Originally Posted By: Reddy45
Originally Posted By: BlakeB
On my Tacoma I use my ultragauge to check the fluid level at the proper temp. (97°-115°F) I jumped the two pins on the obd2 port (4,13)and started the temp check procedure and then plugged my UG back in the last time I did a pan drain and verified that the fluid was to be checked at 97-115, some people on the forums say that the range is 115-130, clearly it's not, at least not in my case.
Interesting find! I can't imagine there is a massive difference in fluid level if you check at 108*F vs at 125*F.
But one thing we can't confirm (I assume you maybe are a member over at TacomaWorld) is that the AT OIL TEMP light uses the same PIDs as the Ultragauge. On my Torque OBD app, I was able to get the Trans Pan and TC Outlet temps, but both were based on formulaic PIDs..
No, but what I can confirm is when the temp check light comes on and goes off for my vehicle. Now I don't need to put it into temp check mode to check the fluid level. It would be interesting to install an OBD2 splitter and see what techstream showed vs the ultragauge. What I can tell you is this, after my truck sits all night, the coolant and atf temps will be exactly the same at startup. For example, when I went to work yesterday I got in my truck after it had been sitting outside for 10 to 12 hours, the coolant and atf at the pan and TC were all 41°F.
Somebody checked on a 4runner and the difference in fluid level between the cool side of the temp check range and the hot side was about 6oz. 18 degrees in the temp check range and 6oz of fluid difference = 1oz per 3 degrees of temperature change.
I am on TW, 07 sport 4x4.
I have a few posts in the last few pages of this thread.
https://www.tacomaworld.com/threads/diy-full-flush-for-automatic-transmission.68462/page-41