Need Help – 2019 Ford Expedition XLT 4WD (Tow Package) – High Transmission Temps

[omandave]

We had the same thing happened in our 2019 Expedition Limited back in November 2023 (we have the HDTow package with the eLSD diff in back)...
anyway. I did the thermostat swap myself becuase of time and dealership lead time to even look at it. bought the new parts off of Rockauto:

2019 FORD EXPEDITION 3.5L V6 Turbocharged
MOTORCRAFT​	RT1252	Thermostat	$ 21.79​	$ 0.00​	1​	$ 21.79​
MOTORCRAFT​	RG640	Thermostat / Thermostat Housing / Water Outlet Seal	$ 4.67​	$ 0.00​	1​	$ 4.67​
MOTORCRAFT​	VC13G (VC13DLG)	Coolant / Antifreeze Type: Prediluted	$ 12.32​	$ 0.00​	2​	$ 24.64​
Discount​		$ -2.56​
Shipping​	Ground	$ 10.99​
Tax​		$ 5.24​
Order Total​		$ 64.77

this was shipping to WA state... 64.77 out of pocket and some time...

It has run cooler ever since!
cheers!

 

[Calidad]

If your dealer refuses to address the faulty thermostat under warranty or gives you a “daddy needs to pay his 911 4S payment” replacement cost.

Just say no thanks I’ll have a trusted shop do it at shop rates for 1hr labor and I’ll file for reimbursement with Ford. This does two things!! It calls BS on their crazy ass charge, lets them know, you know its a hour or less shop job. Plus if Ford HQ gets wind the dealer can’t service its vehicles at shop rates then why are they a Dealer?

Makes the dealer look bad 3ways!!!
The top indie shops here in CA that do really good work run about $190 hr shop rate plus parts cost. They also are very good at looking up the book time and telling you. Unlike ALL dealers service sales none of those idiots even know what book time is.

 

[johnk]

Thanks - is the new design an updated Ford T-stat with a new part # (different than the original T-Stat #) or is it an aftermarket T-stat?? What is the temperature rating of the new one??
Thanks

 

[Calidad]

Thanks - is the new design an updated Ford T-stat with a new part # (different than the original T-Stat #) or is it an aftermarket T-stat?? What is the temperature rating of the new one??
Thanks

Its a ford part updated design. Don’t buy aftermarket thermostats. I’ve never seen any work well. Stick with oem

 

[johnk]

Great - thanks so much.

 

[Calidad]

Quick update pulled my 8700lb boat yesterday through heavy stop and go traffic then up a respectable grade. Transmission temps peaked at 214 in the heaviest traffic and stop and go then cooled down 205 while climbing a decent hill. Prior to the thermostat replacement traffic had me running 227 with very poor cooling ability just letting it idle for 20 minutes only brought it down to 210. Definitely big
difference in lower temperatures and better heat management.
If your 18-22 and see 212+ temps on the transmission not towing anything just normal use the thermostat is sticking/failing get the redesigned one installed. I suspect mine was failing around 68,000 and by 75,000 it was starting to trigger 234 coolant temperatures on the engine temp.

 

[Calidad]

Quick update
For comparison. I just hauled my boat 8700lbs 190 miles over a 7400ft pass.

I used a buddy’s 2024 F250 6.8l 6spd.
Flat highway 55mph 205 transmission temp. Power difference was wild!!

The 6.8 revs!!! To get even remotely similar acceleration with my boat vs the Expedition the 6.8 is reving 3500-4500rpm. Vs the Expedition your in the 2000-3000 range. Its a weird thing after lots of miles in the Expedition.

9mpg in the Expedition vs 6.6mpg in the F250 6.8L

However!!! The F250 could care less about cooling capacity. I literally watched the transmission temp drop from 210 to 200 on the biggest climb at 40-45mph at 3500rpm. My Expedition with failing thermostat on that climb was at 230 and stopping I couldn’t really get it to cool. Ended up getting a tow company with a pickup come drag my boat 19 miles over the pass.

Maybe next yr I’ll try hauling with the Expedition (new thermostat) with the F250 running backup . See how things go.

Definitely get that crap thermostat replaced with the updated one.

Oh and the F250 6.8L is a beast! Kinda want one

 

[David 20152]

We had the same thing happened in our 2019 Expedition Limited back in November 2023 (we have the HDTow package with the eLSD diff in back)...
anyway. I did the thermostat swap myself becuase of time and dealership lead time to even look at it. bought the new parts off of Rockauto:

2019 FORD EXPEDITION 3.5L V6 Turbocharged
MOTORCRAFT​	RT1252	Thermostat	$ 21.79​	$ 0.00​	1​	$ 21.79​
MOTORCRAFT​	RG640	Thermostat / Thermostat Housing / Water Outlet Seal	$ 4.67​	$ 0.00​	1​	$ 4.67​
MOTORCRAFT​	VC13G (VC13DLG)	Coolant / Antifreeze Type: Prediluted	$ 12.32​	$ 0.00​	2​	$ 24.64​
Discount​		$ -2.56​
Shipping​	Ground	$ 10.99​
Tax​		$ 5.24​
Order Total​		$ 64.77

this was shipping to WA state... 64.77 out of pocket and some time...

It has run cooler ever since!
cheers!

Thanks for the info! My dealer quoted me $950 just this morning citing a labor intensive effort. The tech told the service advisor that it would take a half day or more.

 

[Calidad]

Thanks for the info! My dealer quoted me $950 just this morning citing a labor intensive effort. The tech told the service advisor that it would take a half day or more.

Its literally two bolts takes a tech about 15 min. There’s almost enough room for them to stand between the radiator and the thermostat housing while replacing it.

These dealers are freaking ridiculous

 

[Calidad]

How to install a new Thermostat 2019 F150 Ecoboost 15+ Mishimoto 160

160 degree mishimoto thermostat install

m.youtube.com

I would stick with OEM thermostats!! I have never had good results with aftermarket ones.

This video shows where it is. Its a simple job. Dealer tech can do these in 15-20 minutes easily.