how do i find my spring rate without looking on the coils?

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08 Ford Ranger 2.3l

"quick question" is not a helpful thread title, you should know this, post edited.

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2006 Ford Ranger Sport 4.0 2WD on 32x11.50R15s
-3" Doetsch Spindle Lift


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Open driver side door, look at door jamb sticker under the SPR code. It'll either be a 2 digit code or a 4 digit code like this: 11CC 1C. They bounce back and forth like that the past few years. First set/or 1 digit is front spring rate. Second set/or 1 digit is rear spring rate. What that digit means as far as weight numbers? No clue...havnt found much in the line of actually what the spring rates are.

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'01 XLT disguised as a '03 Fx4 Level II.

i know i know. Long night didnt get much sleep. but as far as spring rate goes ima check the door jam. Because i might be looking into lift springs only like an inch or two. Should i just call eibach and tell them my truck and see what my spring rate is?

also would i need a new control arm?

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08 Ford Ranger 2.3l

thanks for the help fx4. if i went up like 50 pounds or more how much stiffer you think the ride would be?

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08 Ford Ranger 2.3l