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165 is great. I think it has to be way over 200 to start causing damage.
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trans temp
What is the normal, not towing temperature for the automatic transmission? Mine was 165° the other day and I thought that was high.
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160-170ish is generally where they run.
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I am not sure how accurate my gauge is because I run an OBD II bluetooth port with the Torque app but I show about 200 during normal highway driving. Last weekend in western Arkansas on the trail we had some LONG climbs up hills. I showed as high as 225 but the hot oil light never came on.
I re-geared this week from 3.21 (I have HEAVY 35" tires and wheels) to 4.56. I am expecting that will help with trans temp since I won't be kicking down into 3rd at 70 MPH as often now.
I re-geared this week from 3.21 (I have HEAVY 35" tires and wheels) to 4.56. I am expecting that will help with trans temp since I won't be kicking down into 3rd at 70 MPH as often now.
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That is high okstatejk-I would question your gauge. Those sound more like coolant temps - are you sure your gauge isn't reading that instead? I have never seen anything over low 170ish even crawling 4lo at over 100 degrees outside temp. Even the few times I wheeled heavy 37s on 4.10 I stayed in the same range.
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No, it's trans fluid temp. I watch the coolant temp on the same screen as the trans temp. I also watch air intake temp on that screen. It is probably just not accurate on the trans temp since I think the hot oil light comes on at 220 trans fluid temp and you go into limp mode.
I am guessing my coolant temp and air intake are right though.
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No worries, you're normal.
On occasion I'll hit 185 towing, I've hit 200 wheeling in sand. HOTOIL light comes on around 230-240 I believe.
Also FWIW when the transmission is in PARK or NEUTRAL, the TCM will substitute the engine temperature for the ATF temperature.
On occasion I'll hit 185 towing, I've hit 200 wheeling in sand. HOTOIL light comes on around 230-240 I believe.
Also FWIW when the transmission is in PARK or NEUTRAL, the TCM will substitute the engine temperature for the ATF temperature.
I have noticed this too. Thanks for the explination! Will be towing a pop up about 400 miles tomorrow! On my way from near Austin to Davis Mountains.
Go to your profile. There should be a view content link.
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I am using the Torque App for andriod and this OBD II bluetooth receiver. It seems to work pretty well minus the trans temp. But as was posted above, it is apparently not getting the trans temp from the correct place.
http://www.amazon.com/Vgate-Bluetooth-Scanner-TORQUE-ANDROID/dp/B00AAOOQJC
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I am glad to see this post. While sitting at idle my transmission temps were climbing and I watched until it hit 228 before it started to decline. I was a little worried but wanted to see how high it would go.
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:thumb:
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I use a different OBD scanner and run Torque as well, mine shows the Trans temp is unavailable. You're not the only one looking for where it is.
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If you check out the http://www.wranglerforum.com/f202/hacking-the-obd-ii-diagnostic-port-1113194.html thread you can find a couple of PIDs that report the transmission temp. Mode $21 and PID $5C works.
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Wow, very informative. Thanks for the excellent write-up.
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