Hello, Does this pinion angle look ok? 2004 TJ non- Rubicon. 2.5” lift with Moog factory length control arms. TC case dropped about 3/4 inch. Trying to eliminate driveline vibration.
Check for excess play in the output shaft and the yoke. Also with the shaft out and in 2WD put it in gear and see if the output “wobbles” like its bent.Pulled rear drive shaft and ran it up to 65mph on the highway. Vibes are gone. It is either rear drive shaft or possibly new gears.
Got any pics of the adjusted pinion?Update - Installed adjustable rear control arms. I lowered pinion angle quite a bit. The flat spots on the back of the the rear differential are now at the same angle as the harmonic balancer on the TC output shaft. Unfortunately the vibration is still there. Comes on at 40 mph and gets pretty intense as you get up to 60+mph. The vibration intensity increases when you are accelerating our going up hill. When you let off the accelerator the vibes are reduced significantly. The new pinion angle completely eliminated the 1st gear shudder I had when taking off from a dead stop. First and second gear are soo smooth. Wish I could stop this high speed vibe.