Transmission Temp.
Mountain Pass
Joined: Mar 2006
Posts: 207
Likes: 78
In Texas summer pulling with the (now ex) 2020 7.3L DRW 350 + 10 speed I would see 200~210 max. It was typically 180+ when everything was at operating temp. Trailer weight 13,900. And it's not flat here, so usually in 1st or maybe 2nd OD. .
Fleet Mechanic
Joined: May 2018
Posts: 1,765
Likes: 502
There's really no minimum, the tranny will generate heat and keep the fluid nice and toasty. When I had a 5.0 with the 6 speed, I would regularly see transmission temps between 205 and 225 towing, it rarely went under 200 with a trailer hooked up. I think I read on here once you start pushing 230 you need to pay attention and maybe take your foot out of it a bit and the 'limit' for the fluid was somewhere in the 240's. That's assuming the 10 speed is still using the same general setup as the 6 speed
Lead Driver
Joined: Jun 2005
Posts: 8,475
Likes: 727
From: Calgary Canada
That Mark guy chimes in on these threads pretty often, but nearly every concern about fluid temps are based on very old information that does not apply to these transmissions. That's what I've taken from his comments.
Cargo Master
Joined: Mar 2004
Posts: 2,220
Likes: 1,423
From: CA
Always seems to be in the 200's while towing. Last trip, I toggled through for a peek and it was 212.
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,732
Likes: 2,661
From: SE Florida
Yes, he does.
These transmissions have thermostats that keep the transmissions hotter than 200°F. When towing expect the temps to get a bit higher than when running empty.
These transmissions have thermostats that keep the transmissions hotter than 200°F. When towing expect the temps to get a bit higher than when running empty.
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5th Wheeling
Joined: May 2010
Posts: 48
Likes: 17
From: West Tennesse
Yes on the thermostat for the transmission. Currently in Texas camping and pulling my 6500 lb jayco with my 22 F350 7.3 430 combo. Was able to watch the transmission temp and it's cycled between 217 and 207 with the thermostat.
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