Hi , I have noticed some rough riding( not engine related) in my car. It is clearly noticed when driving slowly in a well carpet road. This happened after I have done a rack repair along with replacing front wheel bearings. Mechanic said one side drive axle also worn out. What would be the cause ??. During the last repair changed rack bush ,rack ends, knuckle bushes, wheel bearings, lower arms. even if the axle was faulty did not changed as it is not yet in worst situation. Car_swift 2003 jeep