Quote:
Originally Posted by RonJR
Calling the Toyota transmission "sealed" is a bit of an overstatement. It's no more "sealed" than your differential or your transfer case. It has a drain plug, a fill plug, a check plug, and a breather to equalize pressure to keep from blowing out the seals. It just doesn't have a dipstick or a convenient way to fill it from the top through a funnel. Basically Toyota reconfigured it so that servicing it is much like servicing your diff or tcase, although because of the torque converter it's harder to drain out all the fluid. But that applies to the older auto transmissions with dipsticks as well.
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That’s a fair point. If anyone has a better term for a no-dipstick design, fire away.
Interestingly, that oracle of knowledge called the owner’s manual
doesn’t say not to change the fluid:
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AUTOMATIC TRANSMISSION
Fluid capacity (drain and refill), L (qt., Imp. qt.):
Up to 3.0 (3.2, 2.6)
Fluid type:
Toyota Genuine ATF WS
Change automatic transmission fluid only as necessary.
Generally, it is necessary to change automatic transmission fluid only if your vehicle is driven under one of the Special Operating Conditions listed in your “Scheduled Maintenance Guide” or “Owner’s Manual Supplement”. When changing the automatic transmission fluid, use only “Toyota Genuine ATF WS” (ATF JWS3324 or NWS9638) to aid in assuring optimum transmission performance.
Notice: Using automatic transmission fluid other than “Toyota Genuine ATF WS” may cause deterioration in shift quality, locking up of your transmission accompanied by vibration, and ultimate- ly damage the automatic transmission of your vehicle.
Please contact your Toyota dealer for further details.
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