Transmission Temps??
It's a Van Gogh
Joined: Feb 2010
Posts: 7,802
Likes: 1,333
From: Elk Grove, CA
Just to confirm, one of your 3 gauges is an aftermarket for the trans and one of your tunes is for towing, right? What will you tow?
General FYI: Keeping RPMs up helps keep EGTs down since more air is blowing thru the engine. As for trans the stock 7.3 trans cooler is ok if you are rolling along at 65, but slog up a steep hill at 30 and the reduced air flow plus the increased work load can lead to overheating the trans.
General FYI: Keeping RPMs up helps keep EGTs down since more air is blowing thru the engine. As for trans the stock 7.3 trans cooler is ok if you are rolling along at 65, but slog up a steep hill at 30 and the reduced air flow plus the increased work load can lead to overheating the trans.
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Senior User
Joined: Dec 2009
Posts: 162
Likes: 0
From: Sumter, SC
Just to confirm, one of your 3 gauges is an aftermarket for the trans and one of your tunes is for towing, right? What will you tow?
General FYI: Keeping RPMs up helps keep EGTs down since more air is blowing thru the engine. As for trans the stock 7.3 trans cooler is ok if you are rolling along at 65, but slog up a steep hill at 30 and the reduced air flow plus the increased work load can lead to overheating the trans.
General FYI: Keeping RPMs up helps keep EGTs down since more air is blowing thru the engine. As for trans the stock 7.3 trans cooler is ok if you are rolling along at 65, but slog up a steep hill at 30 and the reduced air flow plus the increased work load can lead to overheating the trans.
Thanks guys for your feed back
Fleet Mechanic
Joined: Apr 2011
Posts: 1,441
Likes: 6
From: Marseilles IL
Is too cool bad also? Now that it's winter my Trans only gets to 110,120 at best.
Posting Guru
Joined: Jan 2008
Posts: 2,408
Likes: 0
From: Trenton, MI
Subrscrible to this one.
My transmission temp is 120oF in 30oF outside. I tried block trans cooler it seem it does help little on cold day.
Didn't ford supposed to had bypass line on transmission with theromstat on it? Tran shop replaced that since old one had cut on line.
My transmission temp is 120oF in 30oF outside. I tried block trans cooler it seem it does help little on cold day.
Didn't ford supposed to had bypass line on transmission with theromstat on it? Tran shop replaced that since old one had cut on line.
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From: Sumter, SC
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Fleet Mechanic
Joined: Apr 2011
Posts: 1,441
Likes: 6
From: Marseilles IL
The factory cooler from a 6.0 diesel superduty is good from what I read here. I believe there is 2 sizes, not sure mabe 26 and 31 row? Both are verry big.
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Senior User
Joined: Dec 2009
Posts: 162
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From: Sumter, SC
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,704
Likes: 2,626
From: SE Florida
There is a bypass on the transmission. It does not have a thermostat. It has a pressure relief valve. If the cooler circuit gets restricted it opens to continue to provide lube to the rear of the trans. It does not help warm up the transmission.
Logistics Pro
Joined: Jun 2005
Posts: 4,243
Likes: 16
From: AZ
Does anyone remember a write-up where someone put a hydraulic fluid thermostat device in the transmission fluid line? The device would block or reduce the flow of fluid to get the tranny fluid to operating temperature and then work (by opening or closing as needed) to hold it at that temperature. I've hunted all over and can't find the thread...can't say for sure I read it here though. Any thoughts on this Mark? Would 180 degrees be the "ideal" temperature target?
Posting Guru
Joined: Jan 2008
Posts: 2,408
Likes: 0
From: Trenton, MI
Does anyone remember a write-up where someone put a hydraulic fluid thermostat device in the transmission fluid line? The device would block or reduce the flow of fluid to get the tranny fluid to operating temperature and then work (by opening or closing as needed) to hold it at that temperature. I've hunted all over and can't find the thread...can't say for sure I read it here though. Any thoughts on this Mark? Would 180 degrees be the "ideal" temperature target?
I remember see 1 thread about TRU cooler with thermostat built inside but I would like find one that you speak about hydraulic fluid thermostat device.
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 24
From: Damon (South East Texas)
Does anyone remember a write-up where someone put a hydraulic fluid thermostat device in the transmission fluid line? The device would block or reduce the flow of fluid to get the tranny fluid to operating temperature and then work (by opening or closing as needed) to hold it at that temperature. I've hunted all over and can't find the thread...can't say for sure I read it here though. Any thoughts on this Mark? Would 180 degrees be the "ideal" temperature target?