Steady Tranny Temp Increase during Trip - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 14 (permalink) Old 06-15-2009, 08:12 PM Thread Starter
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Steady Tranny Temp Increase during Trip

I just returned from the Hot Rod Power Tour where I pulled a flatbed trailer (2000lbs) for 1200 miles. During the trip, each leg of the tour was about 200 miles. Each day my transmission temperatures started low and slowly escalated all day. By the end of the day my temps were around 200 to 210. Hills caused the temps to rise quicker while flat running caused a slower increase. Temps never decreased while the truck was running, even idling. I have a stock cooler and I assumed it would be good for a empty 7K trailer. Is it plugged?

Thanks
Aaron

97 PSD 4X4 250K, Ron Holland/Banks 1.00 A/R, EBPV Delete, 3" DP, Kitty Delete, PHP Phoenix 6 POS, 140V IDM, Autometers on the Pillar,4" Intake, 17 degree SD pump, 18-20 psi depending on setting...
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post #2 of 14 (permalink) Old 06-15-2009, 08:39 PM
 
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Re: Steady Tranny Temp Increase during Trip

have you ever flushed it? and is it a stock trans?
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post #3 of 14 (permalink) Old 06-15-2009, 09:07 PM Thread Starter
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Re: Steady Tranny Temp Increase during Trip

Tranny is a stock reman (4K ago by PO). It still had the cosmoline on it when I bought the truck. The stock tranny cooler is a 11x4x1 (2 pass). I figure it should have held temps down on a empty flatbed trailer. From what I understand it should have held to 18GVW and I was around 8K. Engine temps were rock solid. The tranny only stopped climbing after the truck was stopped. The temps dropped when it was shut down.

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Aaron

97 PSD 4X4 250K, Ron Holland/Banks 1.00 A/R, EBPV Delete, 3" DP, Kitty Delete, PHP Phoenix 6 POS, 140V IDM, Autometers on the Pillar,4" Intake, 17 degree SD pump, 18-20 psi depending on setting...
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post #4 of 14 (permalink) Old 06-15-2009, 09:20 PM
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Re: Steady Tranny Temp Increase during Trip

check your cooler bypass valve

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post #5 of 14 (permalink) Old 06-15-2009, 09:31 PM Thread Starter
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Re: Steady Tranny Temp Increase during Trip

Quote:
Originally Posted by vapstroke View Post
check your cooler bypass valve
I didn't think I had one. Pre 99 had the E4OD and I was under the impression that the bypass came on the 4r100. I am going to look, however...

Any thoughts on this?

Aaron

97 PSD 4X4 250K, Ron Holland/Banks 1.00 A/R, EBPV Delete, 3" DP, Kitty Delete, PHP Phoenix 6 POS, 140V IDM, Autometers on the Pillar,4" Intake, 17 degree SD pump, 18-20 psi depending on setting...
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post #6 of 14 (permalink) Old 06-15-2009, 09:47 PM
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Re: Steady Tranny Temp Increase during Trip

Quote:
Originally Posted by Aaron Ford View Post
I didn't think I had one. Pre 99 had the E4OD and I was under the impression that the bypass came on the 4r100. I am going to look, however...

Any thoughts on this?

Aaron
best thing you can do is junk the stock cooler and put a 6.0 cooler on it problem solved.
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post #7 of 14 (permalink) Old 06-15-2009, 11:20 PM
 
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Re: Steady Tranny Temp Increase during Trip

that is true. the 6.0 cooler stops the 4r100 from having high temps. but out of the 3 OBS trucks that i have owned, none of my trans ever had high trans temps, except for my 97 4x4 with a flatbed and 4.10 gears, and that was after stomping on lil honda v-tecs, and some other ricers, then runnin a friends supercharged IDI 7.3 down hwy 45 to downtown houston, im not sure how fast we were going, i know that i had it at redline for about 6 miles tho
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post #8 of 14 (permalink) Old 06-15-2009, 11:32 PM
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Re: Steady Tranny Temp Increase during Trip

Quote:
Originally Posted by Aaron Ford View Post
The stock tranny cooler is a 11x4x1 (2 pass).
If you want the temps to be lower you need a larger cooler. A tru cool #4739 is smaller and easier to install than a 6.0 cooler but is a lot bigger than your stock one. I think your 97 has 3/8" lines but if it doesn't you will need to install some.

If only those who knew what they were talking about replied, this thread would still be on page one.
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post #9 of 14 (permalink) Old 06-16-2009, 05:47 AM
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Re: Steady Tranny Temp Increase during Trip

I have always notice that the tranny temp can do a slow slow increase like that. It does not just reach a set temp in say 30 mins of driving.

Tom
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post #10 of 14 (permalink) Old 06-16-2009, 10:46 PM
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Re: Steady Tranny Temp Increase during Trip

How high was ambient temp? was it increasing along with your tranny temp? those stock coolers just can't cut it.

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