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Old Jan 20, 2007 | 03:37 AM
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From: Circle Pines
Transmission ?'s

My truck is a 99.5 f250 sd with 76k miles. I have done the itp regulated return, will be doing a itp pretank,fleetguard oil bypass and ford A.I.S. intake very soon(all in garage).

This is my first diesel (bought it 4months ago) for towing my 7500lb TT. I believe my auto transmission is running to warm. While towing in 50 degree weather in sept it was running close to 220 degrees. The previous owner put in amsoil tranny fluid and I am going to change it to Schaeffers tranny fluid as soon I figure out what to do to get my temps down. The truck is stock besides above upgrades. I will be doing a high flow muffler on the stock system(running 400 for egt while towing) and a dp-tuner this spring with the 60hp tow and 80 econo. I would really appreciate any help of any kind. Not sure if I should add a tranny cooler, replace the one I have, get an aluminum deep pan, or what.? Thanks for helping a newbie. Tom
 
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Old Jan 20, 2007 | 04:04 AM
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your bypass tuber on the trans might be bent or stuck...for a trans cooler some use a 6.0 trans cooler but i chose this http://www.dieselsite.com/index.asp?...ROD&ProdID=205
 
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Old Jan 20, 2007 | 07:49 AM
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I wouldn't start adding coolers until I found the problem, that is definatly too hot. When it's that hot do the lines going to the cooler on front feel hot? I'm going to agree on checking the bypass on the side of the transmission. One last question, what are the temps when running around town without pulling the trailer.
Joe
 
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Old Jan 20, 2007 | 07:54 AM
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If you are going to add a cooler. I recommend the 6.0 stock cooler. Larger and fits like it should without too much hassle.
 
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Old Jan 20, 2007 | 10:44 AM
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From: Circle Pines
Transmission ?'s

Joe and Ron,
Thanks for responding and hopefully you can share more on this bypass. Where is it, any links to pics sorry but I am not too familiar with tranny's. Joe my temps around town without the tow in 20 degree weather some stop and go some highway would be just over 140 after about 1 1/2 - 2 hrs. Thanks Tom
 
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Old Jan 20, 2007 | 12:24 PM
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From: White Mnt's,New Hampshire
Originally Posted by mndiesel
Joe and Ron,
Thanks for responding and hopefully you can share more on this bypass. Where is it, any links to pics sorry but I am not too familiar with tranny's. Joe my temps around town without the tow in 20 degree weather some stop and go some highway would be just over 140 after about 1 1/2 - 2 hrs. Thanks Tom
that is hot..i live in new hampshire and i never see my gauge move till i went to florida...i put the temp gauge in around november....80 to 85 dagree when i was in florida ..my temps never went over 150 for the trip down and back

as far as trans work go's..i just know what i read on here..this is my 1st auto i have ever had..so im learing alot as well...sorry!!! i wish i could help you more on that...
 
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Old Jan 20, 2007 | 01:59 PM
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Just throwin this against the wall, but, When truck is cold does your tranny guage read cold? I am wondering if tranny guage is not calibrated. Have you had any puking episodes(backing up trailer, and fluid is expelled from the overflo) I would think you would have an episode ike this if tranny was that hot.

have you smelled your tranny fluid, does it smell burnt(it should if it is getting that hot as a DD and a tow beast) looked at it, it should be a nice red color not brownish or black
 
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Old Jan 20, 2007 | 02:32 PM
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From: Central, Al
Pastor Mike had a similar episode with this kinds of temps and it was his Bypass.

Look on the passengerside of the tranny, there is a tube running from th eoutput to the return right up next to the tranny. It is supposed to close when cold to let the tranny warm faster. When they fail the stick open and always allow the fluid to bypass the cooler.

Dieselsite has them for about 45 bucks http://www.dieselsite.com/index.asp?PageAction=VIEWPROD&ProdID=172
 

Last edited by Uzumati; Jan 20, 2007 at 02:37 PM.
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Old Jan 20, 2007 | 03:32 PM
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From: Circle Pines
Originally Posted by bdrummonds
Just throwin this against the wall, but, When truck is cold does your tranny guage read cold? I am wondering if tranny guage is not calibrated. Have you had any puking episodes(backing up trailer, and fluid is expelled from the overflo) I would think you would have an episode ike this if tranny was that hot.

have you smelled your tranny fluid, does it smell burnt(it should if it is getting that hot as a DD and a tow beast) looked at it, it should be a nice red color not brownish or black
B- the guage is at its lowest point and takes a while before it actually starts reading a temp. Also I have had no episodes with the tranny puking nor have I ever smelled the fluid. No leaks at all. Thanks Tom
 
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Old Jan 20, 2007 | 03:37 PM
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From: Circle Pines
Originally Posted by amiller93
Pastor Mike had a similar episode with this kinds of temps and it was his Bypass.

Look on the passengerside of the tranny, there is a tube running from th eoutput to the return right up next to the tranny. It is supposed to close when cold to let the tranny warm faster. When they fail the stick open and always allow the fluid to bypass the cooler.

Dieselsite has them for about 45 bucks http://www.dieselsite.com/index.asp?PageAction=VIEWPROD&ProdID=172
Amiller,
Thanks for the info and the link. Its seems that I have all the symptoms and I'll climb under there tomorrow and test it. Thanks, I think this website rules and again its only as good as the people who are willing to share there experiences. It saves us rookies a LOT of TIME and MONEY. Thanks Tom
 
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