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Not sure what you mean by temperature needs to be at least 170 F? Are you talking about operating temp or transmission fluid temp or you are talking about checking the fluid level?
Also there is no relearn so to speak, Techstream only can do learning value reset and when the car is driven, it will relearn by itself.
I said fluid temperature I believe so yes fluid temperature needs to be 170 minimum before not only checking level but draining the little in the valve body. And I have been a lexus tech for many years. I work on our shops foreman team or group if you will so my understanding about the programming and what these cars do is pretty extensive. I'm not trying to sound rude or mean I just want you to understand the transmission just doesn't learn as you drive. It doesn't relearn with the battery and capacitors being drained like the pcm resets do. So your highly incorrect. Please don't give false information unless you know as that can really be the difference in reliability or something else. Unless all my training and lectures attended from the actual programmers of this car for lexus is wrong then idk what lectures and trainings I was at.
You weren't aware that the temp needed to be at least 170 so how do you know about the pcm and tuning aspect of these vehicles?
That is interesting. Techstream can't do relearn period, it can only do learning reset and initialization to your factory values. These values will change as you drive your car and that process called relearn.
The service manual and many Lexus master techs that I know said checking the transmission fluid level when it is around 104 F to 113 F. Can you show me a documentation that said checking the transmission fluid level at 170 F?
No bother at all. But if I was you, I would take the car to the mechanics and have him recheck the fluid level again. Just make sure to let the transmission fluid cool down the recommended temp (104 to 113) before checking. Your symptom seems like the fluid is overfilled.
That is interesting. Techstream can't do relearn period, it can only do learning reset and initialization to your factory values. These values will change as you drive your car and that process called relearn.
The service manual and many Lexus master techs that I know said checking the transmission fluid level when it is around 104 F to 113 F. Can you show me a documentation that said checking the transmission fluid level at 170 F?
actually do me one better show me the service manuel you are referring to that gives those value ranges. I will have to get the service manuel pulled up and take a picture when I have some downtime in the shop but please do show me the service manuel you are referring to. I'd like to see it.
Also you said it can't do a relearn period it can only do a learning reset? Isn't that learning. Yes it does go back to factory values but what is does after being reset is in closed loop it learns the psi that each valve needs especially the sli valve needs to operate. New tranny fluid more slippery and thinner. Pressure change.
Alot of the times i disable to temp detection for the transmission when refilling by jumping the pins on the obd2 port when refilling but I'm sure you know that is a good thing to do since you've talked to all these lexus master techs. I was waiting for the ever famous "lexus master tech" to be said.
Do a search and you will see it. Your 170 is completely out of line and gave people bad info.
^^ Thanks and you are correct. The content posted is in error and would result in a low fluid level, damaged transmission. Do NOT check fluid at 170°, it will be an expensive mistake!!! See below.
I'm sticking with Tribal Knowledge!
That are supported by facts!
And this is pretty clear NOT to exceed 120° F....
OK, maybe there was some kind of miscommunication, whereby 176°F is valid range BUT ONLY FOR checking line pressure! We are checking fluid level! And notice the vehicle selected and temperature range for said check! Right from the manual!
So....
Tags for searching / future reference.
#2IS Service
#2IS Facts
#2IS Maintenance
Last edited by 2013FSport; 04-09-21 at 07:03 AM.
Reason: Cropped a boarder, reload pic
Thanks everyone for your input, it's been a very interesting and spirited discussion! My mechanic as a precaution is rechecking the fluid level today, he will warm the transmission to the specified temp after letting it cool below 86F. He's also going to perform the ECM memory reset. As I mentioned, he's done a ton of Toyota's and Lexus transmission fluid swaps, so I trust he'll get it right. Again, I thank all of you for your collective knowledge...and documentation!
OK, got the car back from my mechanic about an hour ago. He decided to do another flush. Made sure the fluid was the proper level, reset the ECM memory. Surging is GONE. I can hardly feel her shift they are so smooth. I had to set it to display the gears just to make sure. Damn, now I can't put down that IS500 pre-order...
^^ Thanks and you are correct. The content posted is in error and would result in a low fluid level, damaged transmission. Do NOT check fluid at 170°, it will be an expensive mistake!!! See below.
I'm sticking with Tribal Knowledge!
That are supported by facts!
And this is pretty clear NOT to exceed 120° F....
OK, maybe there was some kind of miscommunication, whereby 176°F is valid range BUT ONLY FOR checking line pressure! We are checking fluid level! And notice the vehicle selected and temperature range for said check! Right from the manual!
So....
Tags for searching / future reference.
#2IS Service
#2IS Facts
#2IS Maintenance
Yes miscommunication on my end. I was under the impression that op wanted to check his line pressure as I mentioned psi several posts earlier with regards to the solenoids. My apologies for not understanding what was being asked and what was wanting to be checked.
Yes miscommunication on my end. I was under the impression that op wanted to check his line pressure as I mentioned psi several posts earlier with regards to the solenoids. My apologies for not understanding what was being asked and what was wanting to be checked.
I'm glad that was cleared up, I'm also glad you are sticking around. A knowledgeable trained Lexus tech is a valuable asset to this community. It was just a simple transmission fluid swap, flush, or whatever one calls it. Simple is probably the wrong word because lots can go wrong if not done correctly. Thankfully everything is now working properly, transmission is operating smoothly. Case closed.
This will be my last post on this, I promise. Today took her out on an extended drive and I don't know if it's swapping the fluid out twice or the ECM memory reset, but she is so buttery smooth right now. I feel like I'm getting so much more power to the wheels, she actually wanted to spin the rear wheels a few times LOL! I don't need to rev her out as much, and freeway driving feels great. I am glad I took it back to him. OK, now on to enjoying the rest of the weekend!
04-08-21, 10:30 PM
