2015 Durango Limited Having issue, first problem P0731 DTC would not shift out of first gear. 96663 miles, changed oil and filter, inspected pan and it was perfectly clean and oil was like new. Drove for another 400 miles no problem. Then was coming to a stop, transmission locked in D3, shift to reverse and it flashes the R on dash and the **** R led DTC codes P0729 P1D8F P1D96. From park to D, instrument shows it cycling from D1, D2 then stops at D3 before even moving. Stayed that way while at the garage checking all cables etc. Decided to send to dealer for transmission replacement. Got in to move the vehicle into position for tow truck and guess what? Everything worked normal. What is y'alls thoughts? One DTC code was P1D48 and it isn't listed anywhere! Cleared codes, it immediately came back with a P1D96 and the vehicle wasn't even moving.

 

Okay P0729 is gear ratio in 6th gear, P1D96 is Gear ratio error Clutch A or B, P1D48 is not a code. It maybe P1D78-00 which is for a park solenoid. Your biggest problem is code P1D8F-00 Incorrect or Defective clutch 1. That is an internal problem with the transmission. Do you know where to get the transmission out park to move it?

 

Yes I do..... P1D96 is in the same category I believe, looking for slipping clutches etc. Why would the TCM generate a P1D96 code if the vehicle is not moving?
And I saw the P1D48 code myself.....gibberish from the TCM? I am having the valve body/TCM replaced. Before having it towed to the dealer, everything worked perfect, all gears and reverse without issue.

 

What transmission fluid are you using? 8/9 speed ATF?

 

Factory specified 8 speed transmission fluid. The original fluid was clean no smell along with the pan and filter with no debris or residue. Pan was imacculate!

 

Once the valve body is replaced you will need to program the Transmission module and how are you filling the transmission? Make sure your pins in the connector are not pulled back or has debris on the pins.

 

The repair is being done by a local Dodge Dealer....waiting on getting it completed. Soon I hope.

 

Thanks for the update.

 

Thank you for your input!

 

Hi,
Did the valve body replacement solved the issue?
I have exactly the same issue after overhaul.
After putting the shift on D1 it changes to D2 then it remains on D3.
Reverse is flashing R with no actual reverse.