Transmission flush on 2IS350
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6th Gear
Joined: Nov 2022
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From: ONTARIO
Transmission flush on 2IS350
Hi all,
I’m getting a full transmission flush on my 2012 IS350 as I’m having some jerky shifts and delays. The car has 110K Km and has been meticulously maintained (plugs, oil, etc). My question is, is a full flush safe? I understand my Lexus dealer only does drain and fills and doesn’t replace the filter. I’m going to a professional shop who only works specifically on Lexus. He explained to me that my car isn’t at a high KM amount and that a flush is fine because the flush won’t be removing all of the gunk in the gears that keep it from shifting normally. I understand that this is a pretty good explanation. But should I go ahead anyway and do it?
any input is appreciated.
I’m getting a full transmission flush on my 2012 IS350 as I’m having some jerky shifts and delays. The car has 110K Km and has been meticulously maintained (plugs, oil, etc). My question is, is a full flush safe? I understand my Lexus dealer only does drain and fills and doesn’t replace the filter. I’m going to a professional shop who only works specifically on Lexus. He explained to me that my car isn’t at a high KM amount and that a flush is fine because the flush won’t be removing all of the gunk in the gears that keep it from shifting normally. I understand that this is a pretty good explanation. But should I go ahead anyway and do it?
any input is appreciated.
Hi all,
I’m getting a full transmission flush on my 2012 IS350 as I’m having some jerky shifts and delays. The car has 110K Km and has been meticulously maintained (plugs, oil, etc). My question is, is a full flush safe? I understand my Lexus dealer only does drain and fills and doesn’t replace the filter. I’m going to a professional shop who only works specifically on Lexus. He explained to me that my car isn’t at a high KM amount and that a flush is fine because the flush won’t be removing all of the gunk in the gears that keep it from shifting normally. I understand that this is a pretty good explanation. But should I go ahead anyway and do it?
any input is appreciated.
I’m getting a full transmission flush on my 2012 IS350 as I’m having some jerky shifts and delays. The car has 110K Km and has been meticulously maintained (plugs, oil, etc). My question is, is a full flush safe? I understand my Lexus dealer only does drain and fills and doesn’t replace the filter. I’m going to a professional shop who only works specifically on Lexus. He explained to me that my car isn’t at a high KM amount and that a flush is fine because the flush won’t be removing all of the gunk in the gears that keep it from shifting normally. I understand that this is a pretty good explanation. But should I go ahead anyway and do it?
any input is appreciated.
Guys, it grinds my gears when 'shops' state anything about some magic glue holding a 1990 to present year transmission together, anything about flush vs drain and fill. Why? New fluid is new fluid. WS fluid is nothing like the fluids of 30 years ago. Those fluids did breakdown, yellow, form varnish deposits and smell like turpentine as they failed. The varnish deposits formed at slip rings and fluid transfer points was effectively that 'magic glue' in that era of fluid technology. And when new ATF is added it being highly detergent, it is a solvent that is able to foster internal and external leaks when it cleans varnish which can cause a trans to fail. This is possible and you know by smell and color. The myth is not a lie! But - - this era has ended. It's gone and we've moved passed it since 1990 or so.
Moral of the story, change your transmission fluid. There is no risk today!
Here is a DIY for the 350. Use WS or Amsoil and let me know if you have any questions.
https://www.clublexus.com/forums/is-...a760e-rwd.html
It's pretty straight forward with a bluetooth device and OBD Fusion and you lay under the car watching the transmission temperature to set the fluid level.
Source - I used to build transmissions!
Last edited by 2013FSport; Nov 16, 2023 at 10:47 AM.
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