[GarRam1500]

Second time I took the Truck in for a check engine light. The light comes on secondary to starting the truck in the morning after putting it in reverse. The transmission hesitates to the extent that I put it back into park. Light comes on when I get it back into gear.

Dealer said that once the truck sits, the transmission pressure is lower than it should be and therefore it does not work until pressure builds. He is waiting for a tech from Chrysler to respond before taking the transmission apart..I am picking up the truck as he does not think this is a safety issue.

The truck runs fine otherwise and I do not have any other shifting problems. Only in the morning when I put it in reverse and only on occasion.

Anyone else having this issue that has better information than my dealer?

 

[ramvan2500]

Second time I took the Truck in for a check engine light. The light comes on secondary to starting the truck in the morning after putting it in reverse. The transmission hesitates to the extent that I put it back into park. Light comes on when I get it back into gear.

Dealer said that once the truck sits, the transmission pressure is lower than it should be and therefore it does not work until pressure builds. He is waiting for a tech from Chrysler to respond before taking the transmission apart..I am picking up the truck as he does not think this is a safety issue.

The truck runs fine otherwise and I do not have any other shifting problems. Only in the morning when I put it in reverse and only on occasion.

Anyone else having this issue that has better information than my dealer?

Did the idiots at chrysler even hook up the pressure gauges to the test ports on the transmission? Of course it's more involved then connect the gauge and turn the engine on you have to lift the rear end so you can put the trans in gear and get a pressure reading at certain speeds etc..

 

[TransEngineer]

Did they give you any fault code numbers?

This sounds like possible converter drainback to me. Replacing the spin-on cooler return filter (inside the transmission) could be the fix (if indeed you're getting drainback), but it would be helpful to know the actual code(s) it is setting.

This happens only on a cold start (after sitting overnight), and not after a warm restart, correct? Any problems if you put in Drive after the cold start (instead of Reverse)?

By the way, the RFE trans has no external pressure taps. Only way to check line pressure is by the sensor reading (or by using a special tool to tap in a mechanical gauge).

 

[ramvan2500]

Did they give you any fault code numbers?

This sounds like possible converter drainback to me. Replacing the spin-on cooler return filter (inside the transmission) could be the fix (if indeed you're getting drainback), but it would be helpful to know the actual code(s) it is setting.

This happens only on a cold start (after sitting overnight), and not after a warm restart, correct? Any problems if you put in Drive after the cold start (instead of Reverse)?

By the way, the RFE trans has no external pressure taps. Only way to check line pressure is by the sensor reading (or by using a special tool to tap in a mechanical gauge).

Ever since they put electronics in mechanics nothing but issues. I wouldn't of really known if the RFE had them or not I know they're electronic. I deal with the more primitive and popular of the torqueflites 46,47,48,727... Speaking of which I am probably going to go and pull mine off today and get it ready for a planetary replacement.