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DIY transmission fluid change question for IS250

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Old 01-20-18, 03:21 PM   #46
2013FSport
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As for new or any fluid expanding the existing rubber O-rings or seals that is not true of anything but those transmission rebuilds in a can. Those have things like either or/or other products with binders that reduce their evaporation period. Once added, these products **magically induce swelling** of rubber like O-rings and and ya, some leaks are reduced. And when the additive evaporates, the trans leaks like a sieve.

Rubber, neoprene, and other pliable materials do use fluid to keep them soft. Heat on the other hand and repeated heat cycling makes these components harden. Once they become rigid and are no longer pliable, they no longer apply pressure to the Teflon sealing rings they were expanding and the trans can experience internal leaks. Internal leaks create a loss of clamp force pressure at pistons acting on bands, clutch pack drums, and other components and here is where the trans begins to slip under load and burn those clutches and bands. As the fluid burns it fills with debris and soon after the valve body and solenoids act up as that debris is impairing their function. This is the beginning of the end for the trans.

Fresh fluid is nearly always a good thing throughout the life of trans. As in, after that initial 60 to 90K mi, a 25k fluid swap is GOOD THING! Do IT!
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Old 02-10-18, 12:58 AM   #47
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ive been using mine to deliver Chinese food, not really by choice. the Camry is like a pair of ice skates, so with the weather we been having i use the IS because it is amazing in the snow. the gas mileage isn't the best of course. im looking for something else , but for right now im using her.
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250 , change , fill , fluid , fluids , flush , is250 , lexus , lifetime , replace , tranny , transmision , transmission , trasmission , type

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