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post #16 of 19 (permalink) Old 03-18-2019, 09:15 PM
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Originally Posted by Joseph Sanders View Post
Thanks for the input. I got the PIDs from an FJ Cruiser Forum. I've been using it on my 4Runner and I simply plugged it into the Tundra and assumed it was correct. Maybe I should double-check the formulas with info posted on this forum, good call.

And yes, I was checking it while driving and it was staying closer to the 190s. I had cruise control and let it pull us up the hill at full power whenever it got up into the 220 and 230s. You are definitely correct that once it hit those Temps clearly a thermostat opened and dropped the temperature drastically in a hurry.
The base PIDs I am using originally came from a Tacoma Forum. Here are those formulas. See how they compare to the ones you are using.

For sensor 1 (Pan Temp):
OBD2 Mode and PID: 2182
Long Name: Transmission Pan Temp
Short Name: Trn Pam Tmp
Minimum Value: 0.0
Maximum value: 300.0
Scale factor: x1
Unit Type: F
Equation: ((((A*256)+B) * (7/100) 400)/10)
OBD Header to use: left blank

For sensor 2 (Converter outlet temp):
OBD2 Mode and PID: 2182
Long Name: Transmission Converter Temp
Short Name: Cnvtr Temp
Minimum Value: 0.0
Maximum value: 300.0
Scale factor: x1
Unit Type: F
Equation: ((((C*256)+D) * (7/100) 400)/10)
OBD Header to use: left blank

BTW, I seldom use the cruise control when climbing a hill (towing or not). I can control the Tundra throttle much better myself than the Cruise control can. It seems CC lets the speed drop a few MPH, then realizes it is going too slow and kicks in with higher RPMS and in some cases a downshift to get back up to the CC set speed. (not great for MPGs either) I can usually keep the RPMs in a tighter range manually and keep the tranny in overdrive longer which keeps the temps down somewhat. This is much easier to do when not towing.

FYI, I also used the Torque App in my old 2004 V8 4Runner especially when towing. IIRC I had to tweak that formula for the Tundra.

Charlie

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post #17 of 19 (permalink) Old 03-19-2019, 12:05 AM Thread Starter
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Originally Posted by charlier View Post
The base PIDs I am using originally came from a Tacoma Forum. Here are those formulas. See how they compare to the ones you are using.



For sensor 1 (Pan Temp):

OBD2 Mode and PID: 2182

Long Name: Transmission Pan Temp

Short Name: Trn Pam Tmp

Minimum Value: 0.0

Maximum value: 300.0

Scale factor: x1

Unit Type: F

Equation: ((((A*256)+B) * (7/100) 400)/10)

OBD Header to use: left blank



For sensor 2 (Converter outlet temp):

OBD2 Mode and PID: 2182

Long Name: Transmission Converter Temp

Short Name: Cnvtr Temp

Minimum Value: 0.0

Maximum value: 300.0

Scale factor: x1

Unit Type: F

Equation: ((((C*256)+D) * (7/100) 400)/10)

OBD Header to use: left blank



BTW, I seldom use the cruise control when climbing a hill (towing or not). I can control the Tundra throttle much better myself than the Cruise control can. It seems CC lets the speed drop a few MPH, then realizes it is going too slow and kicks in with higher RPMS and in some cases a downshift to get back up to the CC set speed. (not great for MPGs either) I can usually keep the RPMs in a tighter range manually and keep the tranny in overdrive longer which keeps the temps down somewhat. This is much easier to do when not towing.



FYI, I also used the Torque App in my old 2004 V8 4Runner especially when towing. IIRC I had to tweak that formula for the Tundra.
Thanks for the share. These are the same settings I have in Torque as well.

I agree, babying it instead of using cruise control will definitely keep the temps down, but these temps just seemed excessive given the small size of the hill and the low outside temperature.

I'll be keeping Torque running this summer as I do some towing!

Last edited by Joseph Sanders; 03-19-2019 at 01:40 AM.
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post #18 of 19 (permalink) Old 03-21-2019, 04:52 PM
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Those temps are 100% normal. My fluid stays around those temp unloaded or loaded to the limit as below. The temp of the fluid after the torque converter greatly depends on lock up, during normal driving your torque converter only locks up in 5th and 6th gear. So when climbing a small grade your truck kicks out of overdrive and your torque converter unlocks and temp climb fast, but the pan temp should only raise a degree or two.
When I pull this load I manually shift into fourth gear before every grade because our tranny will lock up the converter if 4th is manually selected. 4th gear has plenty of power to pull most grades with the converter locked up, which mean the tranny fluid stays between 190-200 even pulling up grades loaded.

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Last edited by seth lafleur; 03-21-2019 at 04:54 PM.
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post #19 of 19 (permalink) Old 03-21-2019, 05:37 PM Thread Starter
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Originally Posted by seth lafleur View Post
Those temps are 100% normal. My fluid stays around those temp unloaded or loaded to the limit as below. The temp of the fluid after the torque converter greatly depends on lock up, during normal driving your torque converter only locks up in 5th and 6th gear. So when climbing a small grade your truck kicks out of overdrive and your torque converter unlocks and temp climb fast, but the pan temp should only raise a degree or two.
When I pull this load I manually shift into fourth gear before every grade because our tranny will lock up the converter if 4th is manually selected. 4th gear has plenty of power to pull most grades with the converter locked up, which mean the tranny fluid stays between 190-200 even pulling up grades loaded.

Sent from my SM-N960U using Tapatalk
Wow, that is a great tid-bit of information right there. Thank you for the input!
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