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My 2018 2500 with 36k miles went into limp mode for 250 miles. No warning lights or other signs. Added 3/4 of a quart of fluid as it was low. Seem to take care of it as went back to shifting normally. Dealership has no ideas on where the fluid went or why it did what it did. Or even if the addition of the fluid did any help. It does seem to lag on the 3 to 4 shift now. Tech said the fluid smelled a little burnt. But not able to tell for sure and didn't want to flush the old out. They want me to bring it in next time it happens. I was unable to the first time or I would have. Any ideas?
 

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My 2018 2500 with 36k miles went into limp mode for 250 miles. No warning lights or other signs. Added 3/4 of a quart of fluid as it was low. Seem to take care of it as went back to shifting normally. Dealership has no ideas on where the fluid went or why it did what it did. Or even if the addition of the fluid did any help. It does seem to lag on the 3 to 4 shift now. Tech said the fluid smelled a little burnt. But not able to tell for sure and didn't want to flush the old out. They want me to bring it in next time it happens. I was unable to the first time or I would have. Any ideas?
We certainly understand why this would be concerning. If you are not able to determine a solution based on suggestions from fellow forum members and you decide to address this with your Ram dealer, please be sure to follow up with us via private message. We would be more than willing to escalate your situation to a specialist who can work alongside you and your dealer while your truck is in service.

Mark
RamCares
 

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My 2017 2500 with 36k miles has similar experience - it has leaked transmission oil since the beginning from the oil pan joint. It appears the joint was sealed with a forming gasket, and it is not sealed all the way tight. I've had to add transmission oil also. This is the 66RFE transmission behind the 6.4L HEMI engine.

My plan is to periodically check and add transmission oil until 50k miles when I will change the oil, scrape the old gasket material off, and apply new permagasket sealer. I might swap oil pans to the aftermarket Dorman Pan with oil drain plug.
 

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Discussion Starter #4
My 2017 2500 with 36k miles has similar experience - it has leaked transmission oil since the beginning from the oil pan joint. It appears the joint was sealed with a forming gasket, and it is not sealed all the way tight. I've had to add transmission oil also. This is the 66RFE transmission behind the 6.4L HEMI engine.

My plan is to periodically check and add transmission oil until 50k miles when I will change the oil, scrape the old gasket material off, and apply new permagasket sealer. I might swap oil pans to the aftermarket Dorman Pan with oil drain plug.
Mine has no visible leeks as they checked as well as I did when I filled it. And nothing came out of the filler tube as mentioned on other threads. Not the best answer to get but at least its documented.
 

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Discussion Starter #5
We certainly understand why this would be concerning. If you are not able to determine a solution based on suggestions from fellow forum members and you decide to address this with your Ram dealer, please be sure to follow up with us via private message. We would be more than willing to escalate your situation to a specialist who can work alongside you and your dealer while your truck is in service.

Mark
RamCares
Thank you, I understand that the dealership couldn't duplicate the condition and there wasn't any codes logged. The tech thought that the amount of fluid wouldn't make it go into limp mode. I'm going to monitor it closely and if it goes into limp mode again hopefully I'll be close to the dealership.
 

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Does it shift hard sometimes? My 2018 2500 did that. The dealers always said they could never duplicate the issus. After the warranty expired mine went in to limp mode. I took it to the dealer. They replaced the solenoid pack under warranty.
Now a couple of thousand miles later my truck has a grinding sound from the transmission/bell housing area. Dealer is asking for $905.50 just to open it up and look at it.
I would stay on the dealer to figure this out before your warranty is up so you don't have to fight RAM about a faulty transmission.
 

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I went with a stock tune that improved the shifting - shifts are tighter yet smoother - no jerking or clunking. 66RFE isn't known as a great transmission.
 

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I went with a stock tune that improved the shifting - shifts are tighter yet smoother - no jerking or clunking. 66RFE isn't known as a great transmission.
What stock tune are you referring to? Dealer or aftermarket? Thanks
 

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Aftermarket. By "stock" tune we mean an aftermarket tune that is off-the-shelf......not a customized tune for you specifically. OEM tune is what's in the ECM from the factory.

The stock tunes I used are from Edge Pulsar. I'm not looking to build an ultimate race truck or anything. Just optimized tunes for fuel economy and towing.
 
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