trans. temp warning @ sustained high speeds?

[New recaros]

Has the transmission been serviced (drain/refill) at any point to your knowledge? These transmissions are very sensitive to the correct fluid level. If the dealer/shop overfilled it you’ll have symptoms of overheating under load and possible fluid venting.

Ok FTO, why would over filling the tranny cause over heating? I can’t see that happening, shifting issue sure, please explain.

 

[EricEst1978]

Has the transmission been serviced (drain/refill) at any point to your knowledge? These transmissions are very sensitive to the correct fluid level. If the dealer/shop overfilled it you’ll have symptoms of overheating under load and possible fluid venting.

I purchased the truck less than a year ago at around 39k miles and it’s at 47’ish now. Transmission was serviced in February, at around 44k miles along with an oil change, and some other recommended maintenance.

 

[Meat2022]

Ok FTO, why would over filling the tranny cause over heating? I can’t see that happening, shifting issue sure, please explain.

he said why...I'll quote major payne....these transmissions are ....

 

[FordTechOne]

Ok FTO, why would over filling the tranny cause over heating? I can’t see that happening, shifting issue sure, please explain.

Fluid expands as it heats up. If there’s nowhere for it to go due to being overfilled, it becomes aerated, which interferes with fluid flow and cooling.

 

[FordTechOne]

I purchased the truck less than a year ago at around 39k miles and it’s at 47’ish now. Transmission was serviced in February, at around 44k miles along with an oil change, and some other recommended maintenance.

Bring it back to the dealer or shop that serviced the transmission and have them adjust the transmission fluid to the proper level.

 

[New recaros]

Fluid expands as it heats up. If there’s nowhere for it to go due to being overfilled, it becomes aerated, which interferes with fluid flow and cooling.

Ok, I understand that aerated fluid does not cool well. Air bubbles don’t transfer heat well. Thanks for the explanation!