[z21-i]

Use my Jeep mostly as a 3rd vehicle and for hunting. For 3 years know been running 3-1/4" suspension lift with 1-1/4 bl, Rancho RS9000's and have had no issues. This hunting season when I hit a washout on a dirt road or a rut (hard sudden hit) I get a noise, bottoming out kind of noise. Now I know my bump stops are not correct but never ad this issue before, no spring sag that I can see but when I adjust the Rancho's it gets a little better. Any weight in the back of the jeep makes it worse. Could this be a shock issue ? Spring issue ?

 

[Dextreme]

I would check control arm bushings and swaybar links.

 

[IslandTJ]

I'd also check your rear track bar...

When I last a similar noise, it turned out that I had a sheared transmission bracket.

 

[Jerry Bransford]

Could also be that a shock has failed and is no longer damping out the ups & downs at the rear.

 

[z21-i]

Could also be that a shock has failed and is no longer damping out the ups & downs at the rear.

I am thinking this is the issue but I will check the trackbar. I have had issues with the Rancho RS 9000 shocks on 2 different trucks, this would be the third. Rancho replaced them but still a PITA.

 

[DTMOOOO]

Also check the exhaust hangers, it could be your tail pipe smacking the tank or bumper.