Rear end jumping going over a big bump

[aliveguy5]

My Trailboss used to act just like all others described until I switched to Bilsteins. In my opinion I'd change the front and rears (some only change the rear) and as another member said on this string you will think you purchased a better truck! The dampening on the Bilsteins is night and day and I was actually shocked how much tighter the truck feels. 

[Brocko103]

I agree it looks like a 2" lift. Can't see from the picture if it's the GM kit or the poor man's trail boss (2" spacers up front and 2" rear blocks). Look between your rear axle and the leaf springs. There's no block from the factory, so if you have a 2" block, you have a 2" rear lift. Same up front, if there's a spacer above or below the strut, it's lifted (about 1.3" spacer = 2" of lift). That would be a poor man's trail boss. The real GM kit uses longer front struts without spacers, but it will have rear blocks.

 

I gave my Z71 truck the poor man's trail boss treatment, and it would hop all over going over bumps or even just train tracks in town I had to be careful to keep the ass end of the truck in my lane. That problem completely disappeared when I installed a BDS lift with Fox shocks. The tires stay planted on the ground at all times now.

[cajunduck1]

It appears to be the poor man's Trail Boss. I out on some 5100s on the rear and that was definitely the cure. Those Ranchos didn't even try and extend out when I took them off. I'll go with the 5100s up front.  May remove the spacer and use the strut for that portion. What strut does the regular TB use?

[RSVolcom]

Had the hard slam as well over s bumps.  Have 10 of them in my housing track before I get home.  Hated it, always go slow as well and still slammed.  Sounded like my gate was down.   Bilstein's ended that the day they were put on.