What is this spring for? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70c10 · 11-21-2004, 09:08 PM

I pulled my wheels this weekend to detail my frame and suspension and noticed all of my drums had this spring except one. What is the purpose of this spring?. Is it a noise suppressor or something?

grayw0lf · 11-21-2004, 09:11 PM

I am curious to see myself!?.

chevydog66 · 11-21-2004, 09:14 PM

Is it welded on there? How is it attached? I've never seen such a thing.

RANDY COX · 11-21-2004, 09:17 PM

HHMm transfer heat and possibly noise.???????

CPNEJR · 11-21-2004, 09:17 PM

actually thats exactly what it is it keeps pressure on the drum so it doesn't rattle

chevydog66 it's not welded on

LUV2XCLR8 · 11-21-2004, 09:17 PM

Someone Will Correct Me If I'm Wrong, I Used To Work At A Muffler
And Brake Shop For Extra Cash In The Afternoons, I Was Told By My
Buddy, The Manager, That It's Like Wheel Weights For Drums, Helps
Them Stay True Under Excesive Heat, My Old 70 Has/had Them On It.

3 on the tree · 11-21-2004, 09:18 PM

Old tech. That spring is to absorb harmonics (noise). Haven't seen one in years except old GM trucks.

LUV2XCLR8 · 11-21-2004, 09:18 PM

Quote:

Originally Posted by chevydog66

Is it welded on there? How is it attached? I've never seen such a thing.

NOT WELDED, JUST STRETCH EM ON, THERE IS A GROOVE THEY RIDE IN.

70c10 · 11-21-2004, 09:22 PM

Yes they ride in a groove and are just rolled on. I figured they were to suppress noise. Can I still buy one to complete my set?. I asked the parts guy today and he had no clue. I couldn't find any info in the service manuals.

Longhorn Man · 11-21-2004, 10:45 PM

I think I have one burried some place...I'm making a note to look for it.

glock35ipsc · 11-21-2004, 11:29 PM

Back when I was wrenching, we use to have leather straps that we wrapped around drums when we were turing them to keep them from "singing". Had thin ones for rotors too. Don't know if they are still doing that or not.

Tx Firefighter · 11-21-2004, 11:44 PM

Quote:

Originally Posted by glock35ipsc

Back when I was wrenching, we use to have leather straps that we wrapped around drums when we were turing them to keep them from "singing". Had thin ones for rotors too. Don't know if they are still doing that or not.

You bet they still do that, a rotor or drum will still sing without the strap when turning it on a lathe. Every lathe I've ever used had a selection of the straps there next to it.

70c10 · 11-21-2004, 11:55 PM

Should I get another spring and wrap it around the drum or does it matter that I have one missing?

Tx Firefighter · 11-21-2004, 11:56 PM

you'll never know it's gone.

70c10 · 11-22-2004, 12:32 AM

ok ,thanks for all the replies.

GlennBrittain · 11-22-2004, 12:42 AM

I deep sixed the springs on the 69 C10 SWB, I an drivining, never noticed any diferrance. Balance did not suffer without them. They must have been another nichol and dime item so GM could mark cost.

Arctic Gearhead · 11-22-2004, 01:36 AM

True enough!

Longhorn Man · 11-22-2004, 06:24 AM

None of you noticed your drums ringing at highway speed?
I noticed it on mine, they ring, like the dork at the fancy resaraunt running his finger around the rim of the wine glass.
What totally ticked me off was when I bought 2 brand new drums, no provisions for the springs.

68LSS1 · 11-22-2004, 10:08 AM

Yes, what Longhorn Man said. They are to stop the harmonics that cause a noise not vibration.

70c10 · 11-22-2004, 12:21 PM

Well, maybe I'll just put one on to complete the set if I can find one.

