What's up from JB91runner,
I'm installing a trany cooler and thermostat. Would like to know if someone could advise me on where I can fit the sending unit directly on the trany? I have a brass t-adapter set up for an inline application, but would rather have a direct temp from source.
if inline recomended, which line is the in, and which is out?
Thanks in advance, JB
91 runner 3.0 auto

 

You need to keep the factory thermometer (sensor) it governs the overdrive engaging.

The factory temp sender should be apparent when looking at the trans, it has no moving parts the other bits are gear selection switch and have moving parts. There is also a speed sensor located near the rear..

 

The most important temperature for controlling an auxiliary cooler fan is that of the fluid coming out of the transmission going to the stock cooler since that is the highest temperature.
I would recommend using the t adapter. To find the outlet just disconnect one of the hoses near your radiator and point both at a catch pan, start the engine briefly and see which side has fluid coming out and follow it back to the tranny.
I did the same with mine adding an additional cooler, but no fan, and I would recommend keeping the stock cooler and just add in the new one on the return side.

 

So i installed the trany temp guage. Looks great, but can't get the friken thing to work... All connects are good. Installed between the trany hose exiting the metal hose exiting the trany.
the only thing I can think of is that the sending unit would be grounded if coming straight out of the trany. Do I need to ground the body of the brass t connector the sending unit is installed in? As it's between two rubber hoses... is the fluid conductive enough for a ground? Am I just an idiot? I don't know.

 

Yeah it needs ground. Tapered threads shouldn't need tephlon tape just run them in till they are tight they are slightly V shaped..

 

Good to know...thats probably why it's leaking a bit. So i will ground it and see...Thanks for the advice

 

Ps I'm a landscaper, I see threads, I think tef.

 

All tapered threads need either teflon tape or pipe dope. It lubricates the thread to get proper make-up, and it provides a little extra sealant for when threads aren't perfect.

It's the the straight threads (compression fittings, flared fittings, fittings that have a rubber seal, ...) that don't take tape or dope.

And co_94_PU is correct; transmission fluid is actually a good insulator, so you'll need to ground the sensor to make a circuit.

 

Your gauge is mounted in a plastic panel, do you have it grounded?

 

So on the first, used Teflon the first time...threaded 80%+ and leaked just enough to look wet, uppn pulling apart i found the Teflon was red and soaked through. Took advice and used nothing and leaks like a siv. Threads are standard fip. Will try the dope, always works for me, lol.
As for the ground, no where to connect to. Will pick up a ring connector and place between fittings.
And lastly, to answer AK Runner, the unit has a wired ground terminal.

 

Thanks for all the help again...All is working great, no leaks. Used Permatex high temp thread sealant ($15). Good ground...All Good, JB