Wagon rear springs/coils

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PBGBodyFan

G-Body Guru
Mar 3, 2009
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I'm planning on replacing the rear springs/shocks on my wagon soon in the first step (ok, easiest step compared to the front) in upgrading the suspension and getting the stance I prefer. I have had Eibachs pro-kit on hand waiting for this but reading up on it sounds like it might drop the rear too much for the wagon. This spring worked/works well on my Monte's dropping it right about 1" over stock, the wagon sits taller so I'd think if it's a further drop that might be fine, but I don't want it squatting or the rear lower than the front. Anyone use Eibachs in their wagon or what other spring(s) might achieve a good ride, firmer than stock, with a lower than stock stance? I guess since the springs are so easy to change I will just test it out, but thought I'd see what other people have had results with personally.

*edit - I've searched the forum with some info but nothing is clear cut, probably in part to the subject of height/stance is a personal choice.
 

454GrandPrix

Master Mechanic
Jul 27, 2016
429
818
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Lehi, Utah
Maybe this info will help?

When I did my big block/8.8 axle swap, I decided to chuck my original stock rear coils for new ones. Knowing my GP would now be a bit heavier than it used to be, I wanted springs which were a bit heavier and slightly taller. Looking at the infamous Moog coil spring parts listing, I selected p/n 5391 which are supposed to be stock wagon replacement springs; they are rated at 142 lb/in compared to either 118 or 121 lb/in for the stock springs. I bolted them in, along with a new pair of KYB Gas-A-Just stock replacement shocks.

Now the rear end is much firmer than it used to be. It also sits at least an inch higher than before, which doesn't bother me personally.

(This is an old photo, but it is the best side shot I have)
rzguLqi.jpg


I know you don't want to go any higher, but these springs shocked me with how firm they are. YMMV. HTH
 
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PBGBodyFan

G-Body Guru
Mar 3, 2009
792
1,220
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Wisconsin
I put in the Eibach’s tonight. Dropped the rear roughly 3.5”. So that idea is scrapped, stock springs back in. I did do a shock upgrade (Bilsteins over possibly original shocks) at the same time and it was night, so no pics, did snap some showing the wheel opening lip heights for reference.

Might look at F-41 equivalent Moog’s, should drop it but still have a decent rate. A 1-2” drop is the goal.
 

PBGBodyFan

G-Body Guru
Mar 3, 2009
792
1,220
93
Wisconsin
From searching on here, Moog 5413's might drop it 1-2". OPG seems to be the only one who makes wagon specific drop springs but $180 for a pair vs maybe Moogs at $60-70 have me focused on finding the Moog's that do the trick. And coilovers aren't an option, this suspension build is on a budget :).

Anyone else besides "abadwillys" use this spring on a wagon?
 

TURNA

Rocket Powered Basset Hound
Jul 24, 2009
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What about regular coupe springs.

Dont the loaded wagons like yours come with the heavy duty cargo springs?
 

PBGBodyFan

G-Body Guru
Mar 3, 2009
792
1,220
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Wisconsin
What about regular coupe springs.

Dont the loaded wagons like yours come with the heavy duty cargo springs?

I plan to test out some F-41 springs to see where it puts it. My wagon is pretty bare minimum option wise. 3.8, has AC and a couple minor light options otherwise. Some minor weight difference if one has rear speakers/power latch/cargo light/spoiler but wonder how many wagon rear spring rates there were from the factory, if any since they wouldn’t differ that much in the rear.
 

TURNA

Rocket Powered Basset Hound
Jul 24, 2009
10,941
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Socialist NY

RobM

Apprentice
Nov 2, 2016
63
66
18
Ozone Park Kid
I'm looking to raise the rear ride height 1" or 2" on my '87 buick regal limited. I just installed front and rear kyb excel-g, rear tire 255/60/15, front 225/60/15. I'd like to know if moog rear coil springs 5391 fit my car.
 

timo22

G-Body Guru
Sep 10, 2012
550
1,072
93
St. Louis,Mo
If you guys are looking to raise the rear and have a firmer ride,you might want to consider air bags. This way you can control the heights and firmness and still allow the shocks to operate. It is difficult to guess how much springs will vary the heights in different cars. When installed properly air bags are reliable and durable. I’ve had a set on my 65 Malibu for over 20 years.

timo22
 
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