1990 gmc jimmy suspension

[Jackass22]

looking for ideas on a 4 inch lift suspension. Flip shackles or not? Rubber bushings or poly.

 

[83ChevyK5Blazer]

What is your intended use for your truck?

Avoid rough country leafs, they ride way to stiff.

Tuff country ez rides or bds make decent front springs.

Shackle flip is good for cheap flex and decent ride. You will have to adjust the pinion angle when your done.

 

[Wes Harden]

Welcome @Jackass22

many opinions will be offered. There are some considerations, like what size tire, use, and if you are ok with trimming fender wheel openings. on a K20 I run 4" shackle flip with 56" 1 ton spring and 6" shackles, probably little more than 4" in the rear, 4" tuff country hd in the front. Stock steer configuration. Rides very well in the rear the front can be a bit rattly, airing down the tires help a lot here.
I prefer the poly, and am using the ORD Kevlar bushings. Nothing wrong with rubber in good shape, it cushions better than poly.
If money is not an issue get the ord custom leaf springs for your truck at the ride height you want, Cadillac of springs

 

[Jackass22]

What is your intended use for your truck?

Avoid rough country leafs, they ride way to stiff.

Tuff country ez rides or bds make decent front springs.

Shackle flip is good for cheap flex and decent ride. You will have to adjust the pinion angle when your done.

Thanks. Just cruising With it. A little off road but more of a show truck

 

[Jackass22]

Welcome @Jackass22

many opinions will be offered. There are some considerations, like what size tire, use, and if you are ok with trimming fender wheel openings. on a K20 I run 4" shackle flip with 56" 1 ton spring and 6" shackles, probably little more than 4" in the rear, 4" tuff country hd in the front. Stock steer configuration. Rides very well in the rear the front can be a bit rattly, airing down the tires help a lot here.
I prefer the poly, and am using the ORD Kevlar bushings. Nothing wrong with rubber in good shape, it cushions better than poly.
If money is not an issue get the ord custom leaf springs for your truck at the ride height you want, Cadillac of springs

Thanks

 

[rampage]

Spring for some good shocks too like 5100 series Bilsteins.