's definitely more prevalent when there's a chill in the air, and we had a little cold snap here so it happened twice last week. The truck drives GREAT otherwise - no perceptible tranny problems - good kick downs, very smooth shifts, never been locked out of reverse or any other gears...

Like most people in here, when it's cold out (and I remember to do so), I use sport mode and shift myself until it warms up. I've never had the codes pop up while doing that, but it is a pretty small sample size. My issue is always with solenoid D. Even when I clear it out, there's a hard code that always remains in the background. My buddy has TechStream, I just haven't organized getting that code wiped since it doesn't bother me day-to-day.

I have flushed my fluid and added a Hayden, in reaction to the lights but it keeps happening. obviously. I figure i'll be swapping in a new tranny at some point, but for now I'm gonna keep doing what I've been doing until it gets intolerable. At the end of the day, I'm honestly not even that mad about $3k for a new transmission - since I can swap that out myself - seems like it could be a lot more expensive than that. Did I read correctly that the new replacement trans from lexus comes with a torque converter already installed?

If so, that's actually kind of a steal IMO. And I'd almost rather swap the whole thing than to chase around all these parts and deal with the constant disappointment/fear that they may not solve it anyway. Can you tell I'm a seasoned car guy and I've been there too many times? Bc I have Automatic transmissions might as well be black magic to me! I don't know jack about how they really work.

I guess I should mention the vehicle and situation: 2012 GX460, ~165,000 miles currently. I picked it up with about 148k or something like that. Not sure when the codes started. I bought the truck used from a dealership about 2 years ago, so it could be the reason the previous owner turned it in! who knows??

 

[Stebo]

Also, has anyone else noticed this parts kit in the catalog? Is this all the clutches and plug seals etc??

 

[Cold Iron]

A long time in stop and go traffic can cook a transmission too. I'm pretty sure the highest temps I've ever seen in mine was coming back from Maine after Thanksgiving and being stuck in traffic from basically Boston to NYC. Somewhere in Connecticut I started manual shifting which got things back to normal. (95 is my personal hell)

Heat is the enemy and the reason the transmission on the 460s is becoming a bit of an Achille's Heel is the lack of external cooling combined with the "lifetime" fluid claim from all the dealers. So you might have a GX with like 90,000 miles that has been absolutely babied by the first owner, except most of those miles were spent stuck in traffic on 95 and they've been driving with cooked transmission fluid for the last 2 years.

The 2 times that I have broke 240° in the pan was stop and go traffic. First time ambient air temp was in the low 60's in stop and go construction traffic the other was a year ago when it was in the 30's and I hit 3 stop lights after coming up a hill. There is a reason Toyota lists stop and go traffic under "special operating conditions". A thermostatically controlled fan in front of a tranny cooler would go a long ways to help keeping it cool IMO. North Jersey and the asphalt jungle would be a hard pass for me. Wonder what exit in Jersey? Hey it is SNL 50th anniversary I couldn't resist.

Thanks for that,

Looking up the GXs VB
Part Number and accociated production dates,
35410-60660 (01/2015-08/2019)
Replaces: 35410-35810 (08/2013-07/2014), 35410-35811 (08/2014-12/2014)

So we have 3 different part numbers. But seeing that 2017s have the same issues the revisions did not seem to solve the failure mode talked about in this thread



Valve body wear is mainly from dirty/worn out fluid, higher temps would increase wear but accumulated wear from dirty fluid wears the VB.

People come along on the FB 460 group and do that as well. Those that don't own a 460 replaced the solenoid(s) and or valve body on a Toyota XXX and all is now well. But no one has been able to do that successfully for any length of time on a GX460 A760F tranny. That dirty fluids is from the friction plates and clutch packs, it is the organic material that has come off. Which is not magnetic. And the plates and packs are already well worn and on their way to death throes. Throwing a new VB or solenoids at it is just putting lipstick on a dying pig.

You can add me to the list for Florida. I've been experiencing this for over a year. So naturally that's when I began loosely following this thread. At this point I just drive around with a code reader in the console and clear it as it pops up. I tow a 19' boat with my GX460, maybe like 3 times a year. Nothing crazy. Otherwise just city commuting and looking cool.

