46RE Transmission over heating
Registered User
Joined: Jul 2020
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I have a 99 dodge ram 1500 v8 5.9L 4x4 with a 46re transmission. I rebuilt the transmission 2 years ago and has ran great since recently. the truck will drive great until about 15 min down the road, when the truck is warmed up and the overdrive will turn off and shortly after that the trans temp light will come on and it stays in limp mode until its cooled down...ive replaced the radiator because the transmission cooler is in the radiator. i replaced the wiring harness on the valve body 3 times and I have replaced the engine coolant temp sensor, and i have removed the checkball in the transmission cooling line and anfter i put everything back together it still turns the overdrive off and is still acting like the transmission is overheating and the transtemp light comes on shortly after the overdrive turns off. any ideas?
Administrator
Joined: Apr 2010
Posts: 87,464
Likes: 4,220
From: Clayton MI
Hello. I have a 2001 Dodge Ram 1500. Something similar is happening with my Truck. Around town it drives fine. But driving it on the Highway about 20 minutes out the Trans Temp light comes, THEN the O/D off light. Took it to a shop to have it serviced, they said they fixed it but apparently not, because it still does it. And the last time I drove it it feels like the transmission is acting up. Does not drive as smooth as it did. And I don't know jack squat about Automobiles, so have not clue what people are talking about. I have no idea what to do. Any suggestions.
Professional
Joined: Aug 2015
Posts: 100
Likes: 2
It could also possibly be the trans cooler if one is equipped. Mine was clogged. Usually after a rebuild it needs to be replaced. They sometimes clog either way. Seems these transmission run high to begin with. Temps of over 200 degrees are common. I cut out my trans cooler, replaced it with a bigger aftermarket cooler.
