Transmission temp ???
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,703
Likes: 2,624
From: SE Florida
That temp chart above is as useful as the dealer mentioned above! Both are worse than useless.
That chart MIGHT have been right with 1960's type ATFs and seals. It isn't even close to being right with modern transmissions and ATFs.
You can go up to 250F for a half hour at a time with NO damage. Above 250 you are getting to a place where you don't want your trans to go. For steardy state operation you shouldn't go over 220F.
These temps are in the pan or test port. The temps in the line to the cooler is going to be hotter.
That chart MIGHT have been right with 1960's type ATFs and seals. It isn't even close to being right with modern transmissions and ATFs.
You can go up to 250F for a half hour at a time with NO damage. Above 250 you are getting to a place where you don't want your trans to go. For steardy state operation you shouldn't go over 220F.
These temps are in the pan or test port. The temps in the line to the cooler is going to be hotter.
Post Fiend
Joined: Apr 2004
Posts: 5,158
Likes: 35
From: North of Salt Lake City
Originally Posted by Mark Kovalsky
That temp chart above is as useful as the dealer mentioned above! Both are worse than useless.
Maybe some homework would be in order before you make such statements.
Last edited by EpicCowlick; Aug 22, 2007 at 09:22 AM.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,703
Likes: 2,624
From: SE Florida
Maybe it would be.
My 18+ years as a transmission engineer at Ford, the last three in transmission cooling, is what I'm using for homework. When I worked there (I left earlier this year) I had plenty of data that showed that chart is only useful to scare people into more expensive fluid and bigger coolers. Sometimes they are needed, but that chart is NOT accurate.
My 18+ years as a transmission engineer at Ford, the last three in transmission cooling, is what I'm using for homework. When I worked there (I left earlier this year) I had plenty of data that showed that chart is only useful to scare people into more expensive fluid and bigger coolers. Sometimes they are needed, but that chart is NOT accurate.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,703
Likes: 2,624
From: SE Florida
Originally Posted by Mark Kovalsky
When I worked there (I left earlier this year) I had plenty of data
Senior User
Joined: Mar 2007
Posts: 348
Likes: 0
Originally Posted by Mark Kovalsky
Note the past tense that I highlighted. I had plenty of data at Ford. It belongs to Ford, and I left it there. It isn't mine to share. You can either believe what my experience is telling you, or you can believe something else. Your call.
Senior User
Joined: Apr 2003
Posts: 241
Likes: 0
Originally Posted by Mark Kovalsky
That temp chart above is as useful as the dealer mentioned above! Both are worse than useless.
That chart MIGHT have been right with 1960's type ATFs and seals. It isn't even close to being right with modern transmissions and ATFs.
You can go up to 250F for a half hour at a time with NO damage. Above 250 you are getting to a place where you don't want your trans to go. For steardy state operation you shouldn't go over 220F.
These temps are in the pan or test port. The temps in the line to the cooler is going to be hotter.
That chart MIGHT have been right with 1960's type ATFs and seals. It isn't even close to being right with modern transmissions and ATFs.
You can go up to 250F for a half hour at a time with NO damage. Above 250 you are getting to a place where you don't want your trans to go. For steardy state operation you shouldn't go over 220F.
These temps are in the pan or test port. The temps in the line to the cooler is going to be hotter.
RoyC
Postmaster
Joined: Jul 2006
Posts: 2,632
Likes: 4
Originally Posted by emptyd
Moderators, can you shed some light on the credability of the claims here. I know you are not referees, but you also have a broad view of a poster's history that some of us "short timers" may not.
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Senior User
Joined: Mar 2007
Posts: 348
Likes: 0
Originally Posted by VaSheriff
WTF? I don't have a problem with Mark's credibility. Why would anybody?
Moderators practically live on the forum, so it seemed they would have the best feeling for the value of a poster's opinion.
No offense intended to anyone, just trying to help one poster gain an understanding of the value of an opinion offered by another poster.
Senior User
Joined: Mar 2007
Posts: 348
Likes: 0
Originally Posted by Mr. Obvious
My 18+ years as a transmission engineer at Ford, the last three in transmission cooling, is what I'm using for homework.
Only a pinhead would have a problem with this and ask for more data.
Only a pinhead would have a problem with this and ask for more data.
Task accomplished. Rep points diminished. Oh well.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,703
Likes: 2,624
From: SE Florida
Originally Posted by emptyd
Moderators, can you shed some light on the credability of the claims here.
I used to post over 5 years ago, then disappeared. For reasons I won't go into now I posted under the name Casey_1 for the last 5 years. I changed back to my name last week.
Senior User
Joined: Mar 2007
Posts: 348
Likes: 0
Originally Posted by Mark Kovalsky
You didn't offend me. I don't know how to prove it, and I don't know the moderators all that well. That should help my credibility!
I used to post over 5 years ago, then disappeared. For reasons I won't go into now I posted under the name Casey_1 for the last 5 years. I changed back to my name last week.
I used to post over 5 years ago, then disappeared. For reasons I won't go into now I posted under the name Casey_1 for the last 5 years. I changed back to my name last week.
In large part the quality of that info is controlled by the moderators who can help to sniff out fakes. I know you're not one, but the guy asking for the "homework" may not have.
Thanks for putting up with those of us who don't know and have to ask people like you who do know. Thanks for tolerating those of us that might even doubt your skill (though I am not among them). Your patience with those who have been "bamboozeled" by frauds in the past is a credit to your wisdom.
Posting Guru
Joined: Aug 2006
Posts: 1,199
Likes: 0
From: High Point, NC
I did a google search for Mark Kovalsky and found all sorts of stuff - it looks like he's been on many forums including The Diesel Stop, RV Escapees, F150 Online, OpenRoadForum (rv.net), and of course, here. Without looking at the profile for each of those forums, it looks like his been around for quite a few years - he's even authored a few tech articles.
So I think credability can be easily established.
Now to recoupe mine - Mark K, I posted above that graph that i use it as a "gauge"... i didn't say it was the gospel.
With your background, can you provide some 'enlightenment' and dispel some of the 'urban legends' about tranny temps and how to gauge/control them?
Thanks.
So I think credability can be easily established.
Now to recoupe mine - Mark K, I posted above that graph that i use it as a "gauge"... i didn't say it was the gospel.
With your background, can you provide some 'enlightenment' and dispel some of the 'urban legends' about tranny temps and how to gauge/control them?
Thanks.