Rear Auxiliary Spring? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

syncrov69 · 05-14-2008, 01:12 AM

I like to have more info about the optionnal rear Auxiliary Spring. Is it a rare option? Is it possible to found easely a used kit? Can this option really improve the charging capacity? Do you have detailed picture of the plate with the rubber pad screwed on the rear axle/trailing arm? How much is logical to pay for a used kit(left-right)? Is it the option number G60? Thank's for all your answer and picture. Francois

P.S.:sorry for my bad english!

hubcapboy · 05-14-2008, 01:18 AM

A guy down the street from me has a set of these on his '69 LWB C10, I don't know if they're original. they look like half a leaf spring bolted to the frame rail, the "tip" of which rides on the trailing arm.

I thought about buying them to put on my truck ('68 LWB C10) but I moved about 1500lb of concrete the next weekend without my stock springs deflecting more than 2", so I'm a little afraid of what would break first if I were to load up the bed until the aux springs showed deflection. Not to mention what it would do to the coil spring ride...

/g

75 C20 · 05-14-2008, 05:38 AM

my 68 has them ... sorry- the best pic i had

they are orginal- it says it in the glove box

ChevyDude · 05-14-2008, 05:50 AM

I have a set I am going to sell, all original everything there.

grayw0lf · 05-14-2008, 06:06 PM

I'm also curious how they affect that nice coil spring ride. Anyone have any experience?

Sinister · 05-14-2008, 06:11 PM

Quote:

Originally Posted by grayw0lf

I'm also curious how they affect that nice coil spring ride. Anyone have any experience?

I have them on my '69 C-20. They only effect the ride when your fully loaded/over loaded.
I still haven't loaded my truck enough to get them to engage.

**WorkinLonghorn** · 05-14-2008, 06:16 PM

The Data Book shows a G-60 helper spring (500lbs.each) for C20 trucks.Don't know if there was a C10 option.
IIRC they don't come into play until you load the bed so they don't affect the ride when empty.

toomanytoyz · 05-14-2008, 06:38 PM

I have a 72 1/2 Ton with them on it, Any Clue as to Worth?

Thanks, Rick

**passthebuck** · 05-14-2008, 06:58 PM

Both of my GMC 910's have the helper spring option. I have seen very many Canadian made trucks with them. I think it was more common here in Canada. I have bought/sold them for around $50.00CDN. Je ne parle pas français très bon mais j'essaye. Lentement svp.

Michael12 · 05-14-2008, 07:54 PM

I had them on my c-10 1/2ton and when my grandfather and dad had the truck they pulled the camper and loaded it with wood and really used it like a truck and never had problems with bottoming out or anything...

Michael12 · 05-14-2008, 07:55 PM

I just got the frame powdercoated see if i can get a new pic or an old one soon!

syncrov69 · 05-14-2008, 09:12 PM

I have picture pictures of the leaf spring but I don't have any detailed picture of the stopper pad bolted to the trailing arm.

05-14-2008, 01:12 AM	#1
syncrov69 Registered User Join Date: Aug 2007 Location: Laval, Québec, Canada Posts: 175	Rear Auxiliary Spring? I like to have more info about the optionnal rear Auxiliary Spring. Is it a rare option? Is it possible to found easely a used kit? Can this option really improve the charging capacity? Do you have detailed picture of the plate with the rubber pad screwed on the rear axle/trailing arm? How much is logical to pay for a used kit(left-right)? Is it the option number G60? Thank's for all your answer and picture. Francois P.S.:sorry for my bad english! __________________ '71 Custom/10 Deluxe LWB '71 Custom/30 Deluxe Dually

05-14-2008, 01:18 AM	#2
hubcapboy Registered User Join Date: Jun 2007 Location: Albuquerque Posts: 21	Re: Rear Auxiliary Spring? A guy down the street from me has a set of these on his '69 LWB C10, I don't know if they're original. they look like half a leaf spring bolted to the frame rail, the "tip" of which rides on the trailing arm. I thought about buying them to put on my truck ('68 LWB C10) but I moved about 1500lb of concrete the next weekend without my stock springs deflecting more than 2", so I'm a little afraid of what would break first if I were to load up the bed until the aux springs showed deflection. Not to mention what it would do to the coil spring ride... /g

05-14-2008, 05:38 AM	#3
75 C20 Registered User Join Date: Jan 2008 Location: Batesville, IN Posts: 21	Re: Rear Auxiliary Spring? my 68 has them ... sorry- the best pic i had they are orginal- it says it in the glove box

05-14-2008, 05:50 AM	#4
ChevyDude Senior Member Join Date: Jun 2003 Location: Westminster, CO Posts: 3,071	Re: Rear Auxiliary Spring? I have a set I am going to sell, all original everything there. __________________ Alex 1971 Lil' Red 350 SBC 700R4

05-14-2008, 06:06 PM	#5
grayw0lf Registered User Join Date: Apr 2004 Location: Clanton, AL Posts: 1,253	Re: Rear Auxiliary Spring? I'm also curious how they affect that nice coil spring ride. Anyone have any experience? __________________ 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!

05-14-2008, 06:16 PM	#7
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,886	Re: Rear Auxiliary Spring? The Data Book shows a G-60 helper spring (500lbs.each) for C20 trucks.Don't know if there was a C10 option. IIRC they don't come into play until you load the bed so they don't affect the ride when empty. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.

05-14-2008, 06:38 PM	#8
toomanytoyz Luv the Crewcabs Join Date: Aug 2006 Location: Andrews, In. 46702 Posts: 4,097	Re: Rear Auxiliary Spring? I have a 72 1/2 Ton with them on it, Any Clue as to Worth? Thanks, Rick Attached Images __________________ 55 Nomad 52 Willys Truck 67 Stepper 67 Fleet 68 Wrecker 68 Suburban 76 Crewcab 79 Gmc Dumptruck 84 Blazer 86 Crewcab Stepside 87 Iroc 89 GMC Plow Truck 91 Camaro Vert 96 Z71 Stepsde

05-14-2008, 06:58 PM	#9
passthebuck Sisyphus was my mentor! Join Date: Sep 2002 Location: Carleton Place, Ontario CANADA Posts: 984	Re: Rear Auxiliary Spring? Both of my GMC 910's have the helper spring option. I have seen very many Canadian made trucks with them. I think it was more common here in Canada. I have bought/sold them for around $50.00CDN. Je ne parle pas français très bon mais j'essaye. Lentement svp. __________________ passthebuck #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car

05-14-2008, 07:54 PM	#10
Michael12 Registered User Join Date: Dec 2002 Location: Colorado Posts: 57	Re: Rear Auxiliary Spring? I had them on my c-10 1/2ton and when my grandfather and dad had the truck they pulled the camper and loaded it with wood and really used it like a truck and never had problems with bottoming out or anything...

05-14-2008, 07:55 PM	#11
Michael12 Registered User Join Date: Dec 2002 Location: Colorado Posts: 57	Re: Rear Auxiliary Spring? I just got the frame powdercoated see if i can get a new pic or an old one soon!

05-14-2008, 09:12 PM	#12
syncrov69 Registered User Join Date: Aug 2007 Location: Laval, Québec, Canada Posts: 175	Re: Rear Auxiliary Spring? I have picture pictures of the leaf spring but I don't have any detailed picture of the stopper pad bolted to the trailing arm. __________________ '71 Custom/10 Deluxe LWB '71 Custom/30 Deluxe Dually



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