Remote Tranny Cooler installed...Now-question.

WWDiesel · **Posted:** Sat Apr 23, 2022 6:04 pm

Yes, there is about a 15-20 degree difference between the hot fluid leaving the transmission going to the cooler versus the temperature of the fluid in the pan.
I have an inline sensor on a "Tee" block on the hot fluid line going to the coolers and a sensor in the side of the PML oil pan.
I wired them to a switch (DTDP) so I could switch from one sensor to the other on the fly using only one gauge (Glowshift).
And I routinely see the 15-20 degree temperature difference between the two sensors when at normal operating temperatures.
The pan is always cooler!

taroo · **Joined:** Sun Apr 27, 2008 2:14 pm **Posts:** 259

Another great idea. My remote Derale 13740 has the dual fan temp sensor switch which Derale says is calibrated for 180 degrees. My fluid pan temp sensor in the bung is a GlowShift. I can install a Tee with another GlowShift sensor and the switch arrangement you provided.

I need confidence that the transmission is not going to overheat now that I have abandoned the factory cooler in the radiator for the remote dual fan Derale.

What should the fluid in the pan be after running for a long period? I have not run for a long period so am curious what yours runs.

Also, do you know what temperature the built-in transmission temperature light in the dashboard comes on?

WWDiesel wrote:

Yes, there is about a 15-20 degree difference between the hot fluid leaving the transmission going to the cooler versus the temperature of the fluid in the pan.
I have an inline sensor on a "Tee" block on the hot fluid line going to the coolers and a sensor in the side of the PML oil pan.
I wired them to a switch (DTDP) so I could switch from one sensor to the other on the fly using only one gauge (Glowshift).
And I routinely see the 15-20 degree temperature difference between the two sensors when at normal operating temperatures.
The pan is always cooler!

WWDiesel · **Posted:** Sat Apr 23, 2022 11:11 pm

The highest I have seen the temperature in summer while towing in the oil pan is 180-200. Line temperature gets much hotter.
But keep in mind, I have the factory cooler, a 10 plate stacked Derale cooler and a deep sump aluminum finned PML oil pan.
I have never seen the transmission warning light on the dash come on. Good luck finding the exact temperature it is triggered at.
But I have experienced twice before adding the additional cooler and deep sump oil pan, the transmission got hot enough lock out some of the overdrive gears.
At the time I did not have a gauge installed; this is what prompted me to add a transmission temperature gauge & additional transmission fluid cooling.

I suspect the dual fan Derale cooler will provide much better cooling than the small OEM cooler since it is not that large.
In my case, the 10 plate Derale cooler in series with the factory cooler helped some, but not enough for my liking.
That is what prompted me to add the deep sump aluminum finned PML oil pan. It has fins on both the inside and outside to help dissipate heat.
The PML oil pan made a significant difference in temperate, I should have done it first!

After going through several manuals, this is all that I could find on the high temperature light on the dash.

Quote:

P0713-TRANSMISSION TEMPERATURE SENSOR HIGH
When Monitored: Continuously with the ignition on and engine running.
Set Condition: The DTC will set when the monitored Temperature Sensor voltage rises
above 4.94 volts for the period of 0.45 seconds.

taroo · **Joined:** Sun Apr 27, 2008 2:14 pm **Posts:** 259

As I was looking at the manifold you referenced earlier for the second temp sensor (Summit) I saw this from Glowshift as I was shopping for the second sensor.

1) is the transmission line a 5/16 or 3/8 inch?
2) do you see any reason that the Glowshift T-fitting will not work?

WWDiesel wrote:

The highest I have seen the temperature in summer while towing in the oil pan is 180-200. Line temperature gets much hotter.
But keep in mind, I have the factory cooler, a 10 plate stacked Derale cooler and a deep sump aluminum finned PML oil pan.
I have never seen the transmission warning light on the dash come on. Good luck finding the exact temperature it is triggered at.
But I have experienced twice before adding the additional cooler and deep sump oil pan, the transmission got hot enough lock out some of the overdrive gears.
At the time I did not have a gauge installed; this is what prompted me to add a transmission temperature gauge & additional transmission fluid cooling.

