Wagon Rear Springs - Chevy Impala SS Forum
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post #1 of 32 (permalink) Old 06-01-2016, 02:19 PM Thread Starter
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Wagon Rear Springs

Have installed Tahoe Rear Springs to the SSuperWagon.
They are too stiff over the stock ones.
Great for loading 1200 lbs of Soil from Home Depot.

What is a good spring in between these and the Stock ones?
Already have airbags and airbag pump.


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post #2 of 32 (permalink) Old 06-01-2016, 09:23 PM
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What year tahoe spring is it? Any idea of the spring rate?
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post #3 of 32 (permalink) Old 06-02-2016, 09:35 AM
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Either SS springs or 9c1 springs will do. Im gonna say SS springs will soften it up but carry any added weight without issues.

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post #4 of 32 (permalink) Old 06-02-2016, 10:40 AM
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Both ss and 9c1 springs are softer than wagon springs at 154lbs/in vs 211lbs/in.
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post #5 of 32 (permalink) Old 06-02-2016, 10:58 AM Thread Starter
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Quote:
Originally Posted by 91ss View Post
Both ss and 9c1 springs are softer than wagon springs at 154lbs/in vs 211lbs/in.
YES that is why they were not used.


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post #6 of 32 (permalink) Old 06-02-2016, 12:11 PM
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I used Moog cc623's.
Height is just over over stock 21.9" mine are sitting ~22.375" currently.

Variable rate good ride IMHO.
Load rating ~865lbs, spring rate listed as 209lbs, but doesn't give variable rate?
More Information for MOOG CC623
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post #7 of 32 (permalink) Old 06-02-2016, 08:00 PM
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I'm running the CC's too but the 625s instead - they do nicely. I can't recall off hand how they are different from the 623s, but they've been doing well for me for a few years now.

Longroofs in the Driveway-- 1993 RMW:
SS Rims, Billsteins, CC625s, airlift 1000s, tow-pac radiator

with a little company:
'88 R20 Suburban & a '16 HRV
Gone: '96 Black SS & '95 RMW
Location--way down south
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post #8 of 32 (permalink) Old 06-03-2016, 12:21 AM
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Here some spring choices vs the stock 4 wagon springs factoring a wagon has 100 more pounds over the rear as was pointed out in another thread:

Spring # Inside Dia Bar Dia height for 935 (770 sprung) load Spring Rate (Lbs/in.) Free Height Type Comments
TRS 11.7 211 15.59 Pigtail Ends Wagon
TRR 11.3 211 15.20 Pigtail Ends Wagon
TRP 10.9 211 14.80 Pigtail Ends Wagon
TRN 10.6 211 14.45 Pigtail Ends Wagon

5709 5.53 0.656 10.7 239 14.18 Pigtail Ends
8305 5.66 0.672 11.1 230 14.63 Pigtail Ends
8389 5.66 0.672 11.8 229 15.38 Pigtail Ends
8533 5.65 0.7 11.3 263 14.39 Pigtail Ends
8535 5.65 0.703 11.8 259 14.99 Pigtail Ends

Last edited by 91ss; 06-03-2016 at 12:23 AM.
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post #9 of 32 (permalink) Old 06-03-2016, 10:37 AM Thread Starter
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PIcture of what I am Towing

Here is what I am towing.
To help get a better idea what is needed.

Have Airbag and Pump System.
Replaced Stock springs with Tahoe.
Works well but unloaded very bouncy.

Have Metco Lower with SS Roll Bar.
Would like loaded ride height to be 1 -2 inches lower.


D
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post #10 of 32 (permalink) Old 06-03-2016, 10:59 AM
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Still can't find rates of the tahoes. But if it's bouncy unloaded, sounds like you don't have enough shock.

Somewhere I dug up some part numbers that should work well with a 750 front and like the 239lbs rears. Was from a dodge truck application that uses those springs. Got that info at work.

You may want to try the tahoe shocks. But would need to modify the ends. Think you could just press out the top sleeve and press in a stock type T bolt from an old set. Bottoms may work just without the sleave.
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