Hello all, first post here. I have spent a great deal of time searching some possible causes of why my Pentastar motor stalls intermittently wile coming to a stop. Wondering where I should look next. It seems to happen after driving highway speeds, exiting the freeway and stopping. If I come to a stop over a longer distance, it will lurch and stumble. Tach bounces from 500-1000 RPM. It has ZERO codes. Little history:
122,000 miles, new battery and alternator. This motor has no MAF. I think it also has no EGRV. I cleaned the throttle body with no change. Swapped out with a used one, no change. Sprayed starting fluid around the intake looking for a leak with no change. Spark plugs replaced with 10 k. Found an engineer online talking about the TIPM, but what he describes is different than what I have going on. There is no dead battery issue or starter problem. Wondering how to diagnose a Vacuum leak somewhere else? What else am I not thinking of? Retired Chrysler mechanic suggested possible torque converter issue, but wouldnt it do it every time? Thank you for reading. Regards

 

Update for those of you searching town and country stalling upon stop. It turns out the torque converter is not unlocking, while slowing down. It was diagnosed with a tech in the passenger seat reading the scanner while I was driving. So the question now is, what is causing this. Is it the torque converter itself, or the internal solenoids? My options:
remove and replace torque converter
r&r solenoids
used trans swap or total rebuild.
I still haven’t determined what I want to do as it is still driveable anD I will be selling the car within 6 months. It will likely be the cheapest option between a swap and replacing the solenoid pack and torque converter. Solenoids start failing when they are warm so I may start with that.

 

I know a couple of Jeep guys who have had similar issues and it was a fault in the torque converter. On both occasions the lock-up clutch was sticking in the on position and would remain there for a while after they'd stopped. On both occasions they dropped the trans and replaced the converter.

As for the solenoid pack, I bought a reconditioned one from these guys, it was way cheaper than a new one and works great!

Phoenix Transmission Parts | eBay Stores

 

Thank you. I figured I would do both, since the trans has to come out