Do springs really wear out?
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Junior Member
Joined: Dec 2005
Posts: 22
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From: Boise,ID
Car: '85 Trans Am
Engine: 350 Crate Motor
Transmission: T-5
Axle/Gears: 3.27 posi
Do springs really wear out?
I was checking my shocks the other day when I noticed that I can move the front of my car a great deal more than the rear. Its like jumping on the back of your grandma's car and it drops 3 inches. Ok not that bad on mine but its a huge difference that surprised me. The rear of the car feels solid; I can hardly rock it around. Sure theres a lot more weight in front to make it do this but what do you guys think?
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
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Joined: Jul 1999
Posts: 17,268
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Do springs really wear out?
Springs hold the weight of the car. Shocks control how much the springs move.
Springs can wear out and even break. All springs have a spring rate. How much they'll compress when a specific amount of weight is applied to them. After countless oscillations over the life of a spring, the spring rate will decrease. Normally this is noticed as sagging or riding too low.
Some factory springs such in an RS model have a soft spring rate to give a soft ride. Springs in a Z28 have a high spring rate to give a more firmer, aggressive ride.
Providing the spring rate is not too high, you can do a bounce test to check the shocks. Pushing down on the car, it should bounce back up then down to it's rest position. If it continually bounces, the shocks/struts are worn out and are not controlling the spring oscillations.
Springs can wear out and even break. All springs have a spring rate. How much they'll compress when a specific amount of weight is applied to them. After countless oscillations over the life of a spring, the spring rate will decrease. Normally this is noticed as sagging or riding too low.
Some factory springs such in an RS model have a soft spring rate to give a soft ride. Springs in a Z28 have a high spring rate to give a more firmer, aggressive ride.
Providing the spring rate is not too high, you can do a bounce test to check the shocks. Pushing down on the car, it should bounce back up then down to it's rest position. If it continually bounces, the shocks/struts are worn out and are not controlling the spring oscillations.
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Joined: Jul 1999
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From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: Do springs really wear out?
What they said.....
Sounds more like a strut problem than a spring problem. Springs only or blown struts/shocks & the car can bounce up & down like a basketball (with the tires staying on the road, just the body bouncing).
Sounds more like a strut problem than a spring problem. Springs only or blown struts/shocks & the car can bounce up & down like a basketball (with the tires staying on the road, just the body bouncing).
Thread Starter
Junior Member
Joined: Dec 2005
Posts: 22
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From: Boise,ID
Car: '85 Trans Am
Engine: 350 Crate Motor
Transmission: T-5
Axle/Gears: 3.27 posi
Re: Do springs really wear out?
I replaced the shocks and struts about 30,000 miles ago and they still seem to be fine; like they say, you push it down and it comes up then down to rest. And like I said it isn't really that bad it just seems soft compared to what a performance car ought to feel like. Yeah these things are NEVER done.
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iTrader: (12)
Joined: Jul 1999
Posts: 12,212
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From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: Do springs really wear out?
What brand shocks/struts?
If the car only comes up & down once, then settles....That is pretty normal.
Worse I've seen was a car that either had BAD shocks, or none at all. Pulled up to a red light...bounce, bounce, bounce, bounce.....Until the traffic clears & he took a right on red turn. And it wasn't no lowrider!
If the car only comes up & down once, then settles....That is pretty normal.
Worse I've seen was a car that either had BAD shocks, or none at all. Pulled up to a red light...bounce, bounce, bounce, bounce.....Until the traffic clears & he took a right on red turn. And it wasn't no lowrider!
Thread Starter
Junior Member
Joined: Dec 2005
Posts: 22
Likes: 0
From: Boise,ID
Car: '85 Trans Am
Engine: 350 Crate Motor
Transmission: T-5
Axle/Gears: 3.27 posi
Re: Do springs really wear out?
Monroe Sense-a-trac. Shocks and struts were blown when I got the car, and that was one of the first things I fixed mechanically. Can't say how they compare to others but I'm very satisfied with them. No problems whatsoever.
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