Nobody seems to be able to answer this??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bucannon · 10-03-2011, 05:18 PM

okay ive got a LCA issue. will a 3/4 ton arm fit on a 1/2 ton k frame?

my original thread in the 73-87 board shows pictures.

thanks for any help!

http://67-72chevytrucks.com/vboard/showthread.php?t=486659

crazy longhorn · 10-03-2011, 06:30 PM

Are you buildin 1/2, or 3/4 suspension? 2wd or 4wd? I have to ask this, cause most guys see K, and assume 4wd

The C is 2wd. A little more info would help....crazyl

bucannon · 10-03-2011, 07:40 PM

the truck is a 2wd C-10

okay heres the deal im using lift spindles form a newer body style truck which fit 3/4 ton ball joint, so i just ordered 3/4 lower control arms so they would be new and look fresh under the truck but the LCA shaft will not center up on the k frame because of the tabs that go into the two holes on the LCA shaft...

bucannon · 10-03-2011, 11:04 PM

BMERDOC · 10-03-2011, 11:13 PM

Someone help me here but isn't the 3/4t LCA used to attach the 88-98 spindles/brakes to the earlier trucks because of the ball joint size? I remember reading that on another thread...possibly the FAQ Brake sticky

SCOTI · 10-03-2011, 11:18 PM

Quote:

Originally Posted by BMERDOC

Someone help me here but isn't the 3/4t LCA used to attach the 88-98 spindles/brakes to the earlier trucks because of the ball joint size? I remember reading that on another thread...possibly the FAQ Brake sticky

Correct. 3/4 ton & larger lower arms have a larger OD ball-joint body which coincidently matches the 88-98 1/2 ton size.

bucannon · 10-03-2011, 11:37 PM

Quote:

Originally Posted by SCOTI

Correct. 3/4 ton & larger lower arms have a larger OD ball-joint body which coincidently matches the 88-98 1/2 ton size.

thats correct.

SCOTI · 10-04-2011, 09:32 AM

Quote:

Originally Posted by bucannon

okay ive got a LCA issue. will a 3/4 ton arm fit on a 1/2 ton k frame?

my original thread in the 73-87 board shows pictures.

thanks for any help!

To your original question, the arms will interchange. I have had lower a-arms from a 68 as well as lower a-arms for an 89 C30 bolted up to the same x-member (same 73-87 x-member in 2 different trucks).

bucannon · 10-04-2011, 03:31 PM

Quote:

Originally Posted by SCOTI

To your original question, the arms will interchange. I have had lower a-arms from a 68 as well as lower a-arms for an 89 C30 bolted up to the same x-member (same 73-87 x-member in 2 different trucks).

THANK YOU, i know know that Rock Auto did not properly drill the holes in the control arm shafts.

so looks like ill be getting some local parts store LCA shafts

bucannon · 10-04-2011, 04:17 PM

okay now after looking at the Autozone website i see that the stock photo displays the 3/4 ton LCA shaft with only one hole

WTF???

SCOTI · 10-04-2011, 04:51 PM

From what I remember, there's only one locating hole drilled in the shaft & only one dowel that extends far enough from the x-member to make contact.

usmcchevy · 10-04-2011, 05:07 PM

Quote:

Originally Posted by bucannon

THANK YOU, i know know that Rock Auto did not properly drill the holes in the control arm shafts.

so looks like ill be getting some local parts store LCA shafts

Call Rock auto, In my experience they have made everything right very fast.

crazy longhorn · 10-04-2011, 07:31 PM

Quote:

Originally Posted by SCOTI

From what I remember, there's only one locating hole drilled in the shaft & only one dowel that extends far enough from the x-member to make contact.

Yup, & the pin is to the back side

crazyL

bucannon · 10-05-2011, 03:56 PM

so the rear pin is where it lines up and the front dosent make contact?

does anybody have pictures on some 73-87's

SCOTI · 10-05-2011, 05:04 PM

Quote:

Originally Posted by bucannon

so the rear pin is where it lines up and the front dosent make contact?

does anybody have pictures on some 73-87's

Only one pin should be long enough to make contact. That is what positions the shaft/arm.

10-03-2011, 05:18 PM	#1
bucannon Salty Sailor Join Date: May 2009 Location: Savannah, Ga Posts: 603	Nobody seems to be able to answer this??? okay ive got a LCA issue. will a 3/4 ton arm fit on a 1/2 ton k frame? my original thread in the 73-87 board shows pictures. thanks for any help! http://67-72chevytrucks.com/vboard/showthread.php?t=486659 __________________ 86 c-10 Custom Deluxe Savannah, Georgia

10-03-2011, 06:30 PM	#2
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	Re: Nobody seems to be able to answer this??? Are you buildin 1/2, or 3/4 suspension? 2wd or 4wd? I have to ask this, cause most guys see K, and assume 4wd The C is 2wd. A little more info would help....crazyl __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

10-03-2011, 07:40 PM	#3
bucannon Salty Sailor Join Date: May 2009 Location: Savannah, Ga Posts: 603	Re: Nobody seems to be able to answer this??? the truck is a 2wd C-10 okay heres the deal im using lift spindles form a newer body style truck which fit 3/4 ton ball joint, so i just ordered 3/4 lower control arms so they would be new and look fresh under the truck but the LCA shaft will not center up on the k frame because of the tabs that go into the two holes on the LCA shaft... __________________ 86 c-10 Custom Deluxe Savannah, Georgia

10-03-2011, 11:04 PM	#4
bucannon Salty Sailor Join Date: May 2009 Location: Savannah, Ga Posts: 603	Re: Nobody seems to be able to answer this??? __________________ 86 c-10 Custom Deluxe Savannah, Georgia

10-03-2011, 11:13 PM	#5
BMERDOC Registered User Join Date: Jun 2011 Location: Richmond,Va Posts: 2,934	Re: Nobody seems to be able to answer this??? Someone help me here but isn't the 3/4t LCA used to attach the 88-98 spindles/brakes to the earlier trucks because of the ball joint size? I remember reading that on another thread...possibly the FAQ Brake sticky __________________ Nick Carter 1967 C10 Short bed Fleetside Project Cheap Thrills! 2WD