Transmission Temperature too high? - TheDieselGarage.com
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post #1 of 27 (permalink) Old 02-11-2009, 10:50 PM Thread Starter
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Transmission Temperature too high?

Hey guys, Ive got a good question...

1995 Powerstroke, E4OD.

Before the Torque Converter Died on me over a month ago, my Tranny temp wouldn't climb higher than 150-160* F during normal driving, highway, and some in town.

The Day it died, it was around 180-190* F on a 32* F day

I got it rebuilt, Racer X rebuild kit with extra clutches, intermediate band, and a triple disk Torque Converter, along with a Trans Go Tugger kit, with pump mod.

Now, today, its 55-60* F outside, and I was driving it on some back roads, not real bad as far as hills and windy, and my Tranny Temp was around 190* F

Is that normal, or ok? I have probably only about 100-200 miles on the rebuild as of now, and REALLY dont wanna sink more cash into it if it breaks again.

I flushed the Cooler and lines as well before the trans was installed again.

All of the above driving, was Empty driving. Unladen weight of my truck is about 7000 lbs.

Any help is appreciated, I planned on putting a new cooler in sometime for more capacity.

Thanks,
Garrett

1995 F-250HD XLT. 7.3L, E4OD. TW 6 Position chip, K&N Intake--Tymar 3x4" DP--5" straight piped--36"x5" Miter Stacks--Rebuilt Trans--Trans-Go Tugger--Turbo Timer--Autometer Pyro, Trans, Boost guages in A-pillar--Cervini's Cowl Hood--Buckstop Bumper, and LOTS MORE!

Dana 60 Swap STILL in progress...

2003 Ford Mustang Cobra, Gotta love being blown!
1993 Ford Lightning, My 393ci Sleeper
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post #2 of 27 (permalink) Old 02-11-2009, 11:44 PM
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Quote:
Originally Posted by weareweird69 View Post
Hey guys, Ive got a good question...

1995 Powerstroke, E4OD.

Before the Torque Converter Died on me over a month ago, my Tranny temp wouldn't climb higher than 150-160* F during normal driving, highway, and some in town.

The Day it died, it was around 180-190* F on a 32* F day

I got it rebuilt, Racer X rebuild kit with extra clutches, intermediate band, and a triple disk Torque Converter, along with a Trans Go Tugger kit, with pump mod.

Now, today, its 55-60* F outside, and I was driving it on some back roads, not real bad as far as hills and windy, and my Tranny Temp was around 190* F

Is that normal, or ok? I have probably only about 100-200 miles on the rebuild as of now, and REALLY dont wanna sink more cash into it if it breaks again.

I flushed the Cooler and lines as well before the trans was installed again.

All of the above driving, was Empty driving. Unladen weight of my truck is about 7000 lbs.

Any help is appreciated, I planned on putting a new cooler in sometime for more capacity.

Thanks,
Garrett
I dont know if the tranny has a break in, but I dont think so, I would upgrade the STOCK tranny cooler ASAP.
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post #3 of 27 (permalink) Old 02-12-2009, 01:21 AM
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I would replace both the aux cooler and the radiator cooler. It's impossible to completely clean them. It sounds like you have some blockage in one or both coolers.

Mark
Former Ford Automatic Transmission Engineer 1988-2007
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post #4 of 27 (permalink) Old 02-12-2009, 02:13 AM Thread Starter
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You have to replace the whole Radiator to do that dont you?

And, I had flushed the lines fairly well, I really didnt want to get into the cooler stuff, at least NOW... but I may have to.

Anything else that would cause this?

Also, the trans fluid was clean when it came out, no chunks, or shavings, even out of the TC.


I am starting to think its the gauge however, because it gets hot fast, 4 miles = 150* possible that the sender got screwed up during the transmission change, or there may be a pocket of air in there?

I am trying to exhaust all my free options before I do cooler mods.

but, If I end up doing cooler mods, obviously an upgrade is the thing to do, but which way to go?




EDIT:

How can I check to see if any of the coolers are restricted?

1995 F-250HD XLT. 7.3L, E4OD. TW 6 Position chip, K&N Intake--Tymar 3x4" DP--5" straight piped--36"x5" Miter Stacks--Rebuilt Trans--Trans-Go Tugger--Turbo Timer--Autometer Pyro, Trans, Boost guages in A-pillar--Cervini's Cowl Hood--Buckstop Bumper, and LOTS MORE!

Dana 60 Swap STILL in progress...

