I have a 2006 Dodge Dakota 4.7 with the 45rfe Transmission a few weeks ago I had started noticing problems with the Transmission going into limp mode and the check engine light coming on but once i reset the code everything started working fine. Three days ago it just stopped and i had trans fluid pouring out. So i got to looking around and found that the radiator busted internally and i had antifreeze in the transmission so i replaced the radiator and changed the trans fluid and filters. Once i got it all put back together it seemed to be fine, or so i thought. When the trans got hot it just stopped pulling all together but when it cools down it works fine. Please help i really don't want to have to buy an new trans

 

Did you do any kind of flush on the trans? I wonder if it's still contaminated.

 

I didn't flush it all I did was change the filters and fluid it runs fine until it gets hot

 

Coolant damages clutch packs. Sounds like yours is slipping once the oil gets hot.

 

I'm gonna try changing the fluids and filters again maybe still has some contamination in the trans. gonna add some transmission treatment when I fill it this time hopefully it fixes the issue .

 

Use OEM filters.

 

Will do

 

Either it's still contaminated, or the damage has been done. I did a search and read a couple threads on other forums - different vehicles that had the same radiator failure. Both ended with a transmission replacement.

I hope you see coolant in that oil and another change does the trick though.

 

I would think if the trans was shot then it wouldn't shift just fine when it's cold. So hopefully the change does the trick