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Transmission Fluid Flush

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Old Mar 9, 2020 | 10:11 AM
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Default Transmission Fluid Flush

Hello, i recently bought an 06 is250 and thinking on doing a transmission fluid flush, asked lexus dealership and they said “it should have a lifetime warranty and it could damage the transmission if i flush it”(called toyota too they said they would do it for 250), just wants to know if anyone has damaged trans from flushing it or it made it better, Thanks in advance!
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Old Mar 9, 2020 | 10:22 AM
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My mechanic has done it on two of my Toyota's that have "lifetime" fluid, namely my 2006 Camry SE at 50K and 100K (the car now has almost 150K) and my 2013 Toyota Sienna he did it at it's 100K service (it now has 135K). I've had no issues from the transmissions of either car. If it's done correctly by someone who knows how to do it properly, than there should be no issues. The main thing is to do it in a way where the metal shavings don't get into the gearing or clog up the flow of the fluid, as well as not starving the transmission, thus the reason I don't want to do it myself

Last edited by AMIRZA786; Mar 9, 2020 at 10:28 AM.
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Old Mar 9, 2020 | 05:05 PM
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Wont hurt any new fluid better than old fluid. I did mine at 172k for the first time cause been lazy. It pretty much a drain and fill. Took about 3.5 quarts. Was there a difference in shift nothing I noticed. But this summer I plan to do another cause I wanna replace the transmission filter also.I pretty much straight forward process and a lot of member have done it with no issues.
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Old Mar 10, 2020 | 06:13 AM
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Just bought my IS350C last month with 70K miles. The dealer here in Tampa did the 12 quart complete flush for under $300. No problems, shifts nice and smooth at all the right places.
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Old Mar 10, 2020 | 07:39 AM
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Never visit that Lexus dealership again!

I'd take up Toyota on their offer there; that's very reasonable.
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Old Mar 10, 2020 | 07:44 AM
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Originally Posted by Minoriku25
Hello, i recently bought an 06 is250 and thinking on doing a transmission fluid flush, asked lexus dealership and they said “it should have a lifetime warranty and it could damage the transmission if i flush it”(called toyota too they said they would do it for 250), just wants to know if anyone has damaged trans from flushing it or it made it better, Thanks in advance!
Your dealership statement is incorrect. Change the fluid.... And although you'll find 100's of threads on this topic, no harm will come from changing the fluid if done properly.
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Old Mar 10, 2020 | 04:24 PM
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Lexus claims lifetime fluid (not lifetime warranty), but we all know what that means. Drain and fill the transmission for a car that old. A flush runs the risk of gunk and particles coming loose and gumming up the works (solenoids, valve, etc).

Lexus dealers won't flush the transmission but Toyota dealers do. Don't know what to make of that(?)
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Old Mar 10, 2020 | 06:42 PM
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Originally Posted by sktn77a
Lexus claims lifetime fluid (not lifetime warranty), but we all know what that means. Drain and fill the transmission for a car that old. A flush runs the risk of gunk and particles coming loose and gumming up the works (solenoids, valve, etc).

Lexus dealers won't flush the transmission but Toyota dealers do. Don't know what to make of that(?)
The fluid needs to outlast the cars warranty period so they don't have to make a warranty repair for a failed transmission.

All that aside, please show some factual evidence of a transmission like the A960 or A760 failing from a fluid flush. I'll state that everything that has failed was failing before the fluid flush so it didn't change the fate of the transmissions health.

Adding to this, nearly everyone who has posted anything about solenoid failure, failed to test the solenoid and swapped solenoid and their problem was not fixed.

Why? Mainly because the solenoid isn't what failed. The TCU told the solenoid(s) to change state and waits for it to go to a new gear. When it doesn't the TCU throws a code related to the last instruction given which was to change state of solenoid (x).

I'm just saying there are 100's of things to go wrong in an auto trans. Most are misdiagnosed! Most are not related to changing the fluid. That's an old tale, pre-1980 timeframe....
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Old Mar 12, 2020 | 10:33 AM
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Originally Posted by Minoriku25
Hi! You replied on my post about transmission fluid flush

i just don’t know what to do, so i had a P2714 pressure control solenoid “D” Performance or stuck off. Told my mechanic friend about it he recommended a transmission fluid flush,(so he did part of it) after that, driving kinda got worse, more shift slipping and after driving the car for 30mins or so, acceleration on 5/6th gear is super slow, not sure if he put the correct amount of fluid or not.Told my mechanic friend about it getting worse, he said “lets change the filter, fluid, solenoid and gasket” did an actual transmission check from a shop, they said that “the code has been there, but the solenoid works, but the whole transmission needs to be fix” I'm not quite sure what he meant by that. I just dont wanna do a “lets do this and hope itll fix the problem” and thinking on just getting a used trans and replacing it(even with that it still has a high risk on failing) or i should just go to an actual shop for them to rebuild.
im sorry to bother and thanks in advance!
Years ago I used to work at major chain in this industry. That said, I really don't know how they manage change today. By this I mean we used to get bulletins for all the updates from the big manufacturers on what needs fixed to make a rebuilt trans last and at this point I speculate this is hit or miss depending on the shop.

If I were you I would weigh out the price for all options including any warranty for rebuild or ebay used plus install cost. If rebuild fits into the scope of your options, ask candid questions like what updates are available, who do you get your service kits from, where is the rebuilt/reman torque converter from, have you ever done this model, etc etc, stuff like that.

Now weigh it all out. What is the best option for you!
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