Noted 7AT Transmission Temps. (Street Driving)

Tractionless · 07-27-2021, 11:22 AM

I got sick of waiting for ECUTEK to add the .pid for transmission temperature logging etc., it's been years. I want to know temps. primarily to assist in the refill procedure, the same reason I installed a transmission dipstick.

I installed a Prosport oil temp. gauge sender in the OE hot line from transmission to cooler. It's positioned where the line enters the OE cooler; however, my OE cooler is no longer in service. Instead, I'm using a Hayden 676 core which is the exact unit Z1 repackages in their cooler kit. Btw, I only paid $30 for it on ebay. I'm running Valvoline Maxlife Trans. Fluid.

The core is mounted midship vertically between my Setrab oil cooler and the OE PS cooler and fed hot fluid from the top.

I put 7 hrs. drive time on the car this past weekend in 90*-93* temps. with heat indices around 105* and high humidity. Equal time was spend on both surface streets and freeway driving with wifey and luggage onboard cruising 80 mph on the freeway.

On the freeway the highest temp. I saw was 145* and "normal" was 140*-143*. Surface street temps. got as hot as 165* during stop-go and sitting at a red light. The temps. quickly drop below 145* once clean air begins blowing over the core again.

While I was unable to find a normal temp. range in the FSM the torque converter will only lock between 122* and 176* and I'm within that range.

THE BULL · 07-27-2021, 01:18 PM

The transmission has already a temperature sensor that can be read with Torque/OBD fusion without having to install anything.

In this aspect placement of the temp gauge will also affect readings.
I take the OEM one would read the highest of temps being that is placed internally in the valve body.

I ranged from 150-200 in the South FL summer with a small oil cooler depending on how much city driving I do.

DarkJak · 07-27-2021, 01:22 PM

Good info to know the converter only locks between those temps!
And to know what IS considered normal.

Do you have pics of the sensor location?

Spooler · 07-27-2021, 02:07 PM

Quote:

Originally Posted by THE BULL

The transmission has already a temperature sensor that can be read with Torque/OBD fusion without having to install anything.

In this aspect placement of the temp gauge will also affect readings.
I take the OEM one would read the highest of temps being that is placed internally in the valve body.

I ranged from 150-200 in the South FL summer with a small oil cooler depending on how much city driving I do.

Correct, pan temps will be hotter than hot line temps.

THE BULL · 07-27-2021, 02:23 PM

Quote:

Originally Posted by Spooler

Correct, pan temps will be hotter than hot line temps.

So the OP should be ranging in the same temps I probably was.
I utilized a small thermostatic cooler from a Lincoln truck.

Could use an upgrade however having one helped me stay in that range for longer time.

Rusty · 07-27-2021, 08:09 PM

The hottest temp is the line going to the cooler. As the fluid has already did it's work and picked up the temperature. The coolest temp is the line coming from the cooler back into the tranny. It has lost it's temp. The pan temp is about an avenge temp of the whole tranny. On my Power Wagon. I had placed the temp sensor in different locations over the years. I'm happy with it sitting in the pan for now. I've seen temps over 300F coming out of the tranny.

Tractionless · 07-29-2021, 10:14 AM

Quote:

Originally Posted by THE BULL

The transmission has already a temperature sensor that can be read with Torque/OBD fusion without having to install anything.

In this aspect placement of the temp gauge will also affect readings.
I take the OEM one would read the highest of temps being that is placed internally in the valve body.

I ranged from 150-200 in the South FL summer with a small oil cooler depending on how much city driving I do.

I know it has a temp. sensor and is why I commented I'm tired of waiting on ECUTEK to install the .pid into their firmware. Rather have the gauge I can glance at than have to jump back and forth with a different OBD2 port bluetooth/wifi between Torque and ECUTEK just to get one parameter.

Tractionless · 07-29-2021, 10:17 AM

Quote:

Originally Posted by Rusty;4004485[B

]The hottest temp is the line going to the cooler.[/B] As the fluid has already did it's work and picked up the temperature. The coolest temp is the line coming from the cooler back into the tranny. It has lost it's temp. The pan temp is about an avenge temp of the whole tranny. On my Power Wagon. I had placed the temp sensor in different locations over the years. I'm happy with it sitting in the pan for now. I've seen temps over 300F coming out of the tranny.

