2008 Toyota Sienna LE Transmission

[wanttofish]

I am the original owner of a 2008 Toyota Sienna LE with 105,500 miles. Last time I did a transmission fluid drain and fill was at 43,500 miles. With all the pro and con information out there about doing a transmission fluid service, out there, should I do another transmission fluid drain and fill even though this is an older higher mileage vehicle? There are no transmission problems thank goodness. The vehicle has been driven normally and has been well maintained. Thank you in advance.

 

[HyundaiAbuser]

yes do a service

 

[martinq]

Do the transmission service ASAP. You can never get a transmission or its fluid "too clean". Find the "severe service" recommendations for your vehicle and use that as a guide.

 

[kschachn]

The old tale of a transmission fluid replacement causing failure just will not die.

 

[SShooterZ]

Do it.

 

[Whimsey]

The old tale of a transmission fluid replacement causing failure just will not die.

I don't know. I changed the ATF in our bought new 2017 Explorer with the 6F35 tranny and after changing the ATF at 10,000 miles, 20,000 miles and approximately every 25,000 miles there after the tranny died at 99,000 miles. If I left the factory ATF in for 150,000, as Ford recommends it would still be working. JUST KIDDING, , a poorly made tranny will die a bit later even with excellent care.

 

[JeffKeryk]

Service that bad boy! I would spill and fill for the next 2 or 3 oil change services.

 

[CleanSump]

To paraphrase Michael Jackson:
"You want it to stay alive, better do what you can
So change it, just change it

 

[randomhero439]

Anecdotally, I sold a 2006 Sienna with 266K miles on it for my parents. They undermaintained the vehicle. 7500-mile oil changes on conventional oil, never touched the transmission. Coolant, spark plugs, and the timing belt were all past due. Low on power steering fluid. The vehicle ran fine and didn't leak or burn engine oil. Shifting was normal. That vehicle impressed me with how little care it needed to carry on problem-free.

 

[slacktide_bitog]

Yes, it's worth changing the ATF again. Toyota makes it very easy

 

[tcp71]

The U151E in there has a drain plug and you refill through the dipstick. I average about 4.5 quarts when I drain and fill. Type T-IV or equivalent works fine. grab 5 quarts and do it. 105k miles is not high mileage for your transmission. Drain and fill it every 30k miles and it'll outlive the other parts of the van.