Sagging right rear

Sagging right rear

Postby Rod's Trucks [OP] » November 9th 2020, 4:16am

I've been suspecting a Rt rear spring was weak, because each time I think of it, and look at wheel well height, it seems lower.
Today, I was on hard level pavement and measured 32 inches at the left front and 31.75 a the Rt front ( top of wheel well arch). At the rear, I measured 30.75 at the Rt rear and 32.75 at the Lt rear.
I guess I need to crawl under it and see where the springs sit with respect to the frame.
I did the 2" body lift using 2" pucks and JOR shackles, but for some reason I never measured the ride height when I was done.
103134
103132
103130

Rod J
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Re: Sagging right rear

Postby Mmusicman » November 10th 2020, 12:29am

Only REAL solution I see is NEW springs.
Just too far off.

My 92 was sagging left-rear, only 1/2" off (after NEW front coils) .. I corrected rear with adjustable lift shackles.. one bolt hole higher on the typically sagged driver-side. Perfect rake on lowest setting, rear sits even and EXACTLY where I want it now. Simple inexpensive solution worked perfectly for me. :D
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Re: Sagging right rear

Postby AstroWill » November 10th 2020, 3:56am

Mmusicman wrote:Only REAL solution I see is NEW springs.
Just too far off.

x2

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Re: Sagging right rear

Postby MechBob » November 10th 2020, 4:39am

Used "heavy duty,or high weight" springs usually do not like "change".in the 60's-70's,I saw so many suspensions collapse from adding shackles.This also applies to torsion bars,they are springs.However,springs in astros are a bit better,but perhaps not as good as aftermarket,have seen lots of sagged out astros,when i was still at the dealership.Springs also take a "set".They find a position they are "happy" at,depending on how they were made.Lots of times,this "set" is minor,like musicmans,and a simple adjustment will work for many years.But,if your springs are "tired",you probably need new ones,as said before.You can raise that side in the shackle,and see what happens,but that much difference,i bet it collapses very soon.Sorry.
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Re: Sagging right rear

Postby Rod's Trucks [OP] » November 10th 2020, 5:54am

Thanks all,
I have also decided new springs are about next on the dwindling list of updates..at least the list is dwindling :shhh:
There is a leaf spring shop withing 30 miles of me.
I think I will go by there with the van, and see what they have to say.
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Re: Sagging right rear

Postby MechBob » November 10th 2020, 7:45am

12Just to give you a "heads up".most years of astro rear springs are "clamped " with strange spring brackets.To install springs with extra leafs,you have to use u bolts and different brackets,all this will cost you extra.But is generally worth the price.
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