Spring rates on Toyota 4 link

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dose

Junior Member
Jan 4, 2018
325
606
93
Mammoth Lakes CA
I'm thinking of changing my rear springs because my truck is extremely sensitive to adding weight in the rear.
The ride height is good when the bed is empty, but add a full cooler and some gear it can sag as much as 6".
Its is probably too soft also because I feel it blows through the travel too easy.


Setup is:

14" C/O. 14" 250 over 14" 400 springs with 2"preload
strapped at 22" wheel travel, 11-12" of bump travel
22 gal cell behind cab
35" spare behind axle

Would it be better to up the 250 to a 300 or to swap the 400 to a 450/500?
 

dose

Junior Member
Jan 4, 2018
325
606
93
Mammoth Lakes CA
3" ID on 2.5 shocks.
I know this sounds dumb but not really interested in weighing my truck or doing spring-rate calculators or motion ratios, I just want to throw money and my not so free time a it. LOL
 
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84prerunner

2:AM Fabrication
Feb 7, 2008
21,697
244
63
Covina CA
Linked trucks are always sensitive to weight change. Only real way to fix that portion of the issue is to run a triple rate setup with a tender coil and much heavier bottom coils. That setup sucks dick in the tuning department, but it’ll carry weight well.
Just got shots and giggles, I run 150 over 250 coils on my Yota.
 

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