I'd be looking at some new arms,it's the only way to get the vibes out.Until then i won't drive it

 

Double Cardan goes on transfer case side. Single Cardan goes on differential side. The shaft angle at the differential pinion (single Cardan end) needs to be close to zero or you will get vibration. As a single Cardan joint (U-joint) rotates the output shaft is forced to speed up and slow down relative to the input shaft. The bigger the angle between the input and output shafts the more vibration is created. This angle caused vibration is much reduced by using double Cardan joints. True Constant Velocity (CV) joints (like on stock rear shaft) don't exhibit this vibration problem.

I looked at the Powertrain web site but couldn't find much useful information.

Tom Woods also makes drive shafts and their site has loads of good stuff:
Tom Wood's Custom Drive Shafts - Tom Woods Custom Drive Shafts Custom Driveshafts Specialist

 

thats where im at with it, i feel like a newb im sorry

so the angle from the shaft to the pinion should be 0 is what i deciphered your reply as, that makes sense if so with a single cardan, again idk what control arms didnt punch me in the face the minute i drove around the block

 

The stock rear drive shaft with CV joints front and rear is far better than anything else on the market at speeds over 50 MPH. Their only problem is they are susceptible to damage from rocks , stumps and debris. If only someone offered some sort of protector.

You will note the front drive shaft has only one CV joint. That is because it is disengaged at highway speeds. With no load on it at speed, vibration is less an issue.

 

well that and they tear once you flex it out a few times, my rear was on its last legs the last few months and i just havent been driving it alot but since moving back south its alittle nicer so figured i would fix it but completely disregarded the arms, also noticed the front is starting to fling some grease........looks like a full set of arms is closer than i thought.......and high steer........and gears

 

well sure enough some adjustable control arms fixed her up. Had to go with some Rubicon Express adjustable uppers because northridge couldnt get me RK till next thursday and well its a nice weekend and i miss driving it, these things are well build though i must say, got it adjusted within about 4 degrees of each other and everything is running smooth, thanks for the advice




got rid of some ugly while i was in there too