I've got a 94 pickup 4in lift and I've noticed my rear axle is sticking out further on the passenger side than the drivers,I haven't four wheeled it or really hit any thing,I measured from the front of leaf spring to front of axle and its the same on both sides,it is lifted with blocks but the 3.0 doesn't have enough power to dislodge them,they're sitting where they should be,I attached some pics any ideas would be appreciated

 

How long have you had it? Any chance a previous owner whacked the rear end? I've seen misaligned rear ends 'dog leg' down the road, but to be off center like that in the garage says to me the springs or spring mounts are possibly tweaked.

 

Or the frame and a few other bits, like the shear pins that locate the springs or the blocks themselves have bend..


Anyways, so uh what do you recall about intro trigonometry? I think your about to put it into practice or relearn it in the real world here..

I'd probably start with checking the frame is still square. Measure from the FWD spring mount to the FWD bolt of the Cross member on the opposite side, then repeat for the other side. If these aren't equal the frame has racked.

 

I didn't have the luxury of attending a trigonometry class. But yes, the frame could also be bent. I was looking at the easiest solution first.

 

I dont believe its ever been wrecked,its got 340,000 on it and could use new bushings but,i'll measure to the cross member and see what it tells me

 

Trigonometry,,isnt that the practice of breathing control to keep crosshairs on target

 

I tried to pull measurement but fuel tank is in my way,I do know that from the rear spring mount to the back of rear axle tube is the same on both sides,I would think if it were tweaked it would show there

 

What I would do is to cross measure from corner to corner on the frame, find a point that is identical on the left and right side both in the front and in the back.
measure from left front to right rear and compare to right front measured to left rear.
You could also hang a plumb bob from the frame down to the rear leaf spring/axle on each side and see if the leaf springs are actually leaning to one side.
If one rear tire sits farther out than the other you need to see where the difference is. Somebody put a longer axle in one side? Slid into a curb in the winter and bent something?
your pictures make it hard to get the whole story here, keep in mind many vehicles have a narrower rear end than the front. I'd have to whip out the tape measure on your truck to tell since mine isn't stock anymore.
But I know for a fact that a stock chevy suburban fit on an old car trailer I had with the front tires so tight between the side rails I was tempted to grease them to get the truck on the trailer and the rear end had a tiny bit of room to spare.
the point I'm making is that I can't see how you set up the strings in your picture and I can't see the side of your truck, so measure with a plumb bob off the side of the rear wheel well on each side and you can more accurately see which tire/wheel sticks out more.

 

What I did was run a string from the front drivers side wheel around the back wheels and up to the front passenger wheel,i took and moved the string out until it was just barely touching the front sidewall of the rear wheels the drivers side touched ther sidewalls on the drivers side,they are aligned but the front tire on passenger side is about 1/2 in off,heres my artists rendition,I will pull some measurements tomorrow

 

Are you assuming that the two corners are exactly 90*? this isn't a good way to determine much of anything.
you aren't taking into account that the front end has "toe in"
you haven't attached any pictures that help in any way to see one wheel sticking out farther than another.
I think you need to go to an alignment shop and get some real measurements.

 

the body could be shifted to the left via poor or damaged mounts.

my cj-5 crabwalks down the road, with the back end slightly towards the right. the body is also slightly askew on the mounts, slightly to the right, which really looks pronounced from the back view when driving.