normal driving no problemo! my car was traded at the benx dealer in nanuet ny, sombody? had the plate off, bolt holes were full of sealant. new rear is 3700 bucks plus labor at benz dealer. guess they traded it. I did not tell dealer, figured it was easyer to fix it myself . If you get one from junk yard pull the seals and snap rings, take out the ring gear and carriage. clean. mine came full of dirt and stuff. royal purple syntetic gear oil is good enough. still have old housing, would like to jam 3.55's into her need to figuer out the buck rodgers space jyro stable electronic stuff.