![]() 0 failed automatic transmission due to not changing the fluid.īMWs and Mercedes break down a lot more often because they're both significantly less reliable brands than Lexus. We've not only got the guy with 250k, but a LOT of members over 100k. LOL, it's fun and nerdy to think about it.Your assumptions have some flaws.įirst you assume you actually need to change it. Cost 10*4.3=$43+ maybe 4~5 hrs because you need to run for a short distance to well mix the fluid before you drain it out again. My assumption based on 1 liter drain out/ time compared to 7.2 liter total volume. Assume that your mixing the oil and new fluid well, it takes around 4.3 times to replace 50% of the fluid. In conclusion, I think that Lexus has done their cost analysis and purposely implemented "lifetime" transmission fluid as the way to shorten ownership life of their vehiclesI was gonna reply to this post, but i'll just let Kurtz do it because something tells me his reply will be betterĪnticipating great reply. In conclusion, I think that Lexus has done their cost analysis and purposely implemented "lifetime" transmission fluid as the way to shorten ownership life of their vehicles On top of that, if you look into the transmission filter part, it share the same part as the rav/ camry, both of which have 10-15k recommended transmission fluid change. I found out that even though on paper it said so, but all bmw technician preferred to change it around 50k or even more often if you intended to keep the vehicle longer.Īnd the matter of fact is cost of 1 quart of Toyota WS standard oil is just $3 more than a type IV, tells you that it's arguably any special than a conventional toyota type IV fluid. I personally owned an BMW z3 that claimed lifetime transmission, and suffered cranking noise at 83K. For instance, if anyone of us has own a BMW or a Mercedes all known their immature breakdown of transmission around 80K. But as you know engineers often do not have a strong voice in designing a product that will not profit their company. *: The fluid capacity is provided as a reference. New fluid would probably cause more problem as it's new found detergen capability may dislodge contaminants into the system. Lifetime fluid, means lifetime of the transmission, granted, this may be a lot longer than what most intend to keep the car, but realize that some people buy cars for the long haul, and for those, fluid change started early, and often is the best bet.Ĭaution: If you already have high mileage on your existing transmission without having done any fluid change, you will be bettter off leaving well enough alone. It is tedius and expensive even as a DIY. Doing this until at least 80% of the capacity has been replaced. A drain / fill cycle can be done by removing the pan and topping what was removed. Here is the full capacity for the Transmission fluid. ![]()
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