What ever side the thicker and is on, that's where the pinion will get pushed. If its facing the front of the jeep, the pinion gets pushed down. If its facing the rear, the pinion gets pushed up. Now you can try to get the stock angles back that a stock DS needs. However, now you have the issue of the DS being to short and it'll pull down on the TC shaft. Going the HnT route and shimming the rear as needed is the best route

 

Alright. I guess I'm just picturing it wrong in my head. I understand it now. I'll take some angle measurements when I get a chance so I can really see what I have going on.

 

So this is what I'm working with currently. Didn't get a chance to take the angles yet, maybe I will be able to later today. But it looks like the rear pinion needs to come down some to get it parallel with the output shaft of the t case.

 

Ok, IF I measured them right, this is the angle at the output shaft of the t case. I measured vertically at the yoke. Flattest spot I could find.




And this is vertically at the yoke of the rear pinion.




And if it matters this is the angle that the DS is at.

So if the measurements were taken right then the rear pinion needs to come down 1 degree? What should I be looking to do? Keep in mind I have yet to put the rest of the lift on (.75" shackles and 1.75" front coil spacers). I was told earlier in the thread that the shackles would pitch the pinion further upward.

 

If your goal is over 4" of lift than in my opinion you will need a SYE. Not only to eliminate vibrations, but to keep from prematurely wearing out the u-joints.
Also, when lift height changes, the u-joints change position. This new position on old joints can cause an issue even if the geometry is correct.

 

I run 4.5" with a 1" transfer case drop. I have no vibrations but I also run this shim to correct the drive line angles. You will need this if you don't have it already.


http://www.rustysoffroad.com/jeep-su...teel-pair.html


I also wheel mine often and hard.

 

The leafs I currently have now came with what I believe is a 4 degree shim. The thick end is facing the rear and I think if I were to turn them around the pinion angle would be more to parallel to get by until I get a Hack N' Tap installed. Once I get the new shackles installed and retake the angles I'll no more. But the HnT is definitely a must do at this point. To be sure I'm rid of the vibes and to keep anything else from coming up later on if I decide to go higher again.

 

You can run it with the 6* shim and will be spot on. That's the one I run now. No vibes.

 

I may end up ordering those depending on how much putting the shackles on pitches the pinion up. Just to get by until I can do the HnT. Once that's done I won't worry about it anymore. HnT seems to be the best way to cure the vibes so that's what I'll go with. I just may have to do something with the shims until I can get it done.

 

That's what I am doing myself. Money is the only reason I haven't done the SYE right now. I cant do that and afford the axle at the same time so I am waiting until I can afford both at the same time. I also want the TW shaft so that is taking some time to save up for. But this set up has worked for me in the past and is currently working for me with no vibes or problems.

 

If not going to do as told by many why ask? You were told an SYE was needed along with shims (BOTH). But do what you intended from the start a TC drop kit isn't the answer.


Good luck anyway and hope you don't cause any more issues.

 

I never said I WASNT going to do what was suggested. Just because I'm not doing it right now doesn't mean I'm not gonna do it. I have ZERO time for what I need to do while I'm working full time and going to school full time and have a kid to take care of also. Plus a military career to uphold as well. So sorry if I offend anyone because I'm just trying to get it remedied at the moment before I get it done right. I never wanted to do a t case drop in the first place but that's was a quick fix for the time being. Cmon man...not everyone has tons of free time and funds to take care of things right away.

 

So I picked up a yoke and a double cardan drive shaft today from a guy parting out a 99 XJ. The bolt broke while he was removing it so I still need to find a bolt that so I can do a HnT. Is there a certain size I need?

 

Btw, I meant no disrespect Fred. I just have limited time to get stuff done currently so it's just a little frustrating trying to cram all the projects into a free weekend.

 

I did not either sorry, but you should have waited before going that high and knowing that would happen or I should say happens the vast majority of the time not using an SYE.


The list that has been posted time and again for things needed for a lift height as it relates to height is for real. BTY I needed shims even with my SYE as do a lot of us. Over a 3" lift costs a lot more money and parts.


Good Luck!