Bought a cardone rack n pinion for a 2007 Chevy Silverado lt 4x4. Installed n was fine for 4 days use time. Customer called n had to do a road call, had a leak at center area, got to breakdown n found leak had no idea why. This was supposedly an exact fit unit, come to find out that the shorter fluid transfer tube was such an arch that when bolted up it hit the bottom steel plate that is bolted to oil pan for protection. Pinched area above o ring n cracked it. Had to drop unit pull steer tube, go to hydraulic shop where they cut recrimped new tube end then braze or silver soldier it. Reassembled n should be complete. Exact fit my #ss.