Coil Spring / Helper Spring Trailng Arms - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**NewBayColony** · 01-04-2020, 12:03 PM

Are the trailing arms different on the trucks equipped with the optional helper springs or is it a bolt on piece that helper springs hit on the trailing arms? Thanks.

Redneck Rydes · 01-04-2020, 12:09 PM

Trailing arma are the same,just a bolt on pad under the rear end pads held on with the U bolts

**NewBayColony** · 01-04-2020, 12:15 PM

Quote:

Originally Posted by Redneck Rydes

Trailing arma are the same,just a bolt on pad under the rear end pads held on with the U bolts

Thanks.Now I have to find them. Are they different for 1/2 3/4? Different years?

**LockDoc** · 01-04-2020, 01:12 PM

-
Here is a picture that shows all of the parts for one side. This frame is either a SB frame or someone has cut the frame rails off. I'm betting they would be expensive to ship, they are heavy.

LockDoc

**NewBayColony** · 01-04-2020, 02:20 PM

I have all the parts except for the pad on the end of the trailing arm. When I bought them, I didn't know about the pads.
Do you know if the pads are different on a 1/2 or 3/4 and are they specific year? Thanks for the picture, Leon.

**FirstOwner69** · 01-04-2020, 02:22 PM

Quote:

Originally Posted by NewBayColony

Thanks.Now I have to find them. Are they different for 1/2 3/4? Different years?

Good question. Those in the picture Leon posted are different from those on my '69 3/4 ton in that mine are only a single leaf vs. what appears to be 3 in Leon's picture.

**NewBayColony** · 01-04-2020, 02:30 PM

Quote:

Originally Posted by FirstOwner69

Good question. Those in the picture Leon posted are different from those on my '69 3/4 ton in that mine are only a single leaf vs. what appears to be 3 in Leon's picture.

The pair I have are single leaf, too.Thanks for the picture as mine is a 3/4 also.

**burb71** · 01-04-2020, 03:39 PM

I don't have the picture at hand now I think it's in the assembly manual, it shows the multi leaf auxiliary spring and it's stamped discontinued, replaced by the single leaf auxiliary spring.
I've had the auxiliary spring units on both my half tons and 3/4 ton trucks and they are the same.
There is a New Old stock single leaf auxiliary spring unit on eBay right now for $400

**NewBayColony** · 01-04-2020, 04:37 PM

Thanks!!

SD69C10 · 10-01-2020, 11:54 AM

I was trying to figure out why i had leaf springs and a coil in the rear of my truck and realized it was a "helper" spring. It looks like the pictures from others in this thread are mounted to the side of the frame...mine are mounted directly below the frame. Is this common for some setups?

**kwmech** · 10-01-2020, 12:01 PM

Quote:

Originally Posted by SD69C10

I was trying to figure out why i had leaf springs and a coil in the rear of my truck and realized it was a "helper" spring. It looks like the pictures from others in this thread are mounted to the side of the frame...mine are mounted directly below the frame. Is this common for some setups?

Never seen that one before

**LockDoc** · 10-01-2020, 12:03 PM

Quote:

Originally Posted by SD69C10

I was trying to figure out why i had leaf springs and a coil in the rear of my truck and realized it was a "helper" spring. It looks like the pictures from others in this thread are mounted to the side of the frame...mine are mounted directly below the frame. Is this common for some setups?

That looks more like an aftermarket setup, like what JC Whitney or one of those companies sold.

LockDoc

cj847 · 10-01-2020, 03:05 PM

This seems easier if you don't already have the leaf type helpers.

Name: spring.jpg
Views: 393
Size: 73.9 KB

notsolo · 10-01-2020, 03:42 PM

If the Trailing arm is the same is there a metal plate that fits under the axle with that bumper attached?

68Gold/white · 10-01-2020, 03:44 PM

Quote:

Originally Posted by notsolo

If the Trailing arm is the same is there a metal plate that fits under the axle with that bumper attached?

Yes! New rubber bumpers are available from LMC.

68Gold/white · 10-01-2020, 03:50 PM

My Dad had a 68 C10, it had the multi leaf helper spring setup on it. I had a 68 C-10 that may have have a helper spring added on to it. It looked just like the factory, EXCEPT the forward end of the spring contacted the top of the axle tube,instead of the plate/cushion, like posted here...

**kwmech** · 10-01-2020, 05:55 PM

Quote:

Originally Posted by cj847

This seems easier if you don't already have the leaf type helpers.

Attachment 2052293

The only issue with that is: shock mounts are not designed to support vehicle weight

stomper · 10-01-2020, 06:53 PM

Quote:

Originally Posted by SD69C10

I was trying to figure out why i had leaf springs and a coil in the rear of my truck and realized it was a "helper" spring. It looks like the pictures from others in this thread are mounted to the side of the frame...mine are mounted directly below the frame. Is this common for some setups?

