Spicer 80 Limited Slip Question
 

When I am going between 50 and 60 mph my truck has a vibration that comes and goes. It feels alot like a u-joint or wheel bearing, but all u-joints have been replaced and I checked wheel bearings when I replaced pinion bearings a week ago. I have a friend that has suggested that it may be the clutches in the limited slip. Has anyone got any info on limited slip or have any new ideas? :argh:

I'd also like to know this. I think some of mine is in the steering box.

Well here was my case.Vibration same speed about,front drive shaft u-joint replaced and balanced shaft,rear shaft u-joint replaced.Front control arms replaced.Vibration gone 0-to 120 mph.Pinion angle is very important in these trucks.