Anyone running the Tru-Cool 4589? What temps do you see?

[jross20]

Update time guys.

Two for the past couple of times that I've tested it, my temps seemed to hover between 140 to 175. The very rarely I will see the number spike to 350-400 for about 1 second. I'm assuming this is just some kind of a glitch or blip?

 

[Bad Luck]

Update time guys.

Two for the past couple of times that I've tested it, my temps seemed to hover between 140 to 175. The very rarely I will see the number spike to 350-400 for about 1 second. I'm assuming this is just some kind of a glitch or blip?

The flash point of Dexron 3 is 400 degrees Fahrenheit. I'm going to assume its a glitch. You probably have an intermittent bad sensor or possibly a wiring issue on that circuit. It could also be a poor connection at the sensor if you're lucky.

Edit: I'm running a Tru-Cool 4589 on my 2000 and monitor trans temp via Ultra-Gauge. I have yet to get over 190 degrees. City driving is definitely higher temps than highway driving. Mine is mounted on the passenger side of the condenser with the pass through zip ties that came with it. FYI there is a thermostatic bypass (functions similar to a thermostat) built into this model. I'm entirely bypassing the radiator.

 

[TonyB66]

The flash point of Dexron 3 is 400 degrees Fahrenheit. I'm going to assume its a glitch. You probably have an intermittent bad sensor or possibly a wiring issue on that circuit. It could also be a poor connection at the sensor if you're lucky.

Edit: I'm running a Tru-Cool 4589 on my 2000 and monitor trans temp via Ultra-Gauge. I have yet to get over 190 degrees. City driving is definitely higher temps than highway driving. Mine is mounted on the passenger side of the condenser with the pass through zip ties that came with it. FYI there is a thermostatic bypass (functions similar to a thermostat) built into this model. I'm entirely bypassing the radiator.

FWIW, I have another make bar & plate of the same dimensions (8x11x1.5) and have and I've seen about the same, highest around 180 or so and that was momentarily. I'd say 90% of the time has been 140-170, the remaining time is the warming-up period to those temps.

My ATF has seen markedly lower temperature peaks and more so overall average temps. This should greatly help with the quality and life of the fluid. I also added a Magnefine filter at the time, so I'm feeling pretty good about the tranny these days...

 

[jross20]

Strangely enough the temperature is the highest on the highway, and drops during city driving.

I also noticed that the a340 becomes butter smooth at 170-175° F. Now it's definitely not rough or jerky below that temperature, but you can really feel the shifts. I'm not sure if this is fine or if I need to let her stay around 170° F.