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10-13-2024, 12:36 PM
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#1 |
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Registered User
Join Date: Jun 2011
Location: Central OR
Posts: 723
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Coil spring helper leaf.
I pulled an HO72 4:10 diff out of a chassis with just a 67-70 bumper on it for my 55 dually. It had the Chevy coils with a leaf helper. What's ths scoop on these?
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1955 GMC 250 8 Flatbed 1971 C30 157" 350 4spd 10' Flatbed 81 GMC K30 CnC 9' Flatbed 454 T400 89 GMC Jimmy Stock https://67-72chevytrucks.com/vboard/...d.php?t=810958 71 LT1 Convertible, 72 Coupe 69 CJ5, 75 CJ6, 67 M715, 72 M35A2 Bobbed, 95 XLC2 |
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10-13-2024, 01:24 PM
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#2 |
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Post Whore
 
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,268
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Re: Coil spring helper leaf.
They're a factory option. It should be listed on the truck's SPID.
http://67-72chevytrucks.com/vboard/s...d.php?t=600642
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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10-13-2024, 02:34 PM
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#3 |
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Registered User
Join Date: Jul 2008
Location: Eastern Oregon
Posts: 2,378
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Re: Coil spring helper leaf.
I have a 71 C/20 with those from the factory. I use the pickup for one thing bringing in firewood. It always amazes me just how much the truck can carry. I have had wood stacked up three feet over the cab roof with little effect. Never on road just my property.
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71 C-20 07 Magnum RT AWD |
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10-13-2024, 02:42 PM
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#4 |
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Registered User
Join Date: Jul 2021
Location: Keller, Texas
Posts: 511
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Re: Coil spring helper leaf.
My 72 Cheyenne Super C20 has them on it. The SPID shows them as an Auxiliary Spring 1G6010.
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Darrell  1972 Cheyenne Super C20 (My Fun Drive) 2000 S10 Xtreme (My Drag Truck) |
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10-13-2024, 08:01 PM
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#5 |
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Senior Member
Join Date: Aug 2005
Location: Los Angeles
Posts: 1,348
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Re: Coil spring helper leaf.
Coil springs, helpers, HO72 rear axle, and dual rear wheels?
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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10-14-2024, 08:57 PM
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#6 |
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Registered User
Join Date: May 2016
Location: Waverly, NE
Posts: 343
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Re: Coil spring helper leaf.
I installed a set of those on my 1/2 ton. I remove the springs for regular duty and just driving around, I put them in when I am hauling my car trailer. They really help with squat in the back with a fairly heavy tongue weight and really help reduce sway. The springs are easy to remove, just one big bolt on each side.
My truck is lowered so the springs just about touch the bracket on the axle when it is empty, point being they help right away with any weight at all in the back.
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1965 Malibu SS L79 Restoration Page 1965 Two-Door Wagon Project Progress Page 2006 Pontiac GTO Preservation Project Rich Cummings Last edited by Rich69shortfleet; 10-15-2024 at 09:39 PM. |
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10-15-2024, 02:21 PM
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#7 |
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State of Confusion!
 
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 47,064
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Re: Coil spring helper leaf.
I have them on my 70 C10 also. Like mentioned they are great for preventing squat on heavy loads or towing
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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10-15-2024, 05:41 PM
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#8 |
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Registered User
Join Date: Sep 2013
Location: Quakertown, Pa.
Posts: 115
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Re: Coil spring helper leaf.
I used an older setup with multiple springs. Still attaches the same way as the single leaf helper.
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John 1967 C20 2WD Longbed 2001 2500 HD 4X4 Extended cab long bed 
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10-15-2024, 06:28 PM
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#9 |
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Senior Member
Join Date: Aug 2005
Location: Los Angeles
Posts: 1,348
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Re: Coil spring helper leaf.
That chassis in the picture must have been a C-20 with RO5 dual rear wheels. Rare combination.
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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10-15-2024, 10:18 PM
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#10 |
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Registered User
Join Date: Jun 2011
Location: Central OR
Posts: 723
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Re: Coil spring helper leaf.
Thanks for the info on the interesting option.
I am just happy to get rid of my 514s and find 410s so close to home with easy access. If any one needs the helpers, they are on Tumalo Rd. in Tumalo OR. The owner has a backhoe to flip it. It and the rest of his junk are getting scrapped.
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1955 GMC 250 8 Flatbed 1971 C30 157" 350 4spd 10' Flatbed 81 GMC K30 CnC 9' Flatbed 454 T400 89 GMC Jimmy Stock https://67-72chevytrucks.com/vboard/...d.php?t=810958 71 LT1 Convertible, 72 Coupe 69 CJ5, 75 CJ6, 67 M715, 72 M35A2 Bobbed, 95 XLC2 |
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