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Modified JK TechTech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.
PLEASE DO NOT START SHOW & TELL TYPE THREADS IN THIS FORUM
I had the same problem except I was using the teraflex BB and it was the rear passenger Bump stop the was mounted on the top of the axle. I mounted it backwards and it was making contact with the rear track bar.
I did the same thing jeepin08 did and also had a thump. Check your bumpstop it might be mounted backwards.