Drive line Vibration

[MV8]

Small world. I was stationed at Whidbey.

This is much easier to use and see than the weighted pendulum, analog protractor we all grew up with. Some use watch batteries and some use AA batteries.
Pardon Our Interruption...

 

[Steve Kranz]

I'll check it out. Ordered the axle shims. Thanks!

Excellent idea! Will do! Thanks!

Plunge depth distance is WAY off. Yoke barrel is visibly too exposed. Appeared odd from the start. Measured about 2 inches from end of tail housing. (Seal is not the black extended type.) Way more than the correct 5/8 to 3/4. Possibly some wobbling? My shaft length is 44.88. Specs say 48.88. From each U-joint center.

 

[cpearce]

Plunge depth distance is WAY off. Yoke barrel is visibly too exposed. Appeared odd from the start. Measured about 2 inches from end of tail housing. (Seal is not the black extended type.) Way more than the correct 5/8 to 3/4. Possibly some wobbling? My shaft length is 44.88. Specs say 48.88. From each U-joint center.

That WILL be a huge contributor to a vibration.

 

[Steve Kranz]

Time to get shafted! The right one this time!

 

[Detroit Iron]

I'm checking in to see if @Steve Kranz got this resolved, but I wanted to add something. If the seal being used in the type with the extended dust boot, then I'd assume the slip yoke should be almost butted against it. Correct?

 

[Skeeter007]

This was my experience with driveline vibration. When we re and re’d the centre section of our 8.75 we accidentally didn’t centre the universal joint caps. I mean it was a hair off. When we took off down the road it was fine. Then out of nowhere the vibration started. We were stumped. We put it back on the hoist and inspected it. I felt a little bit of wiggle in the rear UJ. It turned out the cap wasn’t all the way seated. When we hit a bump or something the shaft went ever so slightly off centre and the vibrations started. Undid the straps and recentred. Rookie manoeuvre that we should have caught on the hoist. Anyway that was our story.