Rear axle adjustment needed?

I noticed the right bump stop is not hitting where it should. (Leaf spring bolts are uniformally tightened.) I also have felt a rotational thing, kinda like a tire being “out of round”. That feels like it’s from the front though.
& from what I have seen on TW, I don’t think my driveshaft is angled properly. I thought how to measure that was on here somewhere. I see references to angles, however not what they should be.


Not sure what pics to get for the angles.

This is with the phone flush to the frame.

 

There is a little (like an 1/8") in the center pin to spring perch fitment. I try to pull the axle aft as much as possible before snugging the u bolts up to keep the axle as square as possible. However I don't think being a 1/8" out would make a difference to where your bump stop is hitting. What springs are you running?

Drive shaft angles- you only should have an issue with these if you change the ride height of the truck. I don't think you have, and your angles don't look bad. Measuring is a pita, and a huge can of worms.

 

Really old pic of mine (had to look through my cloud) but it looks like the bumpstop itself has some room to move and center it before tightening the u-bolts down.



That and the u bolts coming down through the bottom plate can be moved a bit before being tightened down.

Same for the new set when I replaced both the leaf pack and bumpstops.

 

ATS springs. They seem decent, although I did not care for the co itself....
I'll check the centering of the stop.
Odd? thing is when I have a heavy load, the truck "out'a round" rotational feel is gone. That's why I started poking around at the driveshaft.

 

I did find an angle thread on here.
Pinion angle is -4. Front propeller is -4. Isn't there something to wanting a neg 1-2 degrees dif?
The coilovers I installed did give an inch/inch & 1/2 lift. Just thought it worth mentioning.

 

You shouldn't need to worry until you're in the 2.5"+ range. I chased a vibration around for a LONG time, and threw many parts at the truck (including a new DS and new wheels and tires), it ended up being my rear brakes. The drums had gone out of round. As I rotated the wheel (while on jackstands) I could hear the shoes drag at vs not dragging. It's not likely your issue, but something easy to cross off the list.

 

Are there supposed to be two weights on both parts of a double cardan driveshaft/propellor? I thought I read that on TW somewhere & can't find the reference again. I only have one on the 1st part & there's a spot with some, what looks like foil tape? residue. Could just be what's left of an ancient sticker I guess.

 

The balance weights will not be uniform across every truck- The size/weight, location, and count will be determined by what it took to balance the shaft. If you think you're missing a balance weight, just pull the DS and take it to get balanced. It was suggested here before that a shop would balance the two piece drive shaft together as a single unit, but when I had mine balanced, I asked about it, and they separate them and balance them individually.