Rear Coil Spring Measurement - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SCOTI · 10-07-2020, 04:13 PM

Does anyone have any used rear coil springs on hand that could measure the 'free' height?

**Boog** · 10-07-2020, 04:27 PM

I think so Scoti. I'll see here in a bit.
Scoti mine are the originals off my 69 short stepper 1/2 ton. They measure 13 1/2” free height.

SCOTI · 10-07-2020, 05:25 PM

Thank you for the dimensions.

SCOTI · 11-16-2020, 02:10 PM

Ok.... Revisiting this & I'm curious. I'd like to get additional dimensions from rear coil spring set-ups (just a few).

A measurement (bottom of the frame rail to top of the truck-arm as close to the coil as possible) from a truck as well as from a burb. Stock height is the desired priority but I won't turn down dimensions of a lowered combo if someone can easily get the info.

I have a non-stock 'research' agenda & some measurements from trucks assembled & on the road will help. My priority would be from Burb owners as they're heavier in the rear half of the chassis. The more info the better:

Measured from in front of spring or behind

Type of truck (short fleet/short step; long fleet; Burb; ETC)

Spring info (replacement coil; original coil; lowered coil)

Loaded/installed height

Thanks in advance!

**pjmoreland** · 11-16-2020, 04:03 PM

I have 5" drop springs from GMCPauls on my 68 2WD short stepside. The loaded/installed height is 8"

SCOTI · 11-16-2020, 04:22 PM

Quote:

Originally Posted by pjmoreland

I have 5" drop springs from GMCPauls on my 68 2WD short stepside. The loaded/installed height is 8"

This info will be a nice comparison & what I'm looking for so I'll add that to my notes. Thanks for measuring!

SCOTI · 11-19-2020, 03:45 PM

TTT... Keeping this on the front burner until I can get additional input.

SCOTI · 11-24-2020, 06:34 PM

Holiday is coming up....

Lots of folks might be off work & tinkering in the shop. Anyone that can take some measurements on the rear springs of their C10 or Burb would be appreciated.

Jim Boy · 11-24-2020, 07:07 PM

I did mine yesterday. 68 long fleet rear springs 12 1/2" high. They were original springs. The truck seems to be 1" higher with new ones. Doing the fronts when I get around to it, thinking of rebuilding it all. Have a good one eh.

SCOTI · 11-24-2020, 07:37 PM

Quote:

Originally Posted by Jim Boy

I did mine yesterday. 68 long fleet rear springs 12 1/2" high. They were original springs. The truck seems to be 1" higher with new ones. Doing the fronts when I get around to it, thinking of rebuilding it all. Have a good one eh.

Thanks!

MaximusD · 11-24-2020, 09:27 PM

I pulled mine off last week, they are 13 1/2 inches high, still original.. 1970 c10 short wheel base, hope it helps. Happy Thanksgiving all

SCOTI · 11-25-2020, 12:38 AM

Quote:

Originally Posted by MaximusD

I pulled mine off last week, they are 13 1/2 inches high, still original.. 1970 c10 short wheel base, hope it helps. Happy Thanksgiving all

Thanks!

SCOTI · 11-25-2020, 10:44 AM

Quote:

Originally Posted by SCOTI

Does anyone have any used rear coil springs on hand that could measure the 'free' height?

For those that just looked @ this initial post..... I'm requesting dimensions of installed springs as well.

It seems the standard free height is fairly consistent & not much different vs. a 'new' coil. Now to see how much variance as installed. Drop spring info is appreciated as well for those that have the opportunity to provide it.

Thanks.

SCOTI · 10-03-2023, 02:57 PM

Bumping this as changes loom closer & more data would be beneficial for direction.

Looking for additional rear coil spring heights on stock set-ups. Wanting to see if there's a fairly consistent avg height or if they're more random that not.

**nightmare** · 10-03-2023, 11:10 PM

The free height of my stock 72 burb rear springs are 12.5 inches. I don't know if they are compressed from time, and I didn't get any installed measurements (didn't see this post until today).

