My 92:
Replaced blown bushings on my rear lift-shackles. Both sides were completely blown out.
Firm shifts (behind my V8) really banged bushings metal to metal.
I lifted my van with floor jack and block under trailer-hitch (no photo)
It's being held up (in this photo) by jack-stands further up (with rear-end hanging freely)
To pull shackles, I did not need to disconnect shocks
(you can flex springs up or down easily by hand to slide out bolts)
I suspect petroleum-based grease ate up the bushings, since they were only a few years old.
Poly-urethane manufacturers suggest to use ONLY silicone based grease.
For reference, bushings (on these lift shackles) are 1.5" OD x 3/4" ID (for sleeve)
Sleeve is 3/4" OD x 1/2" ID (x 3.5" long for Gen1 monoleaf)
I found replacement bushings by Energy Suspension #3.2124G for $18 Amazon (also available in red)
This bushing set will work for either Gen 1 or Gen 2 using this brand lift shackle
Product comes with 4 bushings, 2 sleeves (not used).. and silicone grease.
All cleaned up, lubed, and ready to go in.
I recommend (this time) do not use zerk fittings (pumped with petroleum based grease)...
but coat bushings with silicone grease by hand.
FUN NOTE: Due to weak worn springs... I run diver-side one hole higher than passenger side
(to compensate for weight and worn DS spring... to level the vehicle)
Each hole is good for 1/2" lift increment (since adjusting only rear side of spring)
Van now sits perfectly level (left to right)
Only hand tools needed for entire job: 13/16 wrench, 13/16 ratchet & socket, 7/8 wrench
Both sides done (job about 20 min per side max)
Took it for it's test drive next morning to local car show... rode great as always!
Happy again... LIFE IS GOOD!