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Old 06-12-2008, 06:34 AM   #1
caminokid
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Is this right?

I was looking at the rear springs on the stepper...and I noticed that 3 of the coils looks like they are collapsed. Is this they way its supposed to be?

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Old 06-12-2008, 07:01 AM   #2
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Re: Is this right?

No.They were probably heated to lower or settled that way.The center wraps are closer than the outer when new.
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Old 06-12-2008, 07:08 AM   #3
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Re: Is this right?

Thats what I thought. I noticed on my fleet with overloads that the springs sat up higher. So I might take the springs off the trailer and use them.
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Old 06-12-2008, 01:07 PM   #4
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Re: Is this right?

I agree with special-k, those were heated.
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Old 06-12-2008, 08:40 PM   #5
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Re: Is this right?

3/4 springs?
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Old 06-12-2008, 10:29 PM   #6
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Re: Is this right?

they are supposed to be like that.
Variable rate springs. You get the ride quality (soft ride) from the center 3 rings, once you put a load on there, they stack up, and then the rest of the spring takes over, with a higher spring rate.
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Old 06-12-2008, 10:36 PM   #7
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Re: Is this right?

"Variable rate springs" so that's what they're called. Thx Andy, learning something almost everyday here.
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Old 06-12-2008, 11:23 PM   #8
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Re: Is this right?

no problem Al.
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Old 06-12-2008, 11:55 PM   #9
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Re: Is this right?

thats how mine are i just figured mine for wore out guess not i was going to replace all mine to thanks now i know
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Old 06-13-2008, 02:00 AM   #10
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Re: Is this right?

Quote:
Originally Posted by Longhorn Man View Post
they are supposed to be like that.
Variable rate springs. You get the ride quality (soft ride) from the center 3 rings, once you put a load on there, they stack up, and then the rest of the spring takes over, with a higher spring rate.
Not sure how you can get good ride quality from springs that are touching each other. Please explain. Are you saying that they shouldn't be touching.. but they will under heavy load?
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Old 06-13-2008, 02:12 AM   #11
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Re: Is this right?

Quote:
Originally Posted by Longhorn Man View Post
they are supposed to be like that.
Variable rate springs. You get the ride quality (soft ride) from the center 3 rings, once you put a load on there, they stack up, and then the rest of the spring takes over, with a higher spring rate.

I could be wrong, but I don't believe those are progressive (or variable) rate springs. On a progressive rate spring, the closer coils are always on the top, from my experience. They also won't completely compress during static loading, i.e. with the truck just sitting there. I would bet those were heated to lower the truck.
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Old 06-13-2008, 08:32 AM   #12
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Re: Is this right?

Quote:
Originally Posted by mahanian View Post
I could be wrong, but I don't believe those are progressive (or variable) rate springs. On a progressive rate spring, the closer coils are always on the top, from my experience. They also won't completely compress during static loading, i.e. with the truck just sitting there. I would bet those were heated to lower the truck.
Every truck that I have seen with "H.D. Rear Springs" on the SPID, has those type springs installed.
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Old 06-13-2008, 09:56 AM   #13
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Re: Is this right?

I wish the SPID was still on mine. I looked at the other springs I have and they are the same. One thing I can....Andy has never been wrong!
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Old 06-13-2008, 09:59 AM   #14
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Re: Is this right?

Quote:
One thing I can....Andy has never been wrong!


I can't wait to see his response to that^^^
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Old 06-13-2008, 01:27 PM   #15
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Re: Is this right?

Quote:
Originally Posted by LONGHAIR View Post


I can't wait to see his response to that^^^

Andy thought he was wrong ONCE,, but he was mistaken....
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Old 06-13-2008, 02:23 PM   #16
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Re: Is this right?

Im pretty sure the ones on mine look like that and I know gramdpa didnt lower his truck.(unless loading it counts)
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Old 06-13-2008, 02:31 PM   #17
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Re: Is this right?

When I put new drop coils in my truck the old ones looked just like those. Before I pulled them my truck was at stock ride height. I asked an old chevy dealer mechanic and he said the same thing Andy did. It looks wierd but that is the way they came, not because they were heated.
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Old 06-13-2008, 06:34 PM   #18
Longhorn Man
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Re: Is this right?

I've been wrong PLENTY of times.
HD optioon springs were not progressive as far as I know, but I have never owned HD coils.
I do know the rear springs on my old GMC were stock replacement for a base model 1/2 ton, bought in the 80's (from the dealer) and installed in the early 90's, and were exactly like that, as were just about every coil spring I have ever looked at on these trucks.
The 3 center rings are not supposed to be touching, but only 1/8 inch or so apart. Once they are all 3 stacked up and solid, then you are riding on the rest of the spring. Those are stock style... if not original 40 year old springs. They may have sagged a little and be almost stacked up at the rest position. But, that IS pertty much what they are supposed to look like.
If they were heated, you would see evedence to the fact too. Either burn marks if recent, or very bad rust in the burn spots if not so recent.
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Old 06-16-2008, 11:43 PM   #19
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Re: Is this right?

Another thing I just noticed today while under the burb... my 72 C/20 suburban has the coils like that, and it sites higher oin back than my C/30 longhorn.
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Old 06-17-2008, 01:28 AM   #20
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Re: Is this right?

1969 C-10

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