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!

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.