Differences between K10 & K20 Susp. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

smbrouss70 · 06-10-2005, 05:17 PM

Just to fill you in on what I am trying to accomplish, I have a 70 c20 that I am wanting to convert to 4WD, I also have a 72 4WD Blazer chassis that is being converted to 2WD.

Is the 1/2 Ton and 3/4 Ton susp basically the same? Can I use the spring hangers off of the 1/2 Ton Blazer? Besides the difference in axles what else is different?

smbrouss70 · 06-10-2005, 05:19 PM

Looking in my LMC catalog, they show the same part for K10 & K20 leaf springs, that can't be right, can it?

**JIMs70GMC** · 06-10-2005, 05:42 PM

yep, for the fronts.

smbrouss70 · 06-10-2005, 05:46 PM

It's showing the same part # for the back leafs, too.

cellis · 06-11-2005, 02:13 PM

To the best of my knowledge/experience the width of the leaf spring/hangers are the same for 1/2, 3/4 and 1 tons. The difference between each actually lies in the number leafs that each use in their respective spring packs. All aspects of the suspension will be interchangeable.

smbrouss70 · 06-11-2005, 02:28 PM

Thanks cellis, that's what I was hoping!

*1FaastC10* · 06-11-2005, 03:24 PM

Quote:

Originally Posted by cellis

All aspects of the suspension will be interchangeable.

incorrect. the rear leaves come in 2 different lengths. if they are the same length, then yes, they are interchangable. if not, they'll work. you'll just have to move the spring hangers around.

**special-K** · 06-11-2005, 11:11 PM

The axles are the same,but different from the knuckles-out.As far as your 2wd parts,Just get 1/2t spindles-out.

smbrouss70 · 06-12-2005, 01:59 AM

Quote:

Originally Posted by special-K

The axles are the same,but different from the knuckles-out.

The front axles are really the same between 1/2 & 3/4 ton? with the exception of the knuckles out?

**special-K** · 06-12-2005, 08:52 AM

Dana44.

cellis · 06-12-2005, 12:37 PM

Quote:

Originally Posted by 1FaastC10

incorrect. the rear leaves come in 2 different lengths. if they are the same length, then yes, they are interchangable. if not, they'll work. you'll just have to move the spring hangers around.

That's what I like about this forum, you can learn something new everyday. 1FaastC10, do you by chance know the model of trucks inwhich you can find the two different length springs. I've seen entire suspensions swaped between trucks more times than I can count, but have never came across this issue.

k-20 · 06-13-2005, 06:13 AM

Quote:

Originally Posted by cellis

That's what I like about this forum, you can learn something new everyday. 1FaastC10, do you by chance know the model of trucks inwhich you can find the two different length springs. I've seen entire suspensions swaped between trucks more times than I can count, but have never came across this issue.

i have just read this in another forum,88'-98' 1/2t run a 63" rear spring,im not sure about other models,sorry!

06-10-2005, 05:17 PM	#1
smbrouss70 Registered User Join Date: Sep 2003 Location: Rayne, LA Posts: 2,782	Differences between K10 & K20 Susp. Just to fill you in on what I am trying to accomplish, I have a 70 c20 that I am wanting to convert to 4WD, I also have a 72 4WD Blazer chassis that is being converted to 2WD. Is the 1/2 Ton and 3/4 Ton susp basically the same? Can I use the spring hangers off of the 1/2 Ton Blazer? Besides the difference in axles what else is different? __________________ Steven "If dogs don't go to heaven, when I die I want to go wherever they went." -- Will Rogers R.I.P. Oscar R.I.P. Ratchet 1967 Pontiac GTO - Dad was the Original Owner 1970 Chevy 2wd SWB "Oscar's Truck" 1970 Chevy 2wd Blazer "Ratchet's Blazer" 2013 Chevy 2500HD Crew Cab Duramax/Allison Z71 LTZ "Brown Sugar" 2017 Chevy Suburban "BDB" 2020 Chevy Blazer Premier "Foxy" Member of Louisiana Classic Truck Club (LCTC) Shop Build

06-10-2005, 05:19 PM	#2
smbrouss70 Registered User Join Date: Sep 2003 Location: Rayne, LA Posts: 2,782	Looking in my LMC catalog, they show the same part for K10 & K20 leaf springs, that can't be right, can it? __________________ Steven "If dogs don't go to heaven, when I die I want to go wherever they went." -- Will Rogers R.I.P. Oscar R.I.P. Ratchet 1967 Pontiac GTO - Dad was the Original Owner 1970 Chevy 2wd SWB "Oscar's Truck" 1970 Chevy 2wd Blazer "Ratchet's Blazer" 2013 Chevy 2500HD Crew Cab Duramax/Allison Z71 LTZ "Brown Sugar" 2017 Chevy Suburban "BDB" 2020 Chevy Blazer Premier "Foxy" Member of Louisiana Classic Truck Club (LCTC) Shop Build

06-10-2005, 05:42 PM	#3
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	yep, for the fronts. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

06-10-2005, 05:46 PM	#4
smbrouss70 Registered User Join Date: Sep 2003 Location: Rayne, LA Posts: 2,782	It's showing the same part # for the back leafs, too. __________________ Steven "If dogs don't go to heaven, when I die I want to go wherever they went." -- Will Rogers R.I.P. Oscar R.I.P. Ratchet 1967 Pontiac GTO - Dad was the Original Owner 1970 Chevy 2wd SWB "Oscar's Truck" 1970 Chevy 2wd Blazer "Ratchet's Blazer" 2013 Chevy 2500HD Crew Cab Duramax/Allison Z71 LTZ "Brown Sugar" 2017 Chevy Suburban "BDB" 2020 Chevy Blazer Premier "Foxy" Member of Louisiana Classic Truck Club (LCTC) Shop Build

06-11-2005, 02:13 PM	#5
cellis Registered User Join Date: May 2005 Posts: 12	To the best of my knowledge/experience the width of the leaf spring/hangers are the same for 1/2, 3/4 and 1 tons. The difference between each actually lies in the number leafs that each use in their respective spring packs. All aspects of the suspension will be interchangeable. __________________ 82 chevy 6"susp.&3"body, 38.5 Boggers

06-11-2005, 02:28 PM	#6
smbrouss70 Registered User Join Date: Sep 2003 Location: Rayne, LA Posts: 2,782	Thanks cellis, that's what I was hoping! __________________ Steven "If dogs don't go to heaven, when I die I want to go wherever they went." -- Will Rogers R.I.P. Oscar R.I.P. Ratchet 1967 Pontiac GTO - Dad was the Original Owner 1970 Chevy 2wd SWB "Oscar's Truck" 1970 Chevy 2wd Blazer "Ratchet's Blazer" 2013 Chevy 2500HD Crew Cab Duramax/Allison Z71 LTZ "Brown Sugar" 2017 Chevy Suburban "BDB" 2020 Chevy Blazer Premier "Foxy" Member of Louisiana Classic Truck Club (LCTC) Shop Build

06-11-2005, 11:11 PM	#8
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	The axles are the same,but different from the knuckles-out.As far as your 2wd parts,Just get 1/2t spindles-out. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

06-12-2005, 08:52 AM	#10
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Dana44. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

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