I suspect the dual fan Derale cooler will provide much better cooling than the small OEM cooler since it is not that large.
In my case, the 10 plate Derale cooler in series with the factory cooler helped some, but not enough for my liking.
That is what prompted me to add the deep sump aluminum finned PML oil pan. It has fins on both the inside and outside to help dissipate heat.
The PML oil pan made a significant difference in temperate, I should have done it first!

After going through several manuals, this is all that I could find on the high temperature light on the dash.

Quote:

P0713-TRANSMISSION TEMPERATURE SENSOR HIGH
When Monitored: Continuously with the ignition on and engine running.
Set Condition: The DTC will set when the monitored Temperature Sensor voltage rises
above 4.94 volts for the period of 0.45 seconds.

WWDiesel · **Posted:** Tue Apr 26, 2022 1:07 pm

I believe the lines to/from the cooler are 3/8".
The Glowshift Tee fitting should work just fine.
I used an aluminum "Tee" block gauge manifold and two Swageloc stainless fittings as pictured here.

You can find the gauge manifold Tee blocks online at Summit Racing and Amazon and a few other places.
https://www.amazon.com/Auto-Meter-2287- ... B00062YVP2

CATCRD · **Posted:** Fri Apr 29, 2022 9:33 am

taroo wrote:

As I was looking at the manifold you referenced earlier for the second temp sensor (Summit) I saw this from Glowshift as I was shopping for the second sensor.

1) is the transmission line a 5/16 or 3/8 inch?
2) do you see any reason that the Glowshift T-fitting will not work?

I have one just like this in the output line to the cooler, which is in series with an additional B&M cooler in the grille. But I didn't get it at glowshift.

I've seen 225F when climbing a slow, winding mountain grade in summer heat, jeep fully loaded but no trailer.

taroo · **Joined:** Sun Apr 27, 2008 2:14 pm **Posts:** 259

WWDiesel wrote:

The bolt in bung in the stock steel pan will work.
But, IF you can afford it and want to put the icing on the cake so to speak, go for the aftermarket PML transmission oil pan.
It adds several additional quarts of ATF capacity, has cooling fins inside & outside the pan, and comes pre-equipped with a large drain plug and a pre-taped hole for a temperature gauge sensor.

Adding the PML oil pan really made a huge difference in lowering fluid temperatures while towing a loaded trailer versus the additional stacked plate oil cooler that I added much earlier.
And if you want the every best oil pan gasket on the market, opt for the "LUBELOCKER" transmission oil pan gasket, they are fantastic. https://www.lubelocker.com/collections/ ... e-llt-crfe

So is yours the 2.5 or 4 quart oversized model?

I am still not pleased with my cooling capacity.

WWDiesel · **Posted:** Sat Nov 18, 2023 3:40 am

taroo wrote:

So is yours the 2.5 or 4 quart oversized model?
I am still not pleased with my cooling capacity.

Part Number 10304
Volume: 3 1/8 qts. over stock oil pan.

The PML oil pan really made a huge difference in transmission cooling, never see temperature above 210 now even when towing a heavy loaded trailer in high ambient & high humidity conditions.

taroo · **Joined:** Sun Apr 27, 2008 2:14 pm **Posts:** 259

WWDiesel wrote:

taroo wrote:

So is yours the 2.5 or 4 quart oversized model?
I am still not pleased with my cooling capacity.

Part Number 10304
Volume: 3 1/8 qts. over stock oil pan.

The PML oil pan really made a huge difference in transmission cooling, never see temperature above 210 now even when towing a heavy loaded trailer in high ambient & high humidity conditions.

And did you tap the sensor hole or did you pay the $75 to have PML do it?
“ Yes, add drilling and tapping of a 1/8 NPT hole + $75.00”

WWDiesel · **Posted:** Sat Nov 18, 2023 1:05 pm

taroo wrote:

And did you tap the sensor hole or did you pay the $75 to have PML do it?
“ Yes, add drilling and tapping of a 1/8 NPT hole + $75.00”

Actually, it came already drilled and taped for the temperature sensor and I did not pay anything extra. I was going to drill and tap it myself, but I did not have to.

I purchased it from Geno's Garage; they specialize in products for diesel trucks.
https://www.genosgarage.com/product/PML ... ssion-pans

Remote Tranny Cooler installed...Now-question.

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