C20 and C10 Spring rates - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Nima · 02-13-2016, 12:32 PM

Hi:
Are C10 springs and shocks softer than C20s? If yes, are they interchangeable? I have been reading a lot as to how to soften my 67 C20 without going through major expense. I read a lot about bags but since the springs on my truck seems to be stock ones, I thought changing them to a softer rating spring/shocks may be a good first step. My truck is stock height with trailing arm, spring, shock and leaf springs on the back. I also didn't want to swap the axles to C10 since I have already have 4 disc brakes and I kind of like my 8 lug wheels. My truck is not a work truck really.

Thanks,

SS Tim · 02-13-2016, 03:29 PM

67 coil specs.

Nima · 02-13-2016, 10:20 PM

Thank you.
Based on what I read, please correct me if I am wrong, the front standard shocks and springs are the same in C10 and 20s. However,, the rear is different which make sense since C10 is 1/2 ton and C20 is 3/4 ton. But are theses slight changes is rear shock and spring travel and diameter sizes significant enough to prevent them from being interchangeable?

02-13-2016, 12:32 PM	#1
Nima Blue 67 Join Date: Apr 2004 Location: Western WA Posts: 1,179	C20 and C10 Spring rates Hi: Are C10 springs and shocks softer than C20s? If yes, are they interchangeable? I have been reading a lot as to how to soften my 67 C20 without going through major expense. I read a lot about bags but since the springs on my truck seems to be stock ones, I thought changing them to a softer rating spring/shocks may be a good first step. My truck is stock height with trailing arm, spring, shock and leaf springs on the back. I also didn't want to swap the axles to C10 since I have already have 4 disc brakes and I kind of like my 8 lug wheels. My truck is not a work truck really. Thanks, __________________ 1953 GMC 3/4 ton: current project 1967 C20: 5.3 voretc with T5 conversion, 4 wheel 8 lug disc brake 1972 Nova: my 4 door sport sedan! 5.3 voretc + T5 conversion. drivable project, FUN!! 1979 Camaro Z28: 5.3 vortec conversion with build TH350: drivable project, Fun to drive 1992 Camaro RS convertible (Z28 clone): 5.3 conversion with build T5: on going project 2005 Silverado 2500, 4x4 Duramax, original owner

02-13-2016, 03:29 PM	#2
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: C20 and C10 Spring rates 67 coil specs. Attached Images __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban Last edited by SS Tim; 02-13-2016 at 03:46 PM.

02-13-2016, 10:20 PM	#3
Nima Blue 67 Join Date: Apr 2004 Location: Western WA Posts: 1,179	Re: C20 and C10 Spring rates Thank you. Based on what I read, please correct me if I am wrong, the front standard shocks and springs are the same in C10 and 20s. However,, the rear is different which make sense since C10 is 1/2 ton and C20 is 3/4 ton. But are theses slight changes is rear shock and spring travel and diameter sizes significant enough to prevent them from being interchangeable? __________________ 1953 GMC 3/4 ton: current project 1967 C20: 5.3 voretc with T5 conversion, 4 wheel 8 lug disc brake 1972 Nova: my 4 door sport sedan! 5.3 voretc + T5 conversion. drivable project, FUN!! 1979 Camaro Z28: 5.3 vortec conversion with build TH350: drivable project, Fun to drive 1992 Camaro RS convertible (Z28 clone): 5.3 conversion with build T5: on going project 2005 Silverado 2500, 4x4 Duramax, original owner



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