Join Date: Jun 2014
Own a Commander?: Yes
Model year: 2006
Trim Package: Limited
Power-Train: 5.7L V-8 Hemi
If 4WD - system: QD-II
Current Mileage: 113676
Possibly alignment for the shimmy would be my guess, or old (not necessarily worn) tires. Maybe even worn bushings in the steering somewhere. I think I get it some times as well and these are all the things I've considered knowing that all these things on mine are getting a little long in the tooth.
For the clunk, check out where the exhaust goes over the transmission support beam. Right under the passenger front seat, in front of the muffler. There is an exhaust bracket up there that mounts to the transmission. May be an issue with that bracket. There's also not a lot of clearance for the pipe at that tranny support. I actually had to "crush" that beam about a 1/2-3/4" for my aftermarket mids to not constantly rattle and bang on it.
2006 Dark Khaki Limited, Hemi, QD-II w/ all the options.
Inertia Performance Heads, Full SRT 6.1 Valve Train, Custom Crower Cam, Double Roller Timing Set, Trend Performance forged Pushrods, High PSI Oil Pump, ARH Long Tube Headers and Mids, Borla Catback, aFe Stage 2 Intake, AEM X-Series WB UEGO & 100psi Oil Guages, PowerStop Drilled & Slotted Rotors, MDS On Light, Kenwood in-dash Nav, HID Projectors and full LED lighting upgrade
Need to get it on a dyno....