hey all!
I will be changing the fluid in my u760 tranny from toyota soon. It calls for Toyota WS fluid but I did some research and came upon these points.
As we all know Aisin makes the tranny for these and they have there own AISIN fluid called Aisin 0WS.
Toyota also makes a fluid that we all know of called Toyota WS however I did some research and found some old sds/pds for the Aisin fluid and it states:
Aisin 0WS
@40C= 34.88 cSt
@100C = 7.332 cSt
The Toyota WS states:
@40C = 23 cSt
@100c = 5.45cst
Most people are using Toyota fluid since that is what came in our cars I assume at production ? and or is easy to get from dealers etc. However we will never know if ‘Toyota’ is using the lighter/thinner fluid to help with ‘CAFÉ’ requirements or if the Toyota trannys want thinner fluid. However I feel like it is a fair assumption to assume the Aisin fluid is the real fluid and those specs are probably prioritizing longevity and protection
I further did more research and it seems like the most common Toyota ws replacement fluid has been Maxlife ATF with amazing feedback from so many forums / reviews. The fluid specs are below:
Maxlife ATF
@40C = 27.6 cSt
@100c = 5.88cst
Just basing on the above specs, it can easily be seen why people are having amazing results with Maxlife as a replacement to Toyota WS as it is so close to the Toyota fluid viscosity at both temperatures.
However I feel like there is a better aftermarket fluid and that is Castrol Transmax CVT/ATF with the specs below:
Castrol Transmax CVT/ATF
@40C = 34.2 cSt
@100c = 7.1 cst
As you can see this fluid is very very similar to the OEM Aisin fluid and since it is a newer fluid not many people have used it but have read on other forums that it is being recommended for this application and now you can see why. The viscosity is almost identical to Aisin WS with the benefit of being confidently full synthetic
The U760 also in the early years had torque converter shudder issues and the thicker Castrol fluid mitigated the issue more compared to Maxlife and other fluids from feedback from members from diff forums who used this fluid as a replacement
So now the question is, is Castrol Transmax CVT/ATF the way to go for fluid replacements compared to Toyota WS or is there still reason to use the thinner Toyota fluid?
I feel like by the time that people are looking to change fluid, there is probably already enough wear in the tranny to recommend the usage of OEM Aisin 0WS or Castrol Transmax.
*I know some of my research coincided to other threads on bitog/forums so I don’t take credit for any of this, thanks for all the help from other members / forums*
I will be changing the fluid in my u760 tranny from toyota soon. It calls for Toyota WS fluid but I did some research and came upon these points.
As we all know Aisin makes the tranny for these and they have there own AISIN fluid called Aisin 0WS.
Toyota also makes a fluid that we all know of called Toyota WS however I did some research and found some old sds/pds for the Aisin fluid and it states:
Aisin 0WS
@40C= 34.88 cSt
@100C = 7.332 cSt
The Toyota WS states:
@40C = 23 cSt
@100c = 5.45cst
Most people are using Toyota fluid since that is what came in our cars I assume at production ? and or is easy to get from dealers etc. However we will never know if ‘Toyota’ is using the lighter/thinner fluid to help with ‘CAFÉ’ requirements or if the Toyota trannys want thinner fluid. However I feel like it is a fair assumption to assume the Aisin fluid is the real fluid and those specs are probably prioritizing longevity and protection
I further did more research and it seems like the most common Toyota ws replacement fluid has been Maxlife ATF with amazing feedback from so many forums / reviews. The fluid specs are below:
Maxlife ATF
@40C = 27.6 cSt
@100c = 5.88cst
Just basing on the above specs, it can easily be seen why people are having amazing results with Maxlife as a replacement to Toyota WS as it is so close to the Toyota fluid viscosity at both temperatures.
However I feel like there is a better aftermarket fluid and that is Castrol Transmax CVT/ATF with the specs below:
Castrol Transmax CVT/ATF
@40C = 34.2 cSt
@100c = 7.1 cst
As you can see this fluid is very very similar to the OEM Aisin fluid and since it is a newer fluid not many people have used it but have read on other forums that it is being recommended for this application and now you can see why. The viscosity is almost identical to Aisin WS with the benefit of being confidently full synthetic
The U760 also in the early years had torque converter shudder issues and the thicker Castrol fluid mitigated the issue more compared to Maxlife and other fluids from feedback from members from diff forums who used this fluid as a replacement
So now the question is, is Castrol Transmax CVT/ATF the way to go for fluid replacements compared to Toyota WS or is there still reason to use the thinner Toyota fluid?
I feel like by the time that people are looking to change fluid, there is probably already enough wear in the tranny to recommend the usage of OEM Aisin 0WS or Castrol Transmax.
*I know some of my research coincided to other threads on bitog/forums so I don’t take credit for any of this, thanks for all the help from other members / forums*