LT4XTREME · 11-22-2004, 12:23 PM

Last summer at a car show at the local auto tech center a friend of mine with a sweet black 66 c10 short fleet side was on the chassis dyno when a loud hissing noise started. At first they thought a air line on the dyno blew but when the truck was pulled off this grinding sound was coming from the driverside rear axle. We put the truck in another bay and pulled the wheel and drum and could not see anything wrong. So we put it back together and went to pull it out and it would not budge locked up solid. John the owner had to go out of town for a few days so he left the truck in the shop thinking the new locker and ring & pinion was messed up. Later that week when he got back to check it out again he found that the spring on the drum had expanded due to centrifugal force from running 100mph on the dyno and the spring jumped the groove into the space between the drum and the backing plate. So if you really want to know what the spring is for it's good for a weeks worth of headaches and worry.

Super Duck · 11-22-2004, 05:24 PM

backing plates off a later truck will bolt on and give you no problem wit hsprins, noise, and give you bigger brakes. kinda cool

Longhorn Man · 11-22-2004, 06:55 PM

They flew off at 100MPH?
Something was wrong with them, rusty or streatched.
I had my old GMC well over 100 MPH...the needle was pointing to the M in MPH. I held it there for a good 10 min, then I decided to back down. Held it at 100 for at least 1/2 hr.
There has been many, many times I have held it at 100 MPH. Never threw a spring.

Longhorn Man · 11-22-2004, 11:08 PM

It took 30 min of digging through my junk...but I found one.
$10 to your door shipped via USPS.
Interested? PM me if so.
There is another one too if anyone else is interested.

70c10 · 11-23-2004, 12:09 AM

Andy, PM sent.

11-21-2004, 09:08 PM	#1
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	What is this spring for? I pulled my wheels this weekend to detail my frame and suspension and noticed all of my drums had this spring except one. What is the purpose of this spring?. Is it a noise suppressor or something? Attached Images __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

11-21-2004, 09:11 PM	#2
grayw0lf Registered User Join Date: Apr 2004 Location: Clanton, AL Posts: 1,253	I am curious to see myself!?. __________________ 85' CUCV M1009!!! The newest addition! 6.2diesel, Th400, NP208, & only 36k miles! 70' C-10 LWB Fleetside - Looking good these days! 05' Dodge Neon 88' Winner Escape Sport 1750 - 4.3v6 94' Seadoo SP 84' Honda TRX200, bare nekkid. Just a frame & tires. Always looking for another project or any good deal!

11-21-2004, 09:14 PM	#3
chevydog66 GM ONLY BABY!!! Join Date: Oct 2003 Location: Fort Wayne, IN. Posts: 1,998	Is it welded on there? How is it attached? I've never seen such a thing. __________________ 2 wrongs don't make a right, but 3 lefts do. 66 Chevelle Malibu 406ci, 573hp, 10.99@121mph 96 Chevy Silverado Z71 72 GMC 1500 Super Custom LS 6.0/4L65 on airride http://www.cardomain.com/ride/707879...mc-c-k-pick-up

11-21-2004, 09:17 PM	#4
RANDY COX Registered User Join Date: Mar 2001 Location: RADFORD, VA Posts: 2,651	HHMm transfer heat and possibly noise.??????? __________________ 1964 BBC 402 4x4

11-21-2004, 09:17 PM	#5
CPNEJR Registered User Join Date: Sep 2003 Location: Franconia,N.H. Posts: 1,029	actually thats exactly what it is it keeps pressure on the drum so it doesn't rattle chevydog66 it's not welded on __________________ (Only) Member of the CPNE Fan Club Aint that the truth 67 C-10 350 with 3-speed tranny and 308 gears swb step 82 Z28 Camaro 355 small block over 350 hp and a borg warner super t-10 (blown engine) 72 Chevy K20 Suburban (future project) 70 Chevy K20 now 68 GMC K2500 2003 Chevy 2500hd ccsb 4X4 (daily driver)

11-21-2004, 09:17 PM	#6
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,468	Someone Will Correct Me If I'm Wrong, I Used To Work At A Muffler And Brake Shop For Extra Cash In The Afternoons, I Was Told By My Buddy, The Manager, That It's Like Wheel Weights For Drums, Helps Them Stay True Under Excesive Heat, My Old 70 Has/had Them On It. __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

11-21-2004, 09:18 PM	#7
3 on the tree Registered User Join Date: Oct 2004 Posts: 392	Old tech. That spring is to absorb harmonics (noise). Haven't seen one in years except old GM trucks.

