Transmission Fluid - Change or Not? (Merged threads)
12-02-22, 02:57 PM
#481
Instructor
If you do it yourself make sure you follow the Lexus service guide, the transmission has to come to a specific temperature, and you must replace the exact same amount as was drained. I am sure you can find the exact service guide on TIS, pay a few bucks to access it to print it out and have at it yourself.
12-02-22, 03:15 PM
#482
That's a fact. The people writing the American manual literally added the bit about being sealed for 'life', pulled it out of their ***. It's not in my manual. I don't think they got that line from Aisin's director of engineering either.
I wouldn't listen to a single word from a Lexus technician either, Lexus haven't taught them a single thing about rebuilding transmissions because they don't touch them, they just remove and install them. Unless they have prior experience in a tranny shop, they couldn't put a A760E back together if someone pulled one apart - it's simply not their job.
I believe the reason to change it is to refresh additives. Keeps the seals nice and the way it came out of the factory. I'm not worried about the colour.
I wouldn't listen to a single word from a Lexus technician either, Lexus haven't taught them a single thing about rebuilding transmissions because they don't touch them, they just remove and install them. Unless they have prior experience in a tranny shop, they couldn't put a A760E back together if someone pulled one apart - it's simply not their job.
I believe the reason to change it is to refresh additives. Keeps the seals nice and the way it came out of the factory. I'm not worried about the colour.
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jeverett72 (12-02-22),
jgscott (12-02-22)
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tompass (12-31-22)
12-03-22, 06:49 AM
#484
Just a question. If you could replace the same amount of fluid that you take out by measuring it and such without getting the fluid to a certain temperature, wouldn’t that be better and more accurate than replacing the fluid if both of them are at different temperatures? I would just think that the old fluid at let’s say outside air temperature of 75 degrees replaced with new fluid at the same temperature of 75 degrees would be equal volume. But hey, I am not a thermonuclear engineer.
12-03-22, 03:39 PM
#485
The 1st exchanges that gets the break in metals and materials drained out, are the most important.
We don't know if that Trans was ever serviced before he got it at 97k? Its a 100% unknown? By this thinking we could also say see.... likely it had 2 trans services and look at how far that allowed the Trans to go without any problems.
Go to IS and 3rd Gen GS forum. Same exact Trans. Lots have had problems past 150k.
We don't know if that Trans was ever serviced before he got it at 97k? Its a 100% unknown? By this thinking we could also say see.... likely it had 2 trans services and look at how far that allowed the Trans to go without any problems.
Go to IS and 3rd Gen GS forum. Same exact Trans. Lots have had problems past 150k.
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Cwang (12-03-22)
12-04-22, 07:19 PM
#486
Pit Crew
Just a question. If you could replace the same amount of fluid that you take out by measuring it and such without getting the fluid to a certain temperature, wouldn’t that be better and more accurate than replacing the fluid if both of them are at different temperatures? I would just think that the old fluid at let’s say outside air temperature of 75 degrees replaced with new fluid at the same temperature of 75 degrees would be equal volume. But hey, I am not a thermonuclear engineer.
Trans fluid was at 84K miles, never been pulled... Didn't even smell like trans fluid.
New amsoil fluid IMMEDIATELY gave me what felt like more power. Maybe just crisper shifts, but for only 20% of the fluid being renewed, I'm
impressed.
12-04-22, 10:16 PM
#487
Pit Crew
Just a question. If you could replace the same amount of fluid that you take out by measuring it and such without getting the fluid to a certain temperature, wouldn’t that be better and more accurate than replacing the fluid if both of them are at different temperatures? I would just think that the old fluid at let’s say outside air temperature of 75 degrees replaced with new fluid at the same temperature of 75 degrees would be equal volume. But hey, I am not a thermonuclear engineer.
Trans fluid was at 84K miles, never been pulled... Didn't even smell like trans fluid.
New amsoil fluid IMMEDIATELY gave me what felt like more power. Maybe just crisper shifts, but for only 20% of the fluid being renewed, I'm
impressed.
12-30-22, 05:37 PM
#489
Lexus Test Driver
The following users liked this post:
jptwo3 (12-31-22)
12-31-22, 05:15 PM
#490
If you do it yourself make sure you follow the Lexus service guide, the transmission has to come to a specific temperature, and you must replace the exact same amount as was drained. I am sure you can find the exact service guide on TIS, pay a few bucks to access it to print it out and have at it yourself.
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