2003 Ford Mustang Cobra, Gotta love being blown!
1993 Ford Lightning, My 393ci Sleeper

Last edited by weareweird69; 02-12-2009 at 04:36 AM.
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post #5 of 27 (permalink) Old 02-12-2009, 05:31 AM
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your trans temp is not bad, i would not want to see much more than thatmaybe 230-250ish max. but when the cooler goes through the radiator it will either cool or heat the trans fluid to engine temp. so if the tranny fluid is cold the radiator will heat it to engine temp. what you can do is route the fluid through the radiator cooler 1st. then through external cooler last. that should keep fluid temp fairly low. anyway where did you mount the temp sensor.
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post #6 of 27 (permalink) Old 02-12-2009, 06:01 AM
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TRANNY TEMPS:


Alot of people freak out for no reason,...







Most automatic transmissions fail due to a breakdown of the transmission fluid caused by overheating. This chart provides a graphic display of heats contribution to transmission failure. The effect is also cumulative. Short term exposure to high heat levels (or even prolonged exposure to moderate heat) can break down the fluid to the point where even very short episodes of overheating will lead to failure.

____________________________

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post #7 of 27 (permalink) Old 02-12-2009, 12:01 PM
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Since the radiator cooler requires replacement of the entire radiator and those are far from cheap I opted to place a filter with a pressure bypass (if it gets completely clogged) after the radiator cooler but before the oversized auxiliary cooler.

I can say that for the first thousand miles my temps were a bit warmer than they had been before and then they settled down to be far cooler that pre-rebuild.

It is possible that you have a failed trans temp sender but an air pocket is very unlikely.

95 F350 Centurion Conversion Bronco (Crew Cab SRW) 4X4 4.10, Isspro Performax Boost, Pyro, & trans temp on the A-pillar, BDP Stage 1 injectors, Open air intake, Dpp Downpipe, Self built E4OD with parts from Racer-X, Tony Wildman Chip, Early '99 Intercooler.

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post #8 of 27 (permalink) Old 02-12-2009, 08:56 PM Thread Starter
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Tank, I saw your post before on trans temps. Just my trans never climbed much over 150*, and 160-170* towing Pre-rebuild. I was just very worried the other day that it climbed over 200*

4-play, the sender is in the pressure port, on the drivers side of the trans, above the pan.

I also think the sender is bonkers. In 2 miles, it climbs to over 110*, and after idling for 15 minutes, the needle on the gauge is off its stop post.

I may just leave it be like BJS said, and see if it settles down after bit.


Thanks guys, and any more input will be helpful.

1995 F-250HD XLT. 7.3L, E4OD. TW 6 Position chip, K&N Intake--Tymar 3x4" DP--5" straight piped--36"x5" Miter Stacks--Rebuilt Trans--Trans-Go Tugger--Turbo Timer--Autometer Pyro, Trans, Boost guages in A-pillar--Cervini's Cowl Hood--Buckstop Bumper, and LOTS MORE!

Dana 60 Swap STILL in progress...

2003 Ford Mustang Cobra, Gotta love being blown!
1993 Ford Lightning, My 393ci Sleeper
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post #9 of 27 (permalink) Old 02-12-2009, 09:19 PM
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dont listen to 4-play.

your tranny should be running 100 degrees over ambient.

so if its 50* out , 150* is normal.

temperatures over 200 arent normal for every day driving.

if you run that tranny 230*-250* like 4-play said.... you are going to be replacing that tranny again real soon.

make sure the bypass is functioning properly, and make sure the cooler isnt backed up.

before u do that,, change ur tranny sender and gauge.

2000 F-350 Super cab, Tadds tunes, AFE Pro Guard intake, 4" MBRP cool Duals, Nexus Gauges , Tubonetics Ball Bearing Turbo.
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post #10 of 27 (permalink) Old 02-13-2009, 03:24 AM Thread Starter
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I spoke with Racer X today, and was told that the transmission will run warmer with tighter clearances, and being that i have extra clutches, they are still wearing in, and generating heat. It only has 200 miles on the transmission. and nothing more than a 15 mile trip at a time.

1995 F-250HD XLT. 7.3L, E4OD. TW 6 Position chip, K&N Intake--Tymar 3x4" DP--5" straight piped--36"x5" Miter Stacks--Rebuilt Trans--Trans-Go Tugger--Turbo Timer--Autometer Pyro, Trans, Boost guages in A-pillar--Cervini's Cowl Hood--Buckstop Bumper, and LOTS MORE!

Dana 60 Swap STILL in progress...

2003 Ford Mustang Cobra, Gotta love being blown!
1993 Ford Lightning, My 393ci Sleeper
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