Transmission Temp

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May 18, 2024 | 08:41 AM

TexasJackKin

Thread Starter

Mountain Pass

Joined: Jan 2024

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Transmission Temp

This past week I was towing a light travel trailer (Less than 5,000 lbs) from Nevada to Truckee CA. There were a few good grades where the transmission temp hit 224 degrees, and the engine coolant temp hit 218 degrees. 2024 F-250 7.3L gas, outside air temp in the mid to high 70s, elevation ~6,000 feet. Are these normal temps under the circumstances?

May 18, 2024 | 08:51 AM

Kameron Rice

Fleet Mechanic

Joined: Nov 2019

Posts: 1,429

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From: North Carolina

Yes. At 225 the cooling fan comes on. You didn’t even make it to that point

May 18, 2024 | 08:51 AM

senix

Super Moderator

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From: Frederick, MD

yes, perfectly fine.

May 19, 2024 | 09:20 AM

2019er

Laughing Gas

Joined: Oct 2018

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From: NC

Did that gas engine scream and whine and almost red line? Is the reason I bought a diesel. I've hit 230 F going up some steep hills hauling my 5,000 ish pound truck camper up them.

May 19, 2024 | 11:21 AM

Poncho450

Lead Driver

Joined: Oct 2014

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From: NY/Canada border

Quote:

Originally Posted by 2019er

Did that gas engine scream and whine and almost red line? Is the reason I bought a diesel. I've hit 230 F going up some steep hills hauling my 5,000 ish pound truck camper up them.

7.3 10 speeds don't do this anywhere close to what the 6.2 6 speeds did.

May 19, 2024 | 11:53 AM

DaveZX

Tuned

Joined: Dec 2019

Posts: 250

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From: Fredericksburg VA

I have a F250, 6.2, 6 speed, 4:30. I towed a 12 000# 5er over Donner Pass, 7,000+ elevation. I ran it over the pass around 3,500 - 3700 RPM in 3rd gear 50 -55 MPH. My trans was in the low 200s. I'm not in a hurry so I don't race up hills.

On very steep inclines with switchbacks, the speed limit is often 25. One 6 mile section was like that. I ran 25 mph in 2nd gear, no heat issues. In that case, every type truck was stuck at 20 - 25 mph due to the road.

May 19, 2024 | 03:26 PM

OBS460

Logistics Pro

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From: Everywhere and nowhere

I've hit 242F on my 10R140 in my 2022 F350 7.3/4.30s. Still well within spec for Mercon ULV. I did have my trans filter and 14 or 15 quarts of fluid changed at 37k miles.

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May 20, 2024 | 08:53 AM

TexasJackKin

Thread Starter

Mountain Pass

Joined: Jan 2024

Posts: 144

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Quote:

Originally Posted by 2019er

Did that gas engine scream and whine and almost red line? Is the reason I bought a diesel. I've hit 230 F going up some steep hills hauling my 5,000 ish pound truck camper up them.

No, not at all. Droped to 7th gear now and then. Had one grade that I got stuck behind a line of trucks doing about 45MPH until a spot opened up to pass, and I got my foot into it droped all the way to 5th gear, and I was doing about 75MPH when I pulled back into the slow lane after getting around them, I didn't see what the RPMs were doing as the lanes in that stretch were kind of narrow, it was spinning up though. No drama or screaming, just some nice V8 rumble! I love this engine! that last "Big Block" V8 I had was a Chevy 454 in a "90 one ton pickup, that was a good combo, this is better!