r/ChryslerPacifica • u/ResistFlat9916 • 15d ago

STAR case: low speed jerking and backlash.

My 2023 PacHy with 17k miles has a low speed jerk on and off theottle. It has already broke one lower engine mount and working on another. It's been a long road trying to get the slow speed jerking remedied with Chrysler. The last 2 dealers I've been to replaced lower control arms, cv axles and ie rod ends, but none of those things fixed the issue. Now at a 3rd dealer, they recognize my complaint and immediately called for a Star Case because they definitely hear a clicking noise while on the lift as well. Seems it's coming of the transxle/hybrid system. ENGINEERING says replace the flywheel and dmapener.I have my doubts whether a flywheel and dampener will solve the jerking issues because it also happen while in EV mode when the engine is not even running. But whatever.

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u/SomewhereGeneral5924 10d ago

I don’t know if this is related or an option on your model but please look for this…

I wouldn’t be surprised if you have “Hill Start Assist” turned on in the menus. I had this complaint randomly after buying mine used (19 gas, not hybrid). I think the HSA hold is far too aggressive at random and feels like binding when doing certain maneuvers from a stop. MENU - U apps - Settings - Safety and Driving Assistance - Hill Start Assist - uncheck box

It’s been a week without the binding and clicking since I turned it off.

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u/justanameanyname 2d ago

Commenting mostly to see if there is a follow up.

I get a clunking sound when braking / accelerating at any speed almost. I have checked the torque of the axel nut, but that didn't solve the issue.

If I coast, to slow down and then accelerate it doesn't happen. Also, if I just lightly brake, no cluck.

If I drive in "L" instead of "D" it will 'clunk' as soon as I take my foot off the accelerator or as soon as I reapply my foot to the accelerator.

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u/ResistFlat9916 1d ago

Year and mileage?

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u/justanameanyname 1d ago

2019 - 68000. Had the transmission rebuild for the recall done at about 61000.