11-21-2004, 09:22 PM	#9
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	Yes they ride in a groove and are just rolled on. I figured they were to suppress noise. Can I still buy one to complete my set?. I asked the parts guy today and he had no clue. I couldn't find any info in the service manuals. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

11-21-2004, 10:45 PM	#10
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I think I have one burried some place...I'm making a note to look for it.

11-21-2004, 11:29 PM	#11
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,684	Back when I was wrenching, we use to have leather straps that we wrapped around drums when we were turing them to keep them from "singing". Had thin ones for rotors too. Don't know if they are still doing that or not. __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE

11-21-2004, 11:55 PM	#13
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	Should I get another spring and wrap it around the drum or does it matter that I have one missing? __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

11-21-2004, 11:56 PM	#14
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	you'll never know it's gone. __________________ I'm on the Instagram- @Gearhead_Kevin

11-22-2004, 12:32 AM	#15
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	ok ,thanks for all the replies. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

11-22-2004, 12:42 AM	#16
GlennBrittain Senior Member Join Date: Jun 2003 Location: Panola County Texas Posts: 401	I deep sixed the springs on the 69 C10 SWB, I an drivining, never noticed any diferrance. Balance did not suffer without them. They must have been another nichol and dime item so GM could mark cost.

11-22-2004, 01:36 AM	#17
Arctic Gearhead Registered User Join Date: Nov 2004 Posts: 3	It is a Vibration Dampener True enough!



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11-22-2004, 06:24 AM	#18
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	None of you noticed your drums ringing at highway speed? I noticed it on mine, they ring, like the dork at the fancy resaraunt running his finger around the rim of the wine glass. What totally ticked me off was when I bought 2 brand new drums, no provisions for the springs.

11-22-2004, 10:08 AM	#19
68LSS1 Registered User Join Date: Dec 2002 Location: Tampa Posts: 1,191	Yes, what Longhorn Man said. They are to stop the harmonics that cause a noise not vibration. __________________ '68 Short Step LS1/T56, Hydratech, Fatman Fabrications Stage III, Baer, Hot Rods to Hell, US Body, S&W, etc

11-22-2004, 12:21 PM	#20
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	Well, maybe I'll just put one on to complete the set if I can find one. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

11-22-2004, 12:23 PM	#21
LT4XTREME Registered User Join Date: Nov 2004 Location: MINERAL WELLS WV Posts: 143	Last summer at a car show at the local auto tech center a friend of mine with a sweet black 66 c10 short fleet side was on the chassis dyno when a loud hissing noise started. At first they thought a air line on the dyno blew but when the truck was pulled off this grinding sound was coming from the driverside rear axle. We put the truck in another bay and pulled the wheel and drum and could not see anything wrong. So we put it back together and went to pull it out and it would not budge locked up solid. John the owner had to go out of town for a few days so he left the truck in the shop thinking the new locker and ring & pinion was messed up. Later that week when he got back to check it out again he found that the spring on the drum had expanded due to centrifugal force from running 100mph on the dyno and the spring jumped the groove into the space between the drum and the backing plate. So if you really want to know what the spring is for it's good for a weeks worth of headaches and worry.

11-22-2004, 05:24 PM	#22
Super Duck Chevy Nuttttt Join Date: Sep 2004 Location: Santa Maria Ca. Posts: 568	backing plates off a later truck will bolt on and give you no problem wit hsprins, noise, and give you bigger brakes. kinda cool __________________ 67' Chev swb step side 69' SS elky 03' Chev ext cab 4X4 hey who lernt me to spell is there anything else?

11-22-2004, 06:55 PM	#23
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	They flew off at 100MPH? Something was wrong with them, rusty or streatched. I had my old GMC well over 100 MPH...the needle was pointing to the M in MPH. I held it there for a good 10 min, then I decided to back down. Held it at 100 for at least 1/2 hr. There has been many, many times I have held it at 100 MPH. Never threw a spring.

11-22-2004, 11:08 PM	#24
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	It took 30 min of digging through my junk...but I found one. $10 to your door shipped via USPS. Interested? PM me if so. There is another one too if anyone else is interested.

11-23-2004, 12:09 AM	#25
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	Andy, PM sent. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

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