I don't track the frequency of the codes per se, but I'd estimate that the crazy light show pops up every 4-6 months. It's definitely more prevalent when there's a chill in the air, and we had a little cold snap here so it happened twice last week. The truck drives GREAT otherwise - no perceptible tranny problems - good kick downs, very smooth shifts, never been locked out of reverse or any other gears...

Like most people in here, when it's cold out (and I remember to do so), I use sport mode and shift myself until it warms up. I've never had the codes pop up while doing that, but it is a pretty small sample size. My issue is always with solenoid D. Even when I clear it out, there's a hard code that always remains in the background. My buddy has TechStream, I just haven't organized getting that code wiped since it doesn't bother me day-to-day.

I have flushed my fluid and added a Hayden, in reaction to the lights but it keeps happening. obviously. I figure i'll be swapping in a new tranny at some point, but for now I'm gonna keep doing what I've been doing until it gets intolerable. At the end of the day, I'm honestly not even that mad about $3k for a new transmission - since I can swap that out myself - seems like it could be a lot more expensive than that. Did I read correctly that the new replacement trans from lexus comes with a torque converter already installed?

If so, that's actually kind of a steal IMO. And I'd almost rather swap the whole thing than to chase around all these parts and deal with the constant disappointment/fear that they may not solve it anyway. Can you tell I'm a seasoned car guy and I've been there too many times? Bc I have Automatic transmissions might as well be black magic to me! I don't know jack about how they really work.

I guess I should mention the vehicle and situation: 2012 GX460, ~165,000 miles currently. I picked it up with about 148k or something like that. Not sure when the codes started. I bought the truck used from a dealership about 2 years ago, so it could be the reason the previous owner turned it in! who knows??

I agree with how you think. Yes the reman is ~$3.5K and includes the TC. Heck a used one at a pick and pull will likely cost that much. Good chance a full rebuild at a tranny shop costs more than that and no way I would have them do a piecemeal repair. There is a $1k core fee which you get back when you return your tranny.

Car Care Nut has a video about replacing a Tundra A750 tranny (you know the one everyone says is the good one?) with 108K on it. Is a construction truck that carries weight and tows sometimes. And stop and go traffic in Chicago, another place that is a hard pass for me. TC shudder and when cold same shifting issues that everyone is experiencing. First 5 minutes in he covers how Toyota does the reman tranny the case is the most expensive part and why the $1k core charge

 

[Cold Iron]

Also, has anyone else noticed this parts kit in the catalog? Is this all the clutches and plug seals etc??




View attachment 3854802View attachment 3854807

Just the gaskets. Here are the internal components

The clutch assembly alone is more than $1K

 

[r2m]

You can add me to the list for Florida. I've been experiencing this for over a year. So naturally that's when I began loosely following this thread. At this point I just drive around with a code reader in the console and clear it as it pops up. I tow a 19' boat with my GX460, maybe like 3 times a year. Nothing crazy. Otherwise just city commuting and looking cool.

I don't track the frequency of the codes per se, but I'd estimate that the crazy light show pops up every 4-6 months. It's definitely more prevalent when there's a chill in the air, and we had a little cold snap here so it happened twice last week. The truck drives GREAT otherwise - no perceptible tranny problems - good kick downs, very smooth shifts, never been locked out of reverse or any other gears...

Like most people in here, when it's cold out (and I remember to do so), I use sport mode and shift myself until it warms up. I've never had the codes pop up while doing that, but it is a pretty small sample size. My issue is always with solenoid D. Even when I clear it out, there's a hard code that always remains in the background. My buddy has TechStream, I just haven't organized getting that code wiped since it doesn't bother me day-to-day.

I have flushed my fluid and added a Hayden, in reaction to the lights but it keeps happening. obviously. I figure i'll be swapping in a new tranny at some point, but for now I'm gonna keep doing what I've been doing until it gets intolerable. At the end of the day, I'm honestly not even that mad about $3k for a new transmission - since I can swap that out myself - seems like it could be a lot more expensive than that. Did I read correctly that the new replacement trans from lexus comes with a torque converter already installed?

If so, that's actually kind of a steal IMO. And I'd almost rather swap the whole thing than to chase around all these parts and deal with the constant disappointment/fear that they may not solve it anyway. Can you tell I'm a seasoned car guy and I've been there too many times? Bc I have Automatic transmissions might as well be black magic to me! I don't know jack about how they really work.

