RPM Dropping to near 500 when stopping and shaking truck

[sag2]

Try putting the truck in neutral before coming to a stop if you haven't tried that yet.

Did you ever try this suggestion?

 

[Tuesdak]

Did you ever try this suggestion?

Thanks for the reminder. (Couple three weeks in dealer service departments.) I gave shift to "N" a try a couple times when stopping.

Instant unloading from pushing the truck on the brakes.
RPM comes back up immediately.

The Edge Monitor also has a couple clues. IDK if the gear indicator is "Commanded" or "Actual".
At a complete stop it's indicating gear 2 at times.
Engine Load when stopping is over 30%. A/C Off.
On take off the engine power surges and then drops then comes back on as it 'finally' gets into 1st. It's a cargo shifting event when trying to gently take off.

I get the feeling it's bound up in a gear and can't downshift to 1.

 

[riki5156]

That shake at shutdown is Dodge's auto eject system.Come to a stop open the door and shut off the engine. It will assist your exit.

 

[TDRAdmin4]

Opened due to user request (an update of the topic)

 

[Tuesdak]

So this has been situation normal for a couple years now, the RPM falling to near 500 when stopping.

Yesterday it added something new. I felt like the engine was missing at idle. The tach was surging slightly. Like when the FCA is binding up and needs to be replaced. When I got to a parking lot and turned on the 1200RPM high idle it was also moving the tach needle instead of it's usual steady reading. Then the problem resolved itself.

With just a little over 60K on the clock I feel it's a little too soon for needing a FCA?

 

[Grumpy8811]

So this has been situation normal for a couple years now, the RPM falling to near 500 when stopping.

Yesterday it added something new. I felt like the engine was missing at idle. The tach was surging slightly. Like when the FCA is binding up and needs to be replaced. When I got to a parking lot and turned on the 1200RPM high idle it was also moving the tach needle instead of it's usual steady reading. Then the problem resolved itself.

With just a little over 60K on the clock I feel it's a little too soon for needing a FCA?

curiosity? does it do it in neutral and Park or only when in gear? ( NOTE I didn't read all the other replies)

 

[Tuesdak]

curiosity? does it do it in neutral and Park or only when in gear? ( NOTE I didn't read all the other replies)

New problem, tach surging RPM, does it in park and drive. You can only manually high idle when not in gear like in park.

The dragging the engine RPM down only happens in drive when stopping. If I pop it out of gear the RPM instantly recovers.

 

[Grumpy8811]

New problem, tach surging RPM, does it in park and drive. You can only manually high idle when not in gear like in park.

The dragging the engine RPM down only happens in drive when stopping. If I pop it out of gear the RPM instantly recovers.

anybody ever look at the speed signal from the crank position sensor and see if it is erratic,maybe on a the graph scale to see if signal is clean.also compared it to engine speed reading using an electronic tach?
other than that maybe something like the torque converter clutch isn't releasing?
definitely unusual behavior in something electronically governed.