SCOTI · 10-04-2023, 09:20 AM

Quote:

Originally Posted by nightmare

The free height of my stock 72 burb rear springs are 12.5 inches. I don't know if they are compressed from time, and I didn't get any installed measurements (didn't see this post until today).

TY for the info.

Jim Boy · 10-04-2023, 07:54 PM

Got to thikin about it and there could be a difference in height depending whether the springs are regular or heavy duty. Just a thought cause I have too much time on my hands that allows me to think!! Have a good one eh!

SCOTI · 10-04-2023, 08:54 PM

Quote:

Originally Posted by Jim Boy

Got to thikin about it and there could be a difference in height depending whether the springs are regular or heavy duty. Just a thought cause I have too much time on my hands that allows me to think!! Have a good one eh!

Correct, there is a possible difference thus my trying to get as much data as I can.

10-07-2020, 04:13 PM	#1
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,037	Rear Coil Spring Measurement Does anyone have any used rear coil springs on hand that could measure the 'free' height? __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

10-07-2020, 04:27 PM	#2
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,459	Re: Rear Coil Spring Measurement I think so Scoti. I'll see here in a bit. Scoti mine are the originals off my 69 short stepper 1/2 ton. They measure 13 1/2” free height. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross Last edited by Boog; 10-07-2020 at 04:39 PM.

10-07-2020, 05:25 PM	#3
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,037	Re: Rear Coil Spring Measurement Thank you for the dimensions. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

11-16-2020, 02:10 PM	#4
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,037	Re: Rear Coil Spring Measurement Ok.... Revisiting this & I'm curious. I'd like to get additional dimensions from rear coil spring set-ups (just a few). A measurement (bottom of the frame rail to top of the truck-arm as close to the coil as possible) from a truck as well as from a burb. Stock height is the desired priority but I won't turn down dimensions of a lowered combo if someone can easily get the info. I have a non-stock 'research' agenda & some measurements from trucks assembled & on the road will help. My priority would be from Burb owners as they're heavier in the rear half of the chassis. The more info the better: Measured from in front of spring or behind Type of truck (short fleet/short step; long fleet; Burb; ETC) Spring info (replacement coil; original coil; lowered coil) Loaded/installed height Thanks in advance! __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

11-16-2020, 04:03 PM	#5
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,807	Re: Rear Coil Spring Measurement I have 5" drop springs from GMCPauls on my 68 2WD short stepside. The loaded/installed height is 8"

11-19-2020, 03:45 PM	#7
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,037	Re: Rear Coil Spring Measurement TTT... Keeping this on the front burner until I can get additional input. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

11-24-2020, 06:34 PM	#8
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,037	Re: Rear Coil Spring Measurement Holiday is coming up.... Lots of folks might be off work & tinkering in the shop. Anyone that can take some measurements on the rear springs of their C10 or Burb would be appreciated. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

11-24-2020, 07:07 PM	#9
Jim Boy Registered User Join Date: Nov 2017 Location: Wasaga Beach Ontario Canada Posts: 208	Re: Rear Coil Spring Measurement I did mine yesterday. 68 long fleet rear springs 12 1/2" high. They were original springs. The truck seems to be 1" higher with new ones. Doing the fronts when I get around to it, thinking of rebuilding it all. Have a good one eh.

11-24-2020, 09:27 PM	#11
MaximusD Registered User Join Date: Oct 2017 Location: Billings Mt Posts: 53	Re: Rear Coil Spring Measurement I pulled mine off last week, they are 13 1/2 inches high, still original.. 1970 c10 short wheel base, hope it helps. Happy Thanksgiving all

10-03-2023, 02:57 PM	#14
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,037	Re: Rear Coil Spring Measurement Bumping this as changes loom closer & more data would be beneficial for direction. Looking for additional rear coil spring heights on stock set-ups. Wanting to see if there's a fairly consistent avg height or if they're more random that not. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

10-04-2023, 07:54 PM	#17
Jim Boy Registered User Join Date: Nov 2017 Location: Wasaga Beach Ontario Canada Posts: 208	Re: Rear Coil Spring Measurement Got to thikin about it and there could be a difference in height depending whether the springs are regular or heavy duty. Just a thought cause I have too much time on my hands that allows me to think!! Have a good one eh!



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