Spring on front drums? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**70STOVEBOLT** · 06-28-2005, 02:23 PM

What are the springs wrapped around the front brake drums for? I have a noise coming from that area at low speed (30-45 mph) and it goes away above 50 mph. It sounds like it's either that spring rattling or a trim ring on the rim or something. Anybody know what it could be?

70c10 · 06-28-2005, 02:53 PM

The spring is supposed to be for suppressing vibration. I was missing one on my front drum and replaced it and it made no difference whatsoever.

Sweet72 · 06-28-2005, 07:28 PM

like 70c10 says it's supposed to reduce harmonics. brake drums can ring like a bell when they're squealing. too bad the search function isn't working cause there was a long thread on this very subject. The conclusion of the previous thread was that these springs are not necessary for normal brake function, however if a squeal developes you may notice a slight reduction in noise and embarrassment.

06-28-2005, 02:23 PM	#1
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,357	Spring on front drums? What are the springs wrapped around the front brake drums for? I have a noise coming from that area at low speed (30-45 mph) and it goes away above 50 mph. It sounds like it's either that spring rattling or a trim ring on the rim or something. Anybody know what it could be?

06-28-2005, 02:53 PM	#2
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	The spring is supposed to be for suppressing vibration. I was missing one on my front drum and replaced it and it made no difference whatsoever. __________________ 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

06-28-2005, 07:28 PM	#3
Sweet72 Registered User Join Date: Nov 2003 Location: Alexandria, VA Posts: 1,534	like 70c10 says it's supposed to reduce harmonics. brake drums can ring like a bell when they're squealing. too bad the search function isn't working cause there was a long thread on this very subject. The conclusion of the previous thread was that these springs are not necessary for normal brake function, however if a squeal developes you may notice a slight reduction in noise and embarrassment. __________________ '72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction. Last edited by Sweet72; 06-28-2005 at 07:31 PM.

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