Driveshaft 'U-joint'

[av8mech240sx]

Has anyone had to replace the u-joint? I think mine has gone bad. I've had vibrating in the steering for 3 months now. Gone through all the BS of tires/blances/brakes/rotors....etc. Still hasn't fixed the problem. The whole steering wheel vibrates right between 45-80 mph and stops when I put in the clutch or take my foot off the gas. Sound like a driveshaft problem ? I asked drjohn this..he thought the same as me...the u-joint. How is that to replace....hard or easy? How much does it cost?

[GodDrivesA240sx]

Has anyone had to replace the u-joint? I think mine has gone bad. I've had vibrating in the steering for 3 months now. Gone through all the BS of tires/blances/brakes/rotors....etc. Still hasn't fixed the problem. The whole steering wheel vibrates right between 45-80 mph and stops when I put in the clutch or take my foot off the gas. Sound like a driveshaft problem ? I asked drjohn this..he thought the same as me...the u-joint. How is that to replace....hard or easy? How much does it cost?

I changed the center bearing in my old '89. It was easy. Don't know about a ujoint though, but couldn't be that much harder. A friend of mine changed his in his 88 k5 and it didn't take too long...if I remember correctly