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So I guess I am a bad owner because I have yet to ever do a transmission fluid flush on my 2006 Tundra. It has 150,000 miles on it now. Every time I get the truck serviced the fluid is checked and every time its perfectly clean and clear.

Then someone told me it should had been changed at 100,000 KM! I assume they were wrong and meant miles in any case I am way over.

Not experiencing problems or anything but nothing lasts for ever.

Whats the longest someone has gone which doing a flush? If they can hook up their machine they said it would take about 45 minutes but if they cant then its drain, fill, drain, drive, drain fill to get it done.
 

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Here's a link you may find informative . . .

 

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I usually see 2 trains of thought. Those who change it regularly 30-50k and those who never change it.

If I bought the vehicle from someone else not knowing how it was driven I’d probably not change it if was over 100k miles and it showed signs of not being changed only because some of the clutch material may be in the fluid which actually helps to prevent it from slipping. You sometimes run into a situation where introducing new fluid depletes the old fluid with the material and the tranny begins to slip or you could get lucky and nothing happens.
I


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Dear Car Talk:
My 2000 Jeep Cherokee needs fresh transmission fluid. What would your honest answer be about the benefits of “flushing” the transmission versus a transmission fluid “change”? — Francois
Well, I wouldn’t flush the whole transmission yet, Francois. But you should flush the transmission fluid.
When you just remove the drain plug and rely on gravity to remove your transmission fluid, only a little more than half of it comes out. All of the dirty fluid that’s sitting in the torque converter, and many of the passages, just stays there and contaminates the new fluid.
So a flush is a better alternative. We use a machine at the garage that connects to the transmission cooler lines. And, while the engine is running, it sends new fluid in and captures the old fluid coming out.
And because it pushes out the old fluid with the new fluid, you get a complete change of fluid. If your transmission holds, for example, 14 quarts of transmission fluid, 14 new quarts go in and 14 old, dirty quarts come out.
It costs about twice as much as just opening the drain plug, but it’s at least twice as good.
If you’re going to the trouble of changing the transmission fluid, you might as well actually change all of it, right?
Post questions online at CarTalk.com.
 

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The local AAMCO shop did a complete flush of the AT on my wife's car for $99, on sale a few month ago. Might be more for the thirsty Tundra and they don't use Toyota AT Fluid. It's been advised to replace fluid with a full synthetic on this site. Watch for a coupon. Chap
 

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Had my 2001 Tundra flushed and new filter at a reputable shop a few months back. 14 qts of synthetic ATF @ $7 ea, filter kit $46 and $80 labor for a grand total of $220. I'm at 155k on the odometer. I figure I'm good for another 150k since I no longer tow anything.
 
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