Trans. Temperature?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,731
Likes: 2,658
From: SE Florida
have you ever run your engine a little on the warm side with an auto trans? if you have,you'll notice the trans temp also increase (even without extra load.let's say with a failing water pump/coolant fan for example.)
the coolant flowing though the radiator is very warm of course (around 200F for diesels,we'll say roughly.) this heat of the rad does indeed transfer over to the ATF fluid.im surprised to hear you say otherwise really.
the coolant flowing though the radiator is very warm of course (around 200F for diesels,we'll say roughly.) this heat of the rad does indeed transfer over to the ATF fluid.im surprised to hear you say otherwise really.
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
We sure are fortunate to have Mark around here.
Always good to hear it "from the horses mouth", so-to-speak.
So many myths get dispelled in the real-world testing environment; the world of thermocouples and data recorders, working inside environmental chambers the size of a small home.
It separates the "Here's how I think it probably is" from "Here's how it IS"!
As always, thanks to Mark for sharing his life-long testing experience with us. He's a source I really trust for info in this area of expertise.
It appears that he yet needs a few to have his "full pull" of reps. Let's all send him some to fill it out for him, guys!
Pop
Always good to hear it "from the horses mouth", so-to-speak.
So many myths get dispelled in the real-world testing environment; the world of thermocouples and data recorders, working inside environmental chambers the size of a small home.
It separates the "Here's how I think it probably is" from "Here's how it IS"!
As always, thanks to Mark for sharing his life-long testing experience with us. He's a source I really trust for info in this area of expertise.
It appears that he yet needs a few to have his "full pull" of reps. Let's all send him some to fill it out for him, guys!
Pop
Junior User
Joined: May 2005
Posts: 69
Likes: 0
From: milwaukee,WI
Well the whole 100 deg over out side temp I think is true, If it 95 out my trans get up to 195 and this is all pulling about 28000 GVW, now when I'm on some two lane roads I see temps around 200 to 210. I have a John wood's trans I don't run the bypass, I have tru cool cooler, mag-hytec trans pan and I run mobile one ATF. I don't pull over I just let the trans cool by not jumping all over the go peddle so much.
Fleet Owner
Joined: Jul 2006
Posts: 20,376
Likes: 843
From: Mi'kma'ki
thanks Mark.
wow that '99 yr was a real fluke.wonder what they where thinking.you sure wouldn't want to try working the truck any while not going down the road,just as towing or heck even driving slow through traffic in summer heat,nor try plowing etc.etc.etc.good to see that changed that real quick.
going to have to agree,as iv read the rad's sections warms the temps in the past,im just not seeing it myself either.i'v decided to install my t-sat pre-rad to help get the temps up.
ideal;
1.
a conception of something in its perfection.
2.
a standard of perfection or excellence.
agreed,we sure are fortunate to have Mark around here.
your welcome Pop for me taking my time to show you how you can get closer to ideal trans temps in the winter.
wow that '99 yr was a real fluke.wonder what they where thinking.you sure wouldn't want to try working the truck any while not going down the road,just as towing or heck even driving slow through traffic in summer heat,nor try plowing etc.etc.etc.good to see that changed that real quick.
going to have to agree,as iv read the rad's sections warms the temps in the past,im just not seeing it myself either.i'v decided to install my t-sat pre-rad to help get the temps up.
We sure are fortunate to have Mark around here.
Always good to hear it "from the horses mouth", so-to-speak.
So many myths get dispelled in the real-world testing environment; the world of thermocouples and data recorders, working inside environmental chambers the size of a small home.
It separates the "Here's how I think it probably is" from "Here's how it IS"!
As always, thanks to Mark for sharing his life-long testing experience with us. He's a source I really trust for info in this area of expertise.
It appears that he yet needs a few to have his "full pull" of reps. Let's all send him some to fill it out for him, guys!
Pop
Always good to hear it "from the horses mouth", so-to-speak.
So many myths get dispelled in the real-world testing environment; the world of thermocouples and data recorders, working inside environmental chambers the size of a small home.
It separates the "Here's how I think it probably is" from "Here's how it IS"!
As always, thanks to Mark for sharing his life-long testing experience with us. He's a source I really trust for info in this area of expertise.
It appears that he yet needs a few to have his "full pull" of reps. Let's all send him some to fill it out for him, guys!
Pop
ideal;
1.
a conception of something in its perfection.
2.
a standard of perfection or excellence.
agreed,we sure are fortunate to have Mark around here.
your welcome Pop for me taking my time to show you how you can get closer to ideal trans temps in the winter.
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
http://www.makcotransmissionparts.com/708-4739.html
http://www.transmissioncoolers.us/Me...ool-MAX-cooler
But thanks!
Pop
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
Could you elaborate a bit?
Pop
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,731
Likes: 2,658
From: SE Florida
Not from the factory you don't. There is a pressure relief there, not a thermostat. The bypass does NOTHING to help warm the transmission.
Mountain Pass
Joined: Mar 2010
Posts: 183
Likes: 27
From: Northern CA
I stand corrected.
I heard it works with the pressure of the cold oil opens it and hot thinner oil lets it close. When it was open the oil recycles and doesn't go through the coolers.
I will go with what Mark says.
I heard it works with the pressure of the cold oil opens it and hot thinner oil lets it close. When it was open the oil recycles and doesn't go through the coolers.
I will go with what Mark says.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,731
Likes: 2,658
From: SE Florida
That can happen, but only well below 0°F. And we found that if the bypass opened from cold, thick ATF, it didn't close again until the ambient got quite a bit warmer. Once the cooler plugged from thick ATF it doesn't matter how hot the trans gets it won't force the cold oil out of the cooler.
Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
Reps to you if I can! I hope you don't have to pay for the supporter badge! As much as you contribute, you should get it free for life. 