Exactly why I placed it in the hot line to the cooler.

From my research of the FSM, the trans. or other warning light won't come on until the temps. hit 356* in a 7AT!

Tractionless · 07-29-2021, 10:18 AM

Quote:

Originally Posted by DarkJak

Do you have pics of the sensor location?

The sensor is on the driver side frame rail adjacent to the OE transmission cooler inlet on the top of the radiator.

07-27-2021, 11:22 AM	#1 (permalink)
Tractionless A True Z Fanatic Join Date: Jan 2016 Location: Atlantic SE Posts: 1,237 Drives: '10 K23 ST 7AT Rep Power: 30525	Noted 7AT Transmission Temps. (Street Driving) I got sick of waiting for ECUTEK to add the .pid for transmission temperature logging etc., it's been years. I want to know temps. primarily to assist in the refill procedure, the same reason I installed a transmission dipstick. I installed a Prosport oil temp. gauge sender in the OE hot line from transmission to cooler. It's positioned where the line enters the OE cooler; however, my OE cooler is no longer in service. Instead, I'm using a Hayden 676 core which is the exact unit Z1 repackages in their cooler kit. Btw, I only paid $30 for it on ebay. I'm running Valvoline Maxlife Trans. Fluid. The core is mounted midship vertically between my Setrab oil cooler and the OE PS cooler and fed hot fluid from the top. I put 7 hrs. drive time on the car this past weekend in 90-93 temps. with heat indices around 105* and high humidity. Equal time was spend on both surface streets and freeway driving with wifey and luggage onboard cruising 80 mph on the freeway. On the freeway the highest temp. I saw was 145* and "normal" was 140-143. Surface street temps. got as hot as 165* during stop-go and sitting at a red light. The temps. quickly drop below 145* once clean air begins blowing over the core again. While I was unable to find a normal temp. range in the FSM the torque converter will only lock between 122* and 176* and I'm within that range. DarkJak, Memphis370Z and jchammond like this. __________________ Toys Not Tots

07-27-2021, 01:22 PM	#3 (permalink)
DarkJak A True Z Fanatic Join Date: Jun 2011 Location: Madison, WI Posts: 1,390 Drives: 2009 370Z Rep Power: 13448	Good info to know the converter only locks between those temps! And to know what IS considered normal. Do you have pics of the sensor location? __________________ @stupidtoycars \| My track vids 09 7AT\|MCS 2WNR\|Topgunz Rotrex\|Ecutek (Eugene)\|Maxxis RC1\|Titan-7 TS-5\|OSG LSD\|Rear Mount Derale Oil Cooler (WIP)+25 Trans Cooler\|Fismo\|G-LOC R12/R10\|Zeta III L\|NLR Wing and Splitter\|CJM Pan and Fuel Hat\|Radium Surge Tank\|AP Racing CP9668

07-27-2021, 08:09 PM	#6 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,851 Drives: 2011 Nismo GM 6M Rep Power: 2684436	The hottest temp is the line going to the cooler. As the fluid has already did it's work and picked up the temperature. The coolest temp is the line coming from the cooler back into the tranny. It has lost it's temp. The pan temp is about an avenge temp of the whole tranny. On my Power Wagon. I had placed the temp sensor in different locations over the years. I'm happy with it sitting in the pan for now. I've seen temps over 300F coming out of the tranny. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

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07-27-2021, 01:18 PM	#2 (permalink)
THE BULL Base Member Join Date: Apr 2021 Location: Florida Posts: 217 Drives: G37S Rep Power: 26848	The transmission has already a temperature sensor that can be read with Torque/OBD fusion without having to install anything. In this aspect placement of the temp gauge will also affect readings. I take the OEM one would read the highest of temps being that is placed internally in the valve body. I ranged from 150-200 in the South FL summer with a small oil cooler depending on how much city driving I do.