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Transmission temps while towing?

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Old Jun 28, 2010 | 06:44 PM
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Transmission temps while towing?

Hey folks,

Have an '01 F350 V10 3.73 and just installed a Scanguage so I can monitor my tranny temp (among other temps) while towing.

Just wondering what sort of range of temps I should expect to see? Noodling around town (not towing) it was at about 135-140.
Also, anyone know at what temp the dash idiot light comes on and starts sending shivers down your spine....this is the reason for the guage as I don't ever want to get close to that temp.

Cheers,
Mike
 
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Old Jun 28, 2010 | 06:48 PM
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It can safely go to 220°F all day long. You can go to 250°F for no more than 1/2 hour. I don't know of a dash light, but the OD light will flash at 275°F.
 
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Old Jun 28, 2010 | 06:54 PM
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dead on those temps are good.
 
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Old Jun 28, 2010 | 07:22 PM
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Thanks guys,

With the 3.73 diff I will not be towing in OD (just on the edge of wanting to drop out of OD at the MAX 60MPH I drive at while towing), so will the OD light still flash at me if I neglect to watch my guage and it gets to the 275?

Sorry for the dumb ??

Cheers,

Mike
 
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Old Jun 28, 2010 | 07:34 PM
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What are you towing weight wise, in what terrain? I would consider regearing the truck. The 3.73s are horrible gears in the 5.4l and 6.8l SDs, I know I have 3.73s in mine. Your empty trans temp numbers in the summertime are normal, I get similar. I have never seen over 190 degrees trans temps but I don't tow close the GCWR of the truck.
 
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Old Jun 28, 2010 | 07:39 PM
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Mine was at 145 towing in 100 degree heat in VA. I was in 4th gear with a torque shift.
 
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Old Jun 28, 2010 | 07:47 PM
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The 4R100 and the 5R110 are completely different animals.
 
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Old Jun 28, 2010 | 07:49 PM
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I'm towing about 8000lbs, and I am thinking about going to 4.30's - this trip with some mountain passes will be the determining factor.
The truck is a 2WD, so it could be a relatively painless process.
 
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Old Jun 28, 2010 | 07:56 PM
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what transmission do you have?
 
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Old Jun 28, 2010 | 08:24 PM
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Originally Posted by sandmanf250
what transmission do you have?
4R100. Ain't a torqushift, that's for dam sure. ZF6 was the only other option, but I don't think he'd be talking about the trans wanting to drop a gear if he was the one punching the clutch.
 
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Old Jun 28, 2010 | 08:24 PM
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Originally Posted by Mike E.
I'm towing about 8000lbs, and I am thinking about going to 4.30's - this trip with some mountain passes will be the determining factor.
The truck is a 2WD, so it could be a relatively painless process.
If you have around stock size tire 4.30s or even 4.56s will work well for you. I would also consider looking into an SCT tuner with some tunes from 5 Star. The 5 Star tow tunes make a healthy difference in performance, plus they will improve the shift and TQ lockup strategies greatly helping to reduce trans temps.

I don't think you'll have any issues with 8k lbs though.
 
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Old Jun 28, 2010 | 10:14 PM
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Originally Posted by Mike E.
will the OD light still flash at me if I neglect to watch my guage and it gets to the 275?
Yes it will.
 
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