I guess I should mention the vehicle and situation: 2012 GX460, ~165,000 miles currently. I picked it up with about 148k or something like that. Not sure when the codes started. I bought the truck used from a dealership about 2 years ago, so it could be the reason the previous owner turned it in! who knows??

Yeah, I've done my share of swapping out manual transmissions and clutches also, but never wanted to swap out an automatic. Too stink'n heavy. And I agree, it is kind of like a magic box that just changes gears. I have a little understanding, but not much about them.

 

[Stebo]

welp that about seals the deal for me... sticking to the plan (getting a new trans)...

 

[Stebo]

Especially if I spend $3500 and then get $1000 back... so net $2500???

it's almost a no-brainer to me. Again because I can def. swap a transmission in my driveway; Factor in the transcooler that I already installed, and the knowledge that just keeping up with fluid changes basically negates future problems.

 

[r2m]

Especially if I spend $3500 and then get $1000 back... so net $2500???

it's almost a no-brainer to me. Again because I can def. swap a transmission in my driveway; Factor in the transcooler that I already installed, and the knowledge that just keeping up with fluid changes basically negates future problems.

If you have the time and remember, take lots of pictures and share! (that's my problem when wanting to share a project, I always forget to take the photos)

 

[Banandalorian]

A thermostatically controlled fan in front of a tranny cooler would go a long ways to help keeping it cool IMO.

I feel like our giant radiator fans should be moving plenty of air through auxiliary coolers in front of the radiator at low speeds already. A dedicated fan would move more air but not sure if the juice is worth the squeeze.

 

[Splat]

Especially if I spend $3500 and then get $1000 back... so net $2500???

No, you pay an additional grand at purchase. That gets returned to you when you send back the old transmission.

 

[Cold Iron]

I feel like our giant radiator fans should be moving plenty of air through auxiliary coolers in front of the radiator at low speeds already. A dedicated fan would move more air but not sure if the juice is worth the squeeze.

Kind of where I am at. I can pull the buggy which is only 2,500 pounds up the Mississippi River bluffs or anywhere else no problems with heat. As long as I keep moving. But stop at a light or anywhere else like construction right after and it climbs and keeps on going up. 240° at the pan makes me nervous once it gets there TC doesn't come down much if at all. I only see that when sitting still.

JEFFKISTHENAME is the only one that I know of that has a cooler with a fan. In his build thread it was sitting in his living room on Christmas Eve and keeping an eye on his build update. But for the most part not really too worried once I put the Hayden in. Which will be soon the snow is starting to melt. Blew a foot of the white chit out of the driveway Tuesday during a blizzard, Mother Nature likely has at least one more in her over the next couple of months. If I lived further South like 70% of the people in Canada do LOL I'd be really tempted to do the fan. But would want it thermostatically controlled and no idea where to tie that piece in but haven't looked, doubt that I will and is the other thing stopping me from doing it.

 

[fadkar]

which is why a transmission cooler and filter and frequent fluid changes should be done to protect the transmission and valve body to extend their life

After reading through this thread, it seems like a cooler and fresh fluids may not be enough since the valve bodies are prone to getting clogged w/ debris. Of course, frequent fluid changes will help reduce the debris, but I'm now considering adding a filter for the extra peace of mind. I'd assume a filter would reduce pressure for the AT though? Could that cause any unforeseen issues?

 

[thescreensavers]

Id assume a filter would reduce pressure for the AT though? Could that cause any unforeseen issues?

The filter is installed on the cooler line which isn't normally open until the thermostat opens so there is zero issue with that regard. Also Most filters including the Magnefine(that I have personally installed) have a bypass "if" they get plugged up.

I currently have the thermostat pinned open so the filter is seeing constant flow.

 

[yeLwWm]

Pics of my 2023 Sequoia Hybrid, 10 speed transmission, Toyota changed the filter to a paper filter, a real one.

 

[Davidsel47]

I stopped looking for GX specific transmissions and started searching for A750f transmission and have found some good deals on remanufactured transmissions, as low as $2400.

 

[thescreensavers]

I stopped looking for GX specific transmissions and started searching for A750f transmission and have found some good deals on remanufactured transmissions, as low as $2400.

You are in a 460 thread, that's on the 470.