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AW71 trans temp monitoring

hessam69

Well-known member
Joined
Jun 19, 2009
Location
Sydney, Australia
Has anyone done some tests on their AW71 to see what temps they are actually getting?

I don't have a trans cooler, and before I get one I'd like to know if it's needed. Also, has anyone successfully used the pressure test ports on the left side of the case to stick the probe in? I think that would be the neatest way, but I might need an adaptor for the difference in thread size.

I'm going to be raising the boost so it would be good to measure temps before and after mods and at the dragstrip too

Also can you recommend a temp gauge kit?

Thanks in advance
 
I am interested to see what you come up with, and have debated this myself. Simplest solution I came up with would be an in-line sender in the cooler lines.

I went ahead and did a divorced air-to-oil trans cooler, as I'm yet to find an automatic transmission from the 80's and 90's that wouldn't benefit from a proper transmission cooler.
 
Yes the car is stock, for now

I wanted to get an idea of the maximum fluid temp the way I drive the car in the Australian summer we have. Then when I record the highest temp, I can turn up the boost and do the other mods and monitor the temp again.

I was thinking, it would be a neat way to tap into the fluid by inserting the probe into one of the fluid pressure test ports on the left side of the transmission case, that way the direct working pressure will be passing over the probe, and the temperature there will be at working pressure, not what is in the cooling lines or the pan. This way the probe is sitting horizontally not vertically.
 
Ideally you want the sensor to be installed in the oil pan but if you are able to match the thread to one of the plugs in the case that would be easier and still give you a basic idea of what's happening. 200F or about 93C is probably the start of the red zone. I personally love VDO gauges, they make M10-1.0 threaded temp sensor - don't know what kind of threads AW71's ports have.
 
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pan or cooler outlet to radiator are the places you want the sensor. somewhere where fluid moves, not where it stagnates
 
The standard ATF cooler lives in the radiator.

My point is, I am trying to find at which temperature the standard cooler becomes too ineffective, getting the fluid too hot which means adding an external cooler becomes necessary.
 
Quote: pan or cooler outlet to radiator are the places you want the sensor. somewhere where fluid moves, not where it stagnates

Putting the sensor in the pan in a possibility, but cutting into the cooler line is something I'm trying to avoid. Unless there is a way to make an adaptor to fit into the cooler outlet thread, as well as keeping the metal line installed also
 
As a person who is curious and suffers from OCD, I would like to know if the fluid is getting hot enough (in my climate) where an external cooler is necessary.
 
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