Control arms question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1971-tetanus-shot · 10-18-2006, 09:35 PM

Are the lower control arms the same on a 71 c-20 and a c-10? I know they have different balljoints but am unsure if they are the same arms or not
Thanks

qksilver · 10-18-2006, 10:06 PM

Long horn man would be the one.....
I think they are different but that is a maybe

Aarons72s · 10-19-2006, 04:21 AM

No they are not the same. The ball joint hole is a larger diameter on the c20 arm. The only reason I know this is I was planning to up grade one of my trucks to 3/4 ton suspension and was seeing what I could use. Sorry.
Aaron

GMCBubba · 10-19-2006, 02:06 PM

Sorry for the possibly stupid question, I'm new at this. But Aaron, what are your reasons to upgrade to 3/4 ton suspension? Early Classic specifically sells spindles to downgrade the C20s to "the better riding C10 suspension." Thanks for the help. I should be getting my 69 3/4 GMC soon and am thinking about suspension changes already. Thanks. mgd

70rs/ss · 10-19-2006, 02:15 PM

The arms are different but the same. They will swap over, but are reinforced (makes them resist flex). Long and short beds arms too are the same, I'll even go one further the 66 and back arms fit too!! I jacked a set off of a 64-66 3/4 ton to put on my rusty 1/2 ton, man did it stiffen things up!! better and cheaper than using aftermarket built arms!!

D@mn it I should read closer, I am talking about REAR control arms and the thread is about Front lowers, so I have no help on this!

Aarons72s · 10-20-2006, 04:50 AM

Quote:

Originally Posted by GMCBubba

Sorry for the possibly stupid question, I'm new at this. But Aaron, what are your reasons to upgrade to 3/4 ton suspension? Early Classic specifically sells spindles to downgrade the C20s to "the better riding C10 suspension." Thanks for the help. I should be getting my 69 3/4 GMC soon and am thinking about suspension changes already. Thanks. mgd

No offence taken. The reason is so I can hall more. And I love the big ho52 axles. I am not a big fan of 1/2 ton rear axles. Have had several bad and expensive experiances and other things I would rather not get into. I prefer full floating axles. Ride quality is not an issue for me. For me the rougher the better. I can be in my truck going 70 down a gravel road bouncing all over the place and am happy. Now if you put me in a smooth riding car, like say a ford tauraus or my dodge aries, on a long trip or on bumpy roads I get motion sickness. I know it sounds like wtf but it is just me.
Aaron

10-18-2006, 09:35 PM	#1
1971-tetanus-shot Registered User Join Date: Sep 2006 Location: PA Posts: 30	Control arms question Are the lower control arms the same on a 71 c-20 and a c-10? I know they have different balljoints but am unsure if they are the same arms or not Thanks

10-18-2006, 10:06 PM	#2
qksilver Senior Member Join Date: Dec 2004 Location: Southern Pines NC Posts: 3,853	Re: Control arms question Long horn man would be the one..... I think they are different but that is a maybe

10-19-2006, 04:21 AM	#3
Aarons72s Registered User Join Date: Apr 2006 Location: oklahoma Posts: 10,669	Re: Control arms question No they are not the same. The ball joint hole is a larger diameter on the c20 arm. The only reason I know this is I was planning to up grade one of my trucks to 3/4 ton suspension and was seeing what I could use. Sorry. Aaron Last edited by Aarons72s; 10-19-2006 at 04:21 AM.

10-19-2006, 02:06 PM	#4
GMCBubba Registered User Join Date: Oct 2006 Location: Simpsonville, SC Posts: 255	Re: Control arms question Sorry for the possibly stupid question, I'm new at this. But Aaron, what are your reasons to upgrade to 3/4 ton suspension? Early Classic specifically sells spindles to downgrade the C20s to "the better riding C10 suspension." Thanks for the help. I should be getting my 69 3/4 GMC soon and am thinking about suspension changes already. Thanks. mgd

10-19-2006, 02:15 PM	#5
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,270	Re: Control arms question The arms are different but the same. They will swap over, but are reinforced (makes them resist flex). Long and short beds arms too are the same, I'll even go one further the 66 and back arms fit too!! I jacked a set off of a 64-66 3/4 ton to put on my rusty 1/2 ton, man did it stiffen things up!! better and cheaper than using aftermarket built arms!! D@mn it I should read closer, I am talking about REAR control arms and the thread is about Front lowers, so I have no help on this! Last edited by 70rs/ss; 10-19-2006 at 02:41 PM.



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