Fixed P2714 on 08 LX 570, probably dealer put the wrong trans oil filter (1 Viewer)

[yeLwWm]

My 2008 LX 570 (210K miles) showed P2714 (Pressure Control Solenoid D Performance/Stuck Off) last year after dealer serviced the trans, the first time it showed up with stuck at 4th gear not going to 5/6th gear. The trans is AB60E, 6 speed.

So I pulled over and restarted the engine then drive back to normal, no issue with trans. I went to dealer, they said everything is fine, diagnosis fee is about $150.
After that, every 3~6 months the code P2714 show up again, but with no issue with shifting.
Finally, I decided the to replace the Solenoid SLT (Toyota Part No.: 35290-34010) by myself.

Took it off:

Checked it but seems fine, should be in range 5.0~5.6 Ohms, it's 5.8 Ohms not that bad. I replaced it with brand new one.

Suddenly, I realized that the OLD oil filter is wired:

The wrong oil filter probably was the leading cause! The old one doesn't have the raised tube so sometime will suck some air into it, might cause the issue. Any thoughts on it?

I put everything back, refilled new oil and checked oil level. The trans works smooth! No issue with 1K miles so far.

Will keep report if the P2714 is completely gone. What a dealer's s*** job!

 

[yeLwWm]

After couple of weeks, the code P2714 showed up again.

I cleaned the code and also change vehicle speed sensor, part no is "89413-20011".

So far, the code didn't show up anymore. Will keep updating.

 

[joyRidaz]

@yeLwWm I’m carefully watching this as I’ve been dealing with this for years. I’m very depressed that switching the solenoid didn’t fix

Question: what made u change the speed sensor?

Also was changing the solenoid diy a challenging job? Always assumed that would fix it. I did a diy full flush of my trans fluid, and keep thinking that maybe it’s low due to a leak or user error.

 

[yeLwWm]

Question: what made u change the speed sensor?

But still need time to prove that if the speed sensor fixed the P2714.

Also was changing the solenoid diy a challenging job?

Not really, for me it's one hour job including changing oil and filter, clean oil pan and replace solenoid. If your solenoid is in good range (5.0~5.6 Ohms), I don't think need to replace. You can check the solenoid Ohms without drain the oil or remove the oil pan.

 

[yeLwWm]

Today the code P2714 showed up again, after changed vehicle speed sensor.

No problem with shifting, so just erased the code.

 

[njbrain]

Your valve body is likely worn out. Instead of replacing the transmission your could try this. TransGo SHIFT KIT Valve Body Repair Kit with Tools A750E (5 SPD) | A760 | 761 | 960 | AB60 (6 SPD) 2003+ | SK A750-WTA - https://www.vividracing.com/transgo-shift-kit-valve-body-repair-kit-with-tools-a750e-spd-a760-761-960-ab60-spd-2003-p-156356097.html?gad_source=1&gclid=EAIaIQobChMI6Yrw0dqdhQMVtCStBh16XAbbEAQYAiABEgKF6fD_BwE

 

[yeLwWm]

@njbrain thanks for the information.

 

[yeLwWm]

@joyRidaz

Update@May 2024:
I noticed last time when the P2714 showed up was on a 15% angle downhill road, So I added 3/4 quart of WS oil and the code never show up after 1000 miles drive.

 

[joyRidaz]

@yeLwWm thanks for the insight, mine too seems to be also happening on slight inclines so I’ll need to investigate. That would be such a wonderful easy fix!

 

[joyRidaz]

@njbrain - did a new valve body cure a similar situation for you ? Is the swap diy friendly?

 

[njbrain]

@njbrain - did a new valve body cure a similar situation for you ? Is the swap diy friendly?

It is not really DIY friendly. There are lots of small bolts and check balls that have to be in the right place. I was not setting the code but I had a shift flare on 1-2 that was fixed.

 

[yeLwWm]

update: after three months drive, no issue. Trans works totally fine.

 

[yeLwWm]

P2714 showed up again, I gonna try TransGo SHIFT KIT Valve Body Repair Kit.

TransGo - Toyota A750 SHIFT KIT® Valve Body Repair Kit with tools

This A750 SHIFT KIT® Valve Body Repair Kit fits 2003 and newer Toyota and Lexus vehicles equipped with the A750, A760, A761, A960 and AB60 series

transgo.com

2006 GX470 transmission issues

Around 200k miles and for a year or so Ive been having a delayed shift from R into D. I replaced the drive shaft and it seemed to help a little, but the delay was still there from time time. I also flushed the trans fluid and replaced the filter. A few weeks ago it started delaying the shift...

forum.ih8mud.com

 

[burtlively]

I battled a similar scenario as this for about a year or so. Was more of a nuisance than anything else. Eventually I let it get to my head for better or worse and feared I’d get completely stuck at some point. I had a new valve body installed and it made things worse. Ended up with a new transmission. For what it’s worth I was around 350,000 miles when I swapped transmissions.