I just cut some of those off a chassis I have and threw them away.

01-04-2020, 12:03 PM	#1
NewBayColony Senior Member Join Date: Mar 2017 Location: Northbridge,MA Posts: 494	Coil Spring / Helper Spring Trailng Arms Are the trailing arms different on the trucks equipped with the optional helper springs or is it a bolt on piece that helper springs hit on the trailing arms? Thanks. __________________ 72 C20 292 3OTT 77 GMC 2500 4x4 Longstepper 350 4sp 50 3100 ex Airforce/Town of Mendon fire truck 72 GMC 1500 2wd short stepside 250 4sp 78 GMC 2500 4x Longstepper 292 4sp 54 6400 Chevy 5 window 4 sp 2sp vac rear end Shell oil truck/dump truck (Norman)

01-04-2020, 12:09 PM	#2
Redneck Rydes Registered User Join Date: Feb 2016 Location: Trenton,Ontario & South Carolina Posts: 755	Re: Coil Spring / Helper Spring Trailng Arms Trailing arma are the same,just a bolt on pad under the rear end pads held on with the U bolts

01-04-2020, 01:12 PM	#4
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,405	Re: Coil Spring / Helper Spring Trailng Arms - Here is a picture that shows all of the parts for one side. This frame is either a SB frame or someone has cut the frame rails off. I'm betting they would be expensive to ship, they are heavy. LockDoc Attached Images __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

01-04-2020, 02:20 PM	#5
NewBayColony Senior Member Join Date: Mar 2017 Location: Northbridge,MA Posts: 494	Re: Coil Spring / Helper Spring Trailng Arms I have all the parts except for the pad on the end of the trailing arm. When I bought them, I didn't know about the pads. Do you know if the pads are different on a 1/2 or 3/4 and are they specific year? Thanks for the picture, Leon. __________________ 72 C20 292 3OTT 77 GMC 2500 4x4 Longstepper 350 4sp 50 3100 ex Airforce/Town of Mendon fire truck 72 GMC 1500 2wd short stepside 250 4sp 78 GMC 2500 4x Longstepper 292 4sp 54 6400 Chevy 5 window 4 sp 2sp vac rear end Shell oil truck/dump truck (Norman)

01-04-2020, 03:39 PM	#8
burb71 Active Member Join Date: Oct 2002 Location: Ft. Myers, Fl Posts: 1,716	Re: Coil Spring / Helper Spring Trailng Arms I don't have the picture at hand now I think it's in the assembly manual, it shows the multi leaf auxiliary spring and it's stamped discontinued, replaced by the single leaf auxiliary spring. I've had the auxiliary spring units on both my half tons and 3/4 ton trucks and they are the same. There is a New Old stock single leaf auxiliary spring unit on eBay right now for $400

01-04-2020, 04:37 PM	#9
NewBayColony Senior Member Join Date: Mar 2017 Location: Northbridge,MA Posts: 494	Re: Coil Spring / Helper Spring Trailng Arms Thanks!! __________________ 72 C20 292 3OTT 77 GMC 2500 4x4 Longstepper 350 4sp 50 3100 ex Airforce/Town of Mendon fire truck 72 GMC 1500 2wd short stepside 250 4sp 78 GMC 2500 4x Longstepper 292 4sp 54 6400 Chevy 5 window 4 sp 2sp vac rear end Shell oil truck/dump truck (Norman)

10-01-2020, 11:54 AM	#10
SD69C10 Registered User Join Date: Aug 2020 Location: San Diego, CA Posts: 76	Re: Coil Spring / Helper Spring Trailng Arms I was trying to figure out why i had leaf springs and a coil in the rear of my truck and realized it was a "helper" spring. It looks like the pictures from others in this thread are mounted to the side of the frame...mine are mounted directly below the frame. Is this common for some setups? Attached Images __________________ 1966 Ford Mustang 1969 Chevy C10 1971 Chevy C20

10-01-2020, 03:05 PM	#13
cj847 Registered User Join Date: Sep 2016 Location: Ft Smith, AR Posts: 559	Re: Coil Spring / Helper Spring Trailng Arms This seems easier if you don't already have the leaf type helpers.

10-01-2020, 03:42 PM	#14
notsolo Registered User Join Date: Apr 2008 Location: Md Posts: 2,461	Re: Coil Spring / Helper Spring Trailng Arms If the Trailing arm is the same is there a metal plate that fits under the axle with that bumper attached? __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=635605

10-01-2020, 03:50 PM	#16
68Gold/white Registered User Join Date: Sep 2011 Location: Ark City, Kansas Posts: 3,324	Re: Coil Spring / Helper Spring Trailng Arms My Dad had a 68 C10, it had the multi leaf helper spring setup on it. I had a 68 C-10 that may have have a helper spring added on to it. It looked just like the factory, EXCEPT the forward end of the spring contacted the top of the axle tube,instead of the plate/cushion, like posted here...



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.