I started on my transmission temperature gauge install last night - did all the wiring so that I can install both the sender and the gauge itself. Sender will be going on in a brass t-fitting I got (splicing into the "out" line of the transmission) once I do the ATF drain and fill (maybe tonight if I get a chance).
The transmission is an Aisin U151E, mated to a 3MZ-FE in a Toyota Sienna. The shop manual states the following, with respect to checking the fluid level:
"Drive the vehicle so that the engine and transaxle are at normal operating temperature.
Fluid temperature: 70 - 80 °C (158 - 176 °F)"
That's the "normal" range, but what is too hot that I need to worry about the ATF degrading too quickly leading to transmission failure. 177°F? 200°F? If say 180°F is in reality on the high side, but otherwise safe, I don't want to be panicking because it is over the 176°F.
Guessing the temperature ATF degrades rapidly at is pretty much the same across ATFs and transmissions.
Fluid used, btw is T-IV/JWS3309.
The transmission is an Aisin U151E, mated to a 3MZ-FE in a Toyota Sienna. The shop manual states the following, with respect to checking the fluid level:
"Drive the vehicle so that the engine and transaxle are at normal operating temperature.
Fluid temperature: 70 - 80 °C (158 - 176 °F)"
That's the "normal" range, but what is too hot that I need to worry about the ATF degrading too quickly leading to transmission failure. 177°F? 200°F? If say 180°F is in reality on the high side, but otherwise safe, I don't want to be panicking because it is over the 176°F.
Guessing the temperature ATF degrades rapidly at is pretty much the same across ATFs and transmissions.
Fluid used, btw is T-IV/JWS3309.