RPM's drop or stalls when put in gear on a cold start

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Montreal,Quebec,Canada
I have a 2014 Jeep Wrangler automatic with 110K miles.

When it is cold outside (
But then I throw it in reverse to back down the driveway and either the RPM's drop for a few seconds and it "shudders" then goes back to normal, or on occasion it will actually stall out. When it stalls, I put it back in park and it starts right back up and then there is no problem the rest of the day.

It only does this when started cold, like from sitting overnight.
No check engine light and nothing reported by ODBII

Throttle body is clean clean, plugs are new, air filter new

Some people said it can be the torque converter solenoid, is it located inside trany ?

Any idea what I can check ?
 
You'd have a very harsh ride if the torque converter was not unlocking.

First place to check would be dirty throttle body if its drive by wire, or the IACV if equipped with that type of system.
 
I wonder if fuel pressure is slow coming up? which doesn't make sense to me.

Coolant temp sensor? Maybe it is telling the ECU it is warmer than it really is.

Hmm, this probably happens before it goes into closed loop? Was wondering if one could tell by if it went rich or lean.

Drive by wire, right? I wonder if the throttle valve needs a bit heat? Maybe it has some gunk on it?
 
Likely need your torque converter replaced..see:

https://www.google.com/amp/s/www.wranglerforum.com/f202/rpms-drop-or-stalls-when-put-in-gear-on-a-cold-start-1895025.html%3famp=1

Skip to page 6. Call a couple dealers, maybe see if a recall exists?
 
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