I replaced the rear coil's with some new 99 tall coils about a month ago.

Now, I know some on here have claimed that when they did this job, that it took them an hour and was easy.

However, when I did it, I had to remove the panhard rod linkage (or whatever it is called) to get the diff to drop far enough...and that is with spring compressors.

then, when I went to put everything back together, I had a hell of a time getting all the panhard linkages to line up with their bolt holes again.
I actually had to lower the truck to ground...after spending hours trying to pry and pull everything back in line...chock the tires, and put it in gear and move back and forth to get everything to line up.

Yeah, I know...

Anyways, so take it for a drive and all is fine.

However, I have noticed since the install that the rear seems a little unsettled at highway speeds.

So, it isnt necessarily dangerous to drive, or anything like that, and I let it go.
Well, a few weeks later I put on the new ball joints up front, and after do my usual string alignment.

As I'm getting the front end alignment straight, I notice that the rear tires are slightly toed out
Bang, it hits me...cause toe out in the rear will cause a nervous rear end at higher speeds.

So, obviously, SOMEHOW installing the rear coil springs gave me toe out in the rear.
BUT, I know it is impossible to adjust toe in the rear? Dont I?
I think I do?

 

you need an adjustable panhard bar. thats why you had a hard time getting it back in place. since you lifted you need to extend everything else. should look into getting longer shocks

 

There really shouldn't be any need for an adjustable panhard with a lift to "stock '99 height." I don't know what's causing the wandering, but there is no toe adjustment on our rear axles. My guess is because maybe bolts didn't get torqued down properly, or rear sway bar (are you sure you disconnected the panhard, or was it the sway bar?) is somehow causing a problem. Many people run without the rear sway bar with no such effects. If you're unsettled, double check your lugs, and re-torque on everything you loosened at any point, so you don't have something catastrophic happen on the freeway. Personally, I was able to upgrade my rear coils by stepping down on the rear axle with the shock disconnected until I could cram the new spring in (without a spring compressor). When I helped my brother put in his 891's, we unbolted the rear sway bar and it was a nightmare to put back on - I don't ever recommend that. We ended up with a situation of two hours lining up those stupid bolts, similar to your story.
My suggestion is to jack up the rear, start pushing and pulling and banging with a rubber mallet until you find out what is loose. Panhard should not be an issue with '99 coils unless it's not installed properly. If you feel solid on the rear toe issue, get it to a shop so they can double check your work. It's theoretically impossible, so get another pair of eyes on it.
Hope this helps, and let us know what you find

 

great info, and I'm going to do just that.
Will have time on tuesday to check it out, and will update with whatever I find.
thx