First official post here. Thanks to all for the valuable info.
Disregarding the "official" manufacturers must use the WS fluid statement, what is actually special about Toyota WS fluid?
I have read here it is synthetic.
I have read here it is not synthetic.
I have read it is inferior to Dexron VI.
Can not find out if it has a some form of friction additives.
Some have stated it is a simple low viscosity ATF.
Others have mentioned that other fluids are more than capable, but not submitted for the Toyota WS endorsement.
I have used Mobil 1 ATF in other applications before. It is not approved for WS applications. It is slightly more viscous. Does it have some type of additive that would benefit or harm the transmission?
The reason I ask, my 2010 Tacoma shifts very soft, but is deemed normal. Also, the torque converter at under 10 mph, gets confused. Sometimes you get a lot of slip and little movement, other times it drives like a normal automatic that will creep along when needed.
The dealer has seen the truck under warranty. The mapping and revision status of the transmissions electronic program are current. Basically explained this is normal and not broken.
So disregarding all the Toyota or Mobil approved / unapproved stuff.
How do these fluids compare?
Other than viscosity what is really the difference?
Thanks
PK
Disregarding the "official" manufacturers must use the WS fluid statement, what is actually special about Toyota WS fluid?
I have read here it is synthetic.
I have read here it is not synthetic.
I have read it is inferior to Dexron VI.
Can not find out if it has a some form of friction additives.
Some have stated it is a simple low viscosity ATF.
Others have mentioned that other fluids are more than capable, but not submitted for the Toyota WS endorsement.
I have used Mobil 1 ATF in other applications before. It is not approved for WS applications. It is slightly more viscous. Does it have some type of additive that would benefit or harm the transmission?
The reason I ask, my 2010 Tacoma shifts very soft, but is deemed normal. Also, the torque converter at under 10 mph, gets confused. Sometimes you get a lot of slip and little movement, other times it drives like a normal automatic that will creep along when needed.
The dealer has seen the truck under warranty. The mapping and revision status of the transmissions electronic program are current. Basically explained this is normal and not broken.
So disregarding all the Toyota or Mobil approved / unapproved stuff.
How do these fluids compare?
Other than viscosity what is really the difference?
Thanks
PK