when it jerked with the CEL, did it basically freewheel into neutral?
I had this happen on my car (2011 R/T)...was a vehicle speed sensor to crank sensor comparison fault. ended up being a broken valve body support bracket internal to the transmission. it's not super common, but not totally rare. what happens is as the torque converter lockup clutch breaks in (friction material to pressure plate), it can "sand" the pressure plate side a little, causing debris to circulate through the tranny. that debris can cause some of the valves in the valve body to stick, until pressure build high enough for them to violently release, and it breaks the VB support bracket, and can damage the VSS.
like I said, it's not common, but it's not super rare, as my car was the 4th they'd had in for this issue since the release of the LX's in 2005. the other 3 happened to be police chargers....and it's common enough that the support bracket was on national back order, and had to be procured through a transmission rebuilder (who apparently buys up most of chrysler's stock of this bracket) the fix is to replace the bracket, and flush and inspect the tranny. if it happens again, they replace the torque converter, too.
'11 Toxic Orange Charger R/T
'06 Dodge Grand Caravan
'76 Plymouth Duster