GX460 P2714 P0761 Ultimate Summary and Hope For A Fix Thread (5 Viewers)

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r2m said:
Even though I'm an an engineer, it just amazes me the valving and the maze in automatic transmissions and still don't quite get it.
Albeit, I've never spent any time looking into how a auto trans work. :meh:
Click to expand...
When I joined the army my motor pool sergeant told me that an automatic transmission you just had to take it apart, lay it out in order, replace the bad pieces, and put it back together. Granted this is a lot more complicated than the turbo 350 we took apart in the shop, but it mostly holds true and pictures help a lot.
 
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jakemccurdy said:
Where are you guys getting $8k quotes? Not sure how much labor is involved but a new trans from lexus is only about $3500. 2010 Lexus GX 460 Automatic Transmission. Driveline - 3501035B7084 | Bell Lexus North Scottsdale, Scottsdale AZ - https://parts.belllexusnorthscottsdale.com/p/Lexus_2010_GX-460/Automatic-Transmission/69296851/3501035B7084.html

Is it really 4500 in labor to replace?
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Hi! Yes, I called a Toyota dealer, Lexus dealer, Indy Toyota shop and transmission shop. All at the time said the part was on back order and all came in 7000-8500k for parts, labor, etc.
 
jakemccurdy said:
Where are you guys getting $8k quotes? Not sure how much labor is involved but a new trans from lexus is only about $3500. 2010 Lexus GX 460 Automatic Transmission. Driveline - 3501035B7084 | Bell Lexus North Scottsdale, Scottsdale AZ - https://parts.belllexusnorthscottsdale.com/p/Lexus_2010_GX-460/Automatic-Transmission/69296851/3501035B7084.html

Is it really 4500 in labor to replace?
Click to expand...
Part of the problem has been finding a transmission. There seems to have been a shortage. That couple with every dealer seems to make up their on pricing so the Toyota dealer here in Auburn might quote me $4800 for the same part you can get for $3500 in Scottsdale.

Even the junkyard pulls I've seen have been ~$3000 from Florida to South Carolina.
 
BamaPaul said:
Part of the problem has been finding a transmission. There seems to have been a shortage. That couple with every dealer seems to make up their on pricing so the Toyota dealer here in Auburn might quote me $4800 for the same part you can get for $3500 in Scottsdale.

Even the junkyard pulls I've seen have been ~$3000 from Florida to South Carolina.
Click to expand...
@BamaPaul

For us watching your story, can you cover with us what you purchased for your rebuild? I assume Sonnex kit, a few solenoids, filter and fluid? Did you touch the valve body?

I am not as mechanically inclined, nor do I have the space, but I hope to call around to a few Transmission shops who are.
 
BamaPaul said:
Part of the problem has been finding a transmission. There seems to have been a shortage. That couple with every dealer seems to make up their on pricing so the Toyota dealer here in Auburn might quote me $4800 for the same part you can get for $3500 in Scottsdale.

Even the junkyard pulls I've seen have been ~$3000 from Florida to South Carolina.
Click to expand...
I've had good luck with getting Toyota shops to match Bell Lexus pricing. I just ask for Wholesale, show them the price Bell Lexus has it for and they've played ball. Bell doesn't stock much, it all gets shipped in from a Toyota warehouse and they're all paying the same price to corporate I would assume.

Hoping to hear your fix solves it and the rest of these guys can follow your lead. I'm coming up on 200K and have zero interest in changing vehicles so I'm sure I'll have some sort of tranny issue eventually.

One note on fluid; my mechanic flushed mine at 160K-sh. Mine was all Lex serviced and but I don't think they ever flushed it before I got it. I was worried and asked my guy how bad the fluid was. He said it was pretty black and then said 'but they're all black after like 20K miles so that doesn't mean anything'.
 
For reference - this is MaxLife ATF after around ~40K miles. It very rarely got above 200F as my 470 has a Hayden 678. So yes, the fluid will turn darken, particularly if you are running a non-synthetic fluid that is less heat tolerant than a full synthetic fluid. However, IMO, if it is truly black, it was probably in there past it's useful life.
20240330_083048.jpg
 
Acrad said:
I’m gonna do a simple drain and fill this summer as at around 35k miles since my 50K fluid exchange and adding external cooler years back.

