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GC_chief

Well-known member
Posting to educate on new suspension design and to see if anyone has experience to add. Could be major issues attempting to modify wheel geometry (e.g. increase tire size), but on the plus side…the new GCL’s should ride like a sports car on pavement and have better articulation off road.


tl;dr
“With the Jeep Grand Cherokee L's new setup, the ball joint was moved to a virtual point. In the past, the pivot point was inside the vehicle, between the wheels. Placing the virtual ball outside the wheels gives the vehicle more lateral stability.”

"By moving the virtual ball more outboard, the vehicle is less sensitive to varying road inputs and vibrations to the driver, also providing additional stability and on center steering performance,"

Quadra-lift has a different steering knuckle but the design looks the same. Parts catalog isn’t detailed enough to see if clearances are any different.

68375450AC (r, air)
68375451AC (l, air)
68483788AC (r, spring)
68483789AC (l, spring)

live photos courtesy of yqtm@jeepgarage

also, speedkar99 has an awesome tutorial on ML suspensions (start at 10min):
 

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Fyerman69

Active member
It threw me the first time I saw this on the front wheel wells. I almost thought it was a camera or something before looking closer.
I doubt increasing wheel size by more than 2” would work without some type of modifications and spacers. I’d guess the virtual ball stays in the same relative geometry.
 

GC_chief

Well-known member
@MiSoProh, care to provide pics of your suspension… clearance between the steering knuckle and 21” wheels in particular. Fender clearance in park mode would be awesome as well! 🙏
 
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