I want to replace the two piece driveshaft in my 2001 Frontier Crew Cab with a one piece unit. I have replaced the carrier bearing once in order to cure a drivetrain vibration. This cured the problem for several thousand miles but the vibration is back and I suspect the carrier bearing again. I figure I can fix the problem permanently by going to a one piece driveshaft. I have looked locally and haven't found anyone. I am now looking for someone who can make one and ship it to me.