Need to put a gear box on my 09 JK. Stealership wants $1,000 and Salvage yard wants $400 for a used one. Are they worth rebuilding? Not sure if I can adjust the slack out of it or not. When holding the wheel straight is sways left and right. When turning into driveway the wheel jerks back and forth at full turn. Synergy Drag link and Ball joints less than a year old. Disconnected Stabilizer but still does the same think. Has 75K miles on her. Any suggestions?