followup question(s) is the wobble due to bent axles shafts? if so, then wouldn't we feel some wobble at all speeds like at highway speeds?
why would hill start assist have anything to do with it? sorry, coming late to the game
Yeah we've covered this extensively in many threads, but I realize the info may not be easy to find, so I'll go quickly :
The wobble is not the result of bent axle shafts, or bent anything. We actually don't know the exact cause, because FCA hasn't revealed it, but we've pretty much narrowed it down to a few possibilities : because stepped shafts with narrower inside CV joints mitigate the shimmy, it's pretty obvious this *fix* changes the forces (rotational) in a way to prevent the oscillation from occuring.
And we have read that FCA are redesigning the front suspension and steering for 2017, so we suspect a design error is causing the wobble, or incorrect fit/tolerances somewhere in the transaxle. Since only a minority of AD1s have the wobble, it is likely a little of both : poor design sets the table and then if something is misaligned ever so slightly, the Jeep will shake.
It shakes within a very small speed window because of a frequency thing : the right forces at the right rotation speed under the right load (throttle).
What do Hill Start Assist and ERS have to do with the wobble ? If I could answer that... Basically, we have no idea and no one at FCA is talking.
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(goes well with my forum status and overall temper
2015 North (Canada) - V6 - AD1
Cold, Tow, 8.4A, 9 speakers with sub