Just cracked 86k miles on my ‘12.
Click to expand...
LOL, you know what you need to do this summer? Drive more!!!
 
StriderWolf said:
@BamaPaul

For us watching your story, can you cover with us what you purchased for your rebuild? I assume Sonnex kit, a few solenoids, filter and fluid? Did you touch the valve body?

I am not as mechanically inclined, nor do I have the space, but I hope to call around to a few Transmission shops who are.
Click to expand...
I have techstream, so troubleshooting the solenoids was easier. TS allows you to individually activate each solenoid to see if they are working properly and allows you to activate it back to back to back to try and pass particulates through it if they are slightly clogged. I troubleshot my solenoids and actuated each multiple times, which seemed to help with issues for a while. When codes popped up again I replaced the solenoids that has issues with Toyota parts, which I found by going through threads and parts diagrams. I'll look through my notebook and see if I still have part# = solenoid s1 etc... all of these are on the outside of the valvebody and are easily accessible if you drop the pan, but are expensive @ $100+ each. Filling the transmission pan back up via techstream or the paperclip in pins 4 and 13 method is the most time consuming part of solenoid replacement.

Even after replacing solenoids the codes came back sporadically. So I decided I'd try the Sonnax part and see if that fixed my issue after reading through the beginning of this thread. I reached out to Sonnax to ensure I was getting the correct part number and where to get it. Their suggestion was rockauto but the were also sellers on eBay.

For transmission fluid I used Idemitsu Automatic Transmission Fluid type TLS-LV, 12pk - ATF Oil Auto Transmission Fluid, Compatible with Toyota, Lexus, Scion https://a.co/d/ifY31VW since it was the cheapest way I could find anywhere and after some research it looks like Idemitsu manufacturer the WS fluid for Toyota.

When installing the Sonnax plug the valve body has to be removed and disassembled. This is scary the first time stepping into it blind because the is next to zero information on the 6 speed transmission in the GX460. Luckily there is some information on the LS460, the tundra, and the 4 runner with the 6 speeds, which all seem to have the same issues to different degrees. So I tried to take as detailed pictures as I could to help out the next poor guy laying on his concrete floor at 10pm trying to figure out where the balls are all supposed to go.

The costs of the job...
-Transfer pump $10 - I use a cheap 12v fuel pump from Amazon and a Milwaukee 18v battery to pump all of my new clean oil.
-Oil $70-130 depending on where you get it. You'll need about 1.5 gallons each time you pull the pan.
-Solenoids are north of $100 each for some and others are cheaper. I think I spent $500-600 on solenoids to replace them all.
-Sonnax kit $37 shipped
-Time, on my back under the truck, about 4-6 hours steady with a big chuck of that being refilling the transmission by Toyota procedure.

If I was taking this to a shop to do just the Sonnax plug I would expect $200-300 in parts and another $600-800 labor. If I you do all the solenoids too I'd add another $700-800 in parts.
 
There are Chinese solenoids out there for way cheaper ($350), but that's a crap shoot and there are refurbished valve bodies on eBay for $450, but again that's a crap shoot as what constitutes refurbished.

A good valve body, a Sonnax plug, and all new solenoids in the valve body, sold as a package would make this a gravy job, that could be done in about 2 hours. If there's interest in me setting up a few that are plug and play swappable DM me and I'll see what true costs will be.
 
BamaPaul said:
I have techstream, so troubleshooting the solenoids was easier. TS allows you to individually activate each solenoid to see if they are working properly and allows you to activate it back to back to back to try and pass particulates through it if they are slightly clogged. I troubleshot my solenoids and actuated each multiple times, which seemed to help with issues for a while. When codes popped up again I replaced the solenoids that has issues with Toyota parts, which I found by going through threads and parts diagrams. I'll look through my notebook and see if I still have part# = solenoid s1 etc... all of these are on the outside of the valvebody and are easily accessible if you drop the pan, but are expensive @ $100+ each. Filling the transmission pan back up via techstream or the paperclip in pins 4 and 13 method is the most time consuming part of solenoid replacement.

Even after replacing solenoids the codes came back sporadically. So I decided I'd try the Sonnax part and see if that fixed my issue after reading through the beginning of this thread. I reached out to Sonnax to ensure I was getting the correct part number and where to get it. Their suggestion was rockauto but the were also sellers on eBay.

