Not sure if I should have put this in the "Transmissions" section, but being new to a 2013 F150 with the Eco engine and 6 speed trans, I'll start here and if the mods think it'll be better in "Transmissions", so be it...

Where is the trans temp that displays on the "Gauge Mode" digital screen taken from? Is there some sort to "T-stat" for the trans fluid too?

I'm just driving normally on the hwy or in stop and go traffic and it gets to 190*.. I know the cooler is up front and in stop and go if the electric fans are not going, it's not going to have much air flow, but even on the hwy?

What's it going to be when it's 95* outside and I'm towing my travel trailer?? Or hauling up that 6% grade??

I had a trans temp gauge in my old 97 that was taken from the trans output line and that thing would barely move in the winter time and maybe get to 160* in stop and go traffic. The most I've seen it go was 210* hauling up that 6% grade and it was 95* outside...

I guess I'm just used to seeing the old one and not ready for the new one yet..

So, assure me I'm going to see 300* temps when I hitch up my trailer!

Thanks!

Mitch

 

Hi Mitch!

Different tranny (tightly packaged 6R80) different fluid (Mercon LV), different operating temps.

What was considered 'hot' in a 4R75E is considered 'normal' in yer truck.

There was a discussion concerning this a couple years ago - that was the consensus.


MGD

 

Thanks MGD... If I'd just done a search first.... https://www.f150online.com/forums/20...n-temps-2.html

Should have figured I would not be the first one to discover this! ha, ha!!

Mitch

 

Normal on this tranny is in the. 190s although low 200s wouldn't be cause for alarm. Shortly after getting my 2011 I was hauling a car on a trailer made for tractors. I would estimate there was 6000-6500 or so behind and of course I wanted to see what this little V6 could do. There's a steep hill on the freeway along the way so that was my test. I was running 60 or so at the bottom, it was sunny and about 90* out with a tranny temp of 192. I put the skinny pedal to the carpet, if something happened I was under max weight and under warranty. Less than halfway up I had to lift, I was pushing 85 and climbing the tranny was now at 194*. I was satisfied. It's strange at first to see it that high compared to the old trannys but that's just how it is. Hotter fluid flows better so I suspect that has a lot to do with the design.

 

Yeah, lots of things I'm going to have to get used to with the new compared to the old!! That's what happens when you go from one century to another with technology!

Thanks,

Mitch

 

When traveling unloaded when the truck has been running for an hour or more I've seen my temps between 195-199°. When I first saw that I thought it was running hot but, I saw other threads that lead me to believe it's normal. So it's normal OP!

 

Mines 190 to 195 driving unloaded .. Today a pulled my trailer to san antonio and back with a 30 mph headwind and headed up several 7 percent grades the most i saw it reach was 201 and it quickly dropped back down to 195. No worries..

Im sure your going to love the tow haul mode, a little different then just od off like in your old truck.

 

Thanks for the reassurance guys! I'm like a "Babe in the woods" with this new truck!!

Mitch

 

Just got back from a 2400 mile trip to Moab, and hit some serious temps towing over the mountains:

Going over mountains in Northern Colorado, hit 231 on transmission temp for about 10 minutes. Trying to decide if a fluid flush is warranted now. 230 is getting close to breaking down the fluid.

 

That seems a bit high to me. Seems like I read somewhere that a warning light would come on at 225, but now I can't find where I read that. Maybe I dreamed it.

How many miles on the ol' gal now?

 

I would do more checking before doing that. The new trans fluid is much more stable at higher temps than the old stuff. Mercron LV has a flash point of 80-100* higher than Mercron V.

 

Only 56458 on odometer today! No engine light came on, and if I wasn't doing switchbacks on the mountain pass I would have took a dash shot to show the temp. I was down in 1st gear too on 139 (Douglas pass road) going up to the dinosaur national monument.

 

http://www.amsoil.com/shop/by-produc...?code=ATLQT-EA

 

The Mercon fluid used in your transmission is tested at 302F for 83 hours. The test has 20,000 clutch cycles at 88 joules per CM2. In most cases, ATF mirrors coolant temps. Your old tranny at 160F was too cold and I'm surprised you didn't have seal issues. Ideally you want the ATF to run between 180f and 200F. It's when temps get over 230F you need to back off and let it cool down. There is no need to change it. ATF is more like hydraulic fluid in that it doesn't see combustion gases or acids. It can last a long time.

 

I was hoping "The Nerd" would chime in.

Question = answered now.

Thankee, Labnerd!