Which is the outlet from the transmission?

[MikePL]

I need to make a temp gauge for the transmission and therefore I need to monitor the outlet of the ATF fluid. I would like to splice in around the transmission cooler, but...

1. Which cooler hose is the outlet from the transmission? Lower one or upper one? I need to measure fluid before it gets cooled obviously.
2. Does the ATF exit the transmission towards the cooler first or towards the heat exchanger in the radiator first? The second scenario would complicate stuff.

 

[Kernal]

Which model/year 80 Series do you have?

 

[MikePL]

97 lx450

 

[Kernal]

For the 1FZFE engine and A343F ATM, the out (hot) line is the top cooler line of the pair of hard lines that run along the left lower side of the block. When you look at the pipes it makes sense as the top pipe is bent about 45 degrees pointing over toward the right side of the radiator where the line runs via a rubber hose. After the fluid runs through the "cooler" inside the bottom of the radiator it then leaves the left side of the radiator and runs to the auxilary cooler, then returns to the bottom transmission cooler pipe on the left side of the block.

Look for this hose (longest hose coming off the cooler pipes)
Right side in this photo attaches to the top pipe (which has a 45 degree bend)
Left side in this photo attaches to the 10mm OD pipe nipple on the right lower aspect of the radiator:

Previous discussion:

Post in thread '80 Series Transmission cooler lines, In and Out?'

Jun 21, 2024

G’day guys,
I’m in the process of installing an Auto transmission temperature gauge in my 1997 80 series. I’m trying to figure out which is the inlet hose to the auto trans cooler at the front so i can read off the hot side. Any help would be appreciated!

There is a temp sensor on the output of the transmission. Follow the line to the cooler.

• jonheld

• 

Related thread:

Thread '100 SERIES and LX470 PIDs & ODB2 gauges.'

Apr 24, 2017

Hey guys, i got a bluetooth odb2 reader and downloaded both the torque pro and dash command apps, ive been doing a bunch of searching around trying to find a good list of PIDs for us, not really having much luck and not really having a great understanding of PIDs in general is making this a struggle...

1. Are PIDs year specific, generation or brand? I see people using PIDs from corollas on tundras and such...is that more or less a hack/work around or is that normal?

2. Anyone got a list or can at least explain to me exactly what I am looking for?

This is for a 2000 LX470.

Here's a list...

• THEIZZARDKING
• 100 series lx470 series
• Replies: 60
• Forum: 100-Series Cruisers

• 

And another:

Post in thread 'Digital Trans Temp Gauge Install........'

Jan 19, 2024

I chose the pan location because I believe it represents the best overall core temperature. I don't see the value in monitoring short term temperature 'spikes' or cycles (Hot when coming out of the Torque Converter, Cooler in the return line). The fluid in the pan provides the most stable temperature reading. We already know that fluid in the T/C before it locks up is HOT, there really is no need to know how hot that 'spike' is. IF it is too great..it will be reflected in the pan temperature reading (albeit more slowly). Likewise...we don't need to know how COOL the fluid is upon...

• rannon

Are you using something like this:

Analogue Transmission Temperature Gauge to suit Toyota Land Cruiser 80

LEAD TIME 1 - 2 WEEKS Don’t wait until it’s too late! A real-time readout Transmission Temperature Gauge, picking up the temperature of the oil at its hottest point is the cheapest form of insurance you have against total transmission failure. If something was to go wrong with your transmission...

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