For transmission fluid I used Idemitsu Automatic Transmission Fluid type TLS-LV, 12pk - ATF Oil Auto Transmission Fluid, Compatible with Toyota, Lexus, Scion https://a.co/d/ifY31VW since it was the cheapest way I could find anywhere and after some research it looks like Idemitsu manufacturer the WS fluid for Toyota.

When installing the Sonnax plug the valve body has to be removed and disassembled. This is scary the first time stepping into it blind because the is next to zero information on the 6 speed transmission in the GX460. Luckily there is some information on the LS460, the tundra, and the 4 runner with the 6 speeds, which all seem to have the same issues to different degrees. So I tried to take as detailed pictures as I could to help out the next poor guy laying on his concrete floor at 10pm trying to figure out where the balls are all supposed to go.

The costs of the job...
-Transfer pump $10 - I use a cheap 12v fuel pump from Amazon and a Milwaukee 18v battery to pump all of my new clean oil.
-Oil $70-130 depending on where you get it. You'll need about 1.5 gallons each time you pull the pan.
-Solenoids are north of $100 each for some and others are cheaper. I think I spent $500-600 on solenoids to replace them all.
-Sonnax kit $37 shipped
-Time, on my back under the truck, about 4-6 hours steady with a big chuck of that being refilling the transmission by Toyota procedure.

If I was taking this to a shop to do just the Sonnax plug I would expect $200-300 in parts and another $600-800 labor. If I you do all the solenoids too I'd add another $700-800 in parts.
Click to expand...
Amazing! Thank you for the write up, cost and info on your journey!!!! So helpful and may help out many many more with these!
 
BamaPaul said:
There are Chinese solenoids out there for way cheaper ($350), but that's a crap shoot and there are refurbished valve bodies on eBay for $450, but again that's a crap shoot as what constitutes refurbished.

A good valve body, a Sonnax plug, and all new solenoids in the valve body, sold as a package would make this a gravy job, that could be done in about 2 hours. If there's interest in me setting up a few that are plug and play swappable DM me and I'll see what true costs will be.
Click to expand...
FYI, my A750F recently threw a code for a electrical problem in the TCC solenoid (P2759) or associated wiring. I was able to find a new OEM Toyota solenoid for around $100 via Partsouq, so that could be a good source to order solenoids in bulk to generate A760F kits. My local dealer wanted $200 for the same solenoid.

For my rig I am not sure if the solenoid is actually bad but will just replace it, along with the interior trans harness, anyway, given that it was relatively inexpensive and my harness leading to the trans has checked out via a multimeter. The trans harness was only $39 on Partsouq.
 
BamaPaul said:
When I joined the army my motor pool sergeant told me that an automatic transmission you just had to take it apart, lay it out in order, replace the bad pieces, and put it back together. Granted this is a lot more complicated than the turbo 350 we took apart in the shop, but it mostly holds true and pictures help a lot.
Click to expand...

When I dropped a small block Chevy in my FJ55 in the early 80's looked around for a hydramatic 350 but couldn't find one. They were the gold standard for Man A Free Landcruiser conversions with a SBC but I didn't look too hard as I trusted manual trannies and automatics were vodoo LOL. And that is coming from someone that could and did repair a lot of gear driven pumps and turbines on ships, some with more than 120 gears in one unit. Each matching pair had to be marked and set.

Very well done! Bravo Zulu Army.
 
jakemccurdy said:
I've had good luck with getting Toyota shops to match Bell Lexus pricing. I just ask for Wholesale, show them the price Bell Lexus has it for and they've played ball. Bell doesn't stock much, it all gets shipped in from a Toyota warehouse and they're all paying the same price to corporate I would assume.

Hoping to hear your fix solves it and the rest of these guys can follow your lead. I'm coming up on 200K and have zero interest in changing vehicles so I'm sure I'll have some sort of tranny issue eventually.

One note on fluid; my mechanic flushed mine at 160K-sh. Mine was all Lex serviced and but I don't think they ever flushed it before I got it. I was worried and asked my guy how bad the fluid was. He said it was pretty black and then said 'but they're all black after like 20K miles so that doesn't mean anything'.
Click to expand...
I too leverage Bell's pricing at my local Lexus dealer along with showing my military I.D. ;)
So far it works! 🤞
 
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