240* Trans temp towing with 275v4 - Ford Powerstroke Diesel Forum

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post #1 of 23 Old 08-11-2009, 06:36 AM Thread Starter
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240* Trans temp towing with 275v4

My trans temp hit 240 while towing 10k 5th wheel on an 8% grade with the 275v4, all other temps were within range highest EGT was 1200. Any ideas why tranny temp was so high?

08 F250 CC, 4x4, Blue/Pueblo Gold, 3.73, S & B CAI, 5" Magnaflo downpipe back, Spartan TCM 275 & 310 KEM 345 (SCT - Sold) Mickey Thompson 35 12.5 20's

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post #2 of 23 Old 08-11-2009, 06:42 AM
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The 275 tune wasnt meant for towing that kinda weight. Thats why. BTW you just cooked your fluid. Flush and refill it

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post #3 of 23 Old 08-11-2009, 06:42 AM
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hot tune, heavy trailer, africa hot outside..

my trans without towing about a week and a half ago was 210..but my trans is totally toast

-Evan

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post #4 of 23 Old 08-11-2009, 07:02 AM Thread Starter
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Originally Posted by Dave View Post
The 275 tune wasnt meant for towing that kinda weight. Thats why. BTW you just cooked your fluid. Flush and refill it
I know alot of people on here tow that weight with the 275 tune, i'm wondering what kinda temps they see?

At what temp does the fluid cook?

08 F250 CC, 4x4, Blue/Pueblo Gold, 3.73, S & B CAI, 5" Magnaflo downpipe back, Spartan TCM 275 & 310 KEM 345 (SCT - Sold) Mickey Thompson 35 12.5 20's

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post #5 of 23 Old 08-11-2009, 07:18 AM
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About 225-230 Most of those people that tow with 275 arent towing 10k

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
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post #6 of 23 Old 08-11-2009, 07:31 AM
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Quote:
Originally Posted by Dave View Post
About 225-230 Most of those people that tow with 275 arent towing 10k
Especially not up a 8% grade. 240* is ridiculous....

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post #7 of 23 Old 08-11-2009, 07:34 AM
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Wow.....
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post #8 of 23 Old 08-11-2009, 08:52 AM Thread Starter
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Originally Posted by Dave View Post
About 225-230 Most of those people that tow with 275 arent towing 10k
Mine has ran 230 pulling the same load on the same trip using the 210 tune

08 F250 CC, 4x4, Blue/Pueblo Gold, 3.73, S & B CAI, 5" Magnaflo downpipe back, Spartan TCM 275 & 310 KEM 345 (SCT - Sold) Mickey Thompson 35 12.5 20's

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post #9 of 23 Old 08-11-2009, 09:16 AM
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What kind of vehicle speed were you at?

Towing grades like that with the 275, I would strongly recommend keeping vehicle speed at 65 or above even if it comes at the cost of higher EGT's. Any time the converter unlocks (when you slow down) on a grade that long and steep, tranny temps will climb quickly. 70-80MPH (I know, a little fast for the trailer) will actually maintain better temperatures than slower speeds.

As for the fluid, flush it. 240 isn't a meltdown temperature, but it's getting up there and as the others mentioned, likely degraded the fluid.

Your best investment if this is your normal driving style would be a Suncoast converter, even if you don't mess with the full trans yet. Would be cheap insurance to keep you off the side of the road

Matt Geouge
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post #10 of 23 Old 08-11-2009, 09:44 AM Thread Starter
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Quote:
Originally Posted by SpartanDieselTech View Post
What kind of vehicle speed were you at?

Towing grades like that with the 275, I would strongly recommend keeping vehicle speed at 65 or above even if it comes at the cost of higher EGT's. Any time the converter unlocks (when you slow down) on a grade that long and steep, tranny temps will climb quickly. 70-80MPH (I know, a little fast for the trailer) will actually maintain better temperatures than slower speeds.

As for the fluid, flush it. 240 isn't a meltdown temperature, but it's getting up there and as the others mentioned, likely degraded the fluid.

Your best investment if this is your normal driving style would be a Suncoast converter, even if you don't mess with the full trans yet. Would be cheap insurance to keep you off the side of the road
Matt, thanks for the response.
I'm pulling between 65-68 MPH. Does the speed need to be that fast pulling with the 210 also? I thought 240 was high but it was still in the range of 220-275 max that Mick has listed on the reccomended settings for the DashDaq, so I guess the max of 275 would be toast?

08 F250 CC, 4x4, Blue/Pueblo Gold, 3.73, S & B CAI, 5" Magnaflo downpipe back, Spartan TCM 275 & 310 KEM 345 (SCT - Sold) Mickey Thompson 35 12.5 20's

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