There does seem to be a little tiny amount of runout on the shaft. But before sending the driveshaft out for work, the rear u-joint is centered in between the nubs in the rear pinion yoke? And you've got the rear pinion angle correctly set? Have you tried varying the rear pinion angle a tad either way?
Do you have a photo that clearly shows the entire rear axle forward up to the CV to see the angular relationship between the pinion and driveshaft?
Yes, since the driveshaft angle lowers when you lower the pinion angle. No need to even test at 3 degrees below that of the driveshaft angle, that's way too low. I'd have the pinion angle maybe 1 to 1.5 degrees lower than the driveshaft but that's it. We don't need to get it lower than that since our TJs don't have much axle wrap like leaf spring Jeeps do.Jerry you have given me reason to ask another question. When setting the pinion angle to be below the drive shift angle do I measure both each time? when perfectly aligned the drive shaft and pinion angle are both at 18 degrees. When I begin to move the pinion angle down do I re-measure the driveshaft angle each time and continue until the drive shaft is 3 degrees below the ne drive shaft angle or do use the 18 as a benchmark so new setting would be 15 degrees?
The come and go like a sin wave at some speeds and are constant at other speeds. Increase with speed.I feel your pain brother! Do your vibes come and go like a sin wave? Worse the faster you go or same?
I'd stick with nothing more than that 1.5 degree difference. Neither a 3 nor especially a 4 degree difference is going to do anything but make vibes worse.
Have you disconnected the front of your front driveshaft to eliminate that as a possible cause of the vibes? You can support the front of it for the test by zip ties, cord, etc.. There's no need to actually remove it for this test.
Yes i did. It was the output shaft from the transfer case was not true. I replaced it
I took it back apart, had put in an sye, and took it to a machine shop to have it checked. I was checking everything that was dine to it before the problem started. Checked drive shaft, axles then sye.How did you end up discovering that?
Advance adaptersWhat sye did you use that had the bad output? I have the same dri e shaft and vibes are violent. Wobble is a bit worse as well. Done everthing and bout to lose my mind.