 

[yeLwWm]

I battled a similar scenario as this for about a year or so. Was more of a nuisance than anything else. Eventually I let it get to my head for better or worse and feared I’d get completely stuck at some point. I had a new valve body installed and it made things worse. Ended up with a new transmission. For what it’s worth I was around 350,000 miles when I swapped transmissions.

Thanks for sharing. May I ask what problems occurred after replacing the valve body?

I plan to repair the valve body with a kit first. After all, it's only a 200-dollar part and a few hours of my own time. If it still doesn't work, I might look for a used trans.

 

[burtlively]

Only intermittent issues shifting prior (In retrospect I probably could’ve just kept on erasing codes and pulling over and restarting whenever I had issues). Shifting was so rough after valve body replacement it was unbearable. Yanked into each gear. It was undriveable. Once again, looking back, I would’ve had someone else do the valve body than who I had do it. There may have been a different outcome. But hindsight is always 50/50.
Anyways, I bought a remanufactured transmission and had my transmission guy bolt it up and it’s been great for 40,000 miles now. The truck may break down tomorrow, but I trust it to get me to and from wherever I want to go again, and for me it was worth it.

 

[joyRidaz]

very interested in this @yeLwWm ! Pls post pics and tips/tricks etc.

My 09 LX with 250k has been struggling with these codes for a while, def seems to hunt for gears when cold and on a slight incline…. My hack for the last year has been just using the quasi-manual gear shifting mode. But even then sometimes it’ll get stuck in 3rd gear not up shifting to 4th.

It almost seems like an ecu problem like it doesn’t know what gear it should be in, sometimes jumps up and then back down. Super weird

I agree with your risk analysis, minimal financial risk vs the potential reward.

But I fear it might be more challenging that my wrenching abilities.

 

[yeLwWm]

Spent about 5 hours to finish the TransGo work during the weekend.

But I lost reverse gear, so sad. Maybe I did something wrong or the previous owner did some wrong. The difficulty of fix valve body is like 7 out of 10. Please take lots of pics before you take parts out. Also do some notes to mark, really help a lot for anyone first time to do transmission work.

I decided to buy a brand new valve body from Lexus. Part Number: 3541060680.
Link: 2008 Lexus LX 570 Automatic Transmission Valve Body. OIL, PACKAGE-WITH, COOLER - 3541060680 - Genuine Lexus Part - https://parts.lexus.com/p/Lexus_2008_LX-570/Automatic-Transmission-Valve-Body/63067448/3541060680.html

 

[yeLwWm]

Great news! After adjust one retainer's position, so far the transmission driver great!

TransGo Parts 1:

TransGo - A750E/F, A760-761E/H, A960E, AB60E/F Valve Refill Kit

Repairs 5 different valve body families Easily address the most common driveability complaints plaguing these 5 and 6 speed Toyota RWDs

transgo.com

TransGo Parts 2 (a key part of a successful repair):

TransGo - A750-BOOST - A750 Pressure Regulator Boost Valve Kit

2003 and newer Toyota and Lexus vehicles equipped with A750, A760, A761, A960 and AB60 series automatic transmissions often wear out the line pressure

transgo.com

TransGo Parts 3 (Recommend, but I forget to buy):

TransGo - Specialty Components | Toyota Accumulator Piston

TransGo Toyota accumulator pistons provide a long term fix for a common wear area in these transmissions The original Toyota accumulator pistons have no

transgo.com

TransGo Parts 4:

TransGo - 960-VB-PLGS - Toyota end plug kit

2003 and newer Toyota and Lexus vehicles equipped with the A760, A761, A960 and AB60 series automatic transmission often come in with complaints of soft,

transgo.com

I only did TransGo Part1 & 2, if do it again, will apply all these 4. If you're planning on doing it, I highly recommend doing all four TransGos.

Watched several Youtube videos, I think I made some mistake during put Transgo kit. As shown in the picture below, the green area is the retainer should be put in, not the red area.

The locations of three parts that are easy to fall out as below:

Old worn out part:

Lubegard Dr. Tranny Assemblee Goo, please choose GREEN version, this is what you need when put the valve body back, some parts easy to drop, super helpful when you don't have second person assist you.

These parts are upside down when you install under your car. Need Assemblee Goo to put them in positions.

 

[yeLwWm]

Attachments are some PDFs might helpful.

Helpful videos:

3. Tundra and Tacoma AB60 A750 Valve Body Wear P0741 Code #tundra #shorts #sonnax - https://www.youtube.com/shorts/Ub0PC_m48ac
4. How to fix valve body wear in a Toyota Tundra AB60 #tundra #shorts #rebuild - https://www.youtube.com/shorts/gVBkfxMCuJY
5. Watch Out for This! AB60 Valve Body #shorts #Toyota #AB60 - https://www.youtube.com/shorts/667eSfhZcCo
6. Hidden Wear in a A750 / AB60 Valve Body Don't Overlook This! #shorts - https://www.youtube.com/shorts/zcFjOje9qp0