Trans temps ? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 12 (permalink) Old 05-28-2010, 06:15 PM Thread Starter
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Trans temps ?

I was woundering a few questions.... one what is the normal operating temp of the trans on a 95 2wd. and what would be the max temp to reach.... The reason i ask is my 95 had some front end dammage and the tranny is not going through the radiator to cool it any more and i have put in an exturnal cooler but dont think it is large enough... so some general temp rules would be great if any body has any. Also the trans has 214,000 miles on it and i want to see how long i can get it to last.... Thanks

1999.5 F250 4x4 super cab 7.3L With edge attituede.
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post #2 of 12 (permalink) Old 05-28-2010, 09:50 PM
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I have always heard ambient temp + 100* and your gold. Saw a chart somewhere else that lists the temps and mileage limitations....ie....190* shortens the life to 100,000 miles.... 200* to 75,000......dont quote me on those numbers exactly.

But if your not hitting 210*-220* for any length of time I would think your ok. ( These are all fluid break down temps, not tranny parts.)

You never said what temps you are hitting now. That would help.

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post #3 of 12 (permalink) Old 06-01-2010, 01:27 PM Thread Starter
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the temps were running about 180ish around town. I put a larger cooler and they hang about 150. I drove this weekend about 100 miles on the highway and it never got over 160. i think i am ok... with the smaller cooler my temps got near 200 in town.

1999.5 F250 4x4 super cab 7.3L With edge attituede.
Converter lockup mod and EBPV exaust brake mod.
Air Hog cold air intake. Muffler delete, 35s on centerlines.
New F650 dash upgrade..

1995 F250 Single cab long bed 2wd.


2001 LB7 2500HD SOLD
AEM Brute Force intake, 5 1/2 stack exaust, Diablo Sport Predator Programmer. PPE boost valve, Autolite gauges. Built Allison (Alto steels, Red eagle clutches, Transgo shift kit, transgo lockup valve, and Personal Mods : ) edelbrock 1792 lift pump.


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post #4 of 12 (permalink) Old 06-01-2010, 01:38 PM
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@ 160 I would say your good. Long as the temp doesn't get to hot. (I'm also a firm believer in frequent fluid changes ) And you don't beat the snot out of your truck it should last you awhile.

2002 f250 4x4 SRW, 7.3L Auto, 4" exhaust, 20" rims on Toyo MT's, Boost, Pyro, Tranny ISSPRO ev's underdash pod., DP TUNER F5, stock, 60 tow, 80 , 120 race, DYI Tymar Intake

2000 New Holland 3930 Diesel tractor
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post #5 of 12 (permalink) Old 06-02-2010, 06:33 PM
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Most vehicles with trans oil thermostatic controls operate around 180*F, at least that's the goal. Hotter than 200*F for an length of time is bad but so is colder than 160*F.

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post #6 of 12 (permalink) Old 06-03-2010, 10:18 PM Thread Starter
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Quote:
Originally Posted by John_G View Post
Most vehicles with trans oil thermostatic controls operate around 180*F, at least that's the goal. Hotter than 200*F for an length of time is bad but so is colder than 160*F.
Interesting ... Ok

1999.5 F250 4x4 super cab 7.3L With edge attituede.
Converter lockup mod and EBPV exaust brake mod.
Air Hog cold air intake. Muffler delete, 35s on centerlines.
New F650 dash upgrade..

1995 F250 Single cab long bed 2wd.


2001 LB7 2500HD SOLD
AEM Brute Force intake, 5 1/2 stack exaust, Diablo Sport Predator Programmer. PPE boost valve, Autolite gauges. Built Allison (Alto steels, Red eagle clutches, Transgo shift kit, transgo lockup valve, and Personal Mods : ) edelbrock 1792 lift pump.


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post #7 of 12 (permalink) Old 06-06-2010, 03:48 PM
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Quote:
Originally Posted by John_G View Post
Most vehicles with trans oil thermostatic controls operate around 180*F, at least that's the goal. Hotter than 200*F for an length of time is bad but so is colder than 160*F.
The E4OD in a '95 does not have any type of thermostatic control on the transmission temperature.

Anything below 220F is fine. You can go as high as 250F, but not for more than 1/2 hour.

The trans was designed to operate around 170F to 180F.

Mark
Former Ford Automatic Transmission Engineer 1988-2007
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post #8 of 12 (permalink) Old 06-13-2010, 02:35 AM
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Quote:
Originally Posted by Stacked6600 View Post
the temps were running about 180ish around town. I put a larger cooler and they hang about 150. I drove this weekend about 100 miles on the highway and it never got over 160. i think i am ok... with the smaller cooler my temps got near 200 in town.
180* sounds about normal for around town city driving. It will always be lower on the highway not only because you have a lot more air flowing threw the grill, but also your TC is locked up.

190* is a little warm but not hot to where you have to worry, but wouldn't constantly run the truck if its always at 190*. From what I have found out, between 155* and 175* is a prime normal operating temp for trany's. Heat kills trany's.
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post #9 of 12 (permalink) Old 06-13-2010, 07:10 AM
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Putting the trans cooler in engine coolant raises the temp to near thermostat temperature when the weather is warm.

When the converter is in torque multiply mode the heat is shed to the coolant.

225 is the most that I want to see and 160 the least - for extended operation.

If it goes above 250 the next oil change will include a couple of gallons of trans fluid and at 275 it won't wait for an oil change.

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post #10 of 12 (permalink) Old 07-07-2010, 04:54 AM
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My 2000 seems to warm up to around 150 after warming up.
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