Quote:
Originally Posted by Lester Lugnut
Because it's not lifetime fluid.
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When was the last time you had or read about an A750F going bad? Most transmission shops have never seen one. You can change the fluid every week or never, the results will be the same. There's no reason to ever change it unless you get water in it somehow or your overheat the transmission somehow. Both of those are really hard to do. That's why Toyota doesn't recommend changing it ever for most people.
This is a quote from TSB-0006-11 (I added the bold and underline, Toyota capitalized "NOT".)
World Standard Automatic Transmission Fluid
Required Tools & Equipment
SPECIAL SERVICE TOOLS (SST) PART NUMBER QTY
Transmission Fill System* 00002-11100-02 1
* Essential SST.
NOTE Additional SSTs may be ordered by calling 1-800-933-8335.
Important Information
• 100,000 Mile Maintenance Interval —
Inspection only; ATF-WS does NOT require any flushing or changing during the life of the vehicle.
• The use of Genuine Toyota ATF-WS is recommended.
• The use of additives or aftermarket fluids that are considered compatible or substitutes may result in shift concerns and damage to the internal transmission components.
• ATF-WS is NOT compatible with T-IV or Dexron ATF.
• Containers storing Toyota ATF-WS should ALWAYS be sealed — If exposed to the atmosphere, ATF-WS may absorb moisture and potentially cause shift concerns if used in operation.
• One time use only.
• When performing repairs on ATF-WS equipped transaxles, it is important to use only new, clean ATF-WS when refilling the ATM.
• ATF-WS equipped ATMs may use the overflow type procedure — Any fluid drained from the overflow plug should be discarded following proper local regulations and never reused. Failure to do so could result in shift concerns and damage to the internal transmission components.