Trans. Fluid Temp Guage

I am looking to install a Trans. Fluid Temp Gauge on my 2012 Tacoma. Does anyone have knowledge of the tread size at the Trans. Test port. I may need to order out a separate adapter and would like to do it at the same time I order the guage. I thought maybe someone else on this site may have already installed one. I'm ordering the Glowshift digital. Thanks in advance for your help.

 

Not a good place to check fluid temp.

 

For ATF temp, I'd tee in to the feed line going into the built-in radiator heat exchanger. If it's a V6, that should be the upper line on the driver's side of the radiator. If you bypassed that and went just with a larger external cooler, tee in to the feed line just before the cooler.

Otherwise, probably the best and most accurate place to tap ATF temps is the pan itself. That would require R&R the pan, welding in a bung (NPT!), installing your sender, wiring and gauge.


Beyond that, the ScanGuage II is a viable alternative. The A750 (again, assuming you have a V6) has 2 temp sensors built in. One covers fluid in the torque converter, the other senses fluid temps just before it's discharged into the pan. This is the solution I use (hey, let Aisin do most of the work for me!) and it is accurate within 2 degrees F of the fluid in the pan.

 

This ^^ there is no better place for a trans temp gauge or the OBDII. By the time you buy all the assorted stuff you can buy a scan gauge and just plug it in! If you have to have a cool looking gauge at least put the sensor in the pan if you really want to know what the temp is.

 

Thanks all. I have the 4cyl. Looks like I'll go with the scan guage II.
Makes the most sense.

 

There is a guy on another forum that did an inline temperature install here: I have done the same thing in the past on an '02 Tundra, and am going to do the same on my Tacoma, but I am going to use an AutoMeter manifold and a 1/2" to 1/8" adapter from SpeedHut. I also ordered the factory transmission cooler output line so that I can do the install on the bench and then just swap out the lines.

AutoMeter Temperature Manifold:


SpeedHut 1/2" to 1/8" Adapter:


Hope this helps someone else.
Ken

 

ELM327 bluetooth OBD adaptor, your phone + torque pro (if you are on android this is easily gotten for free).... custom PID for both transmission pan and tq converter output temp, boom 20 bucks and you have all sorts of information.

 

But will the torque app read trans temp on my 05 pre runner?
My truck doesn't have the temp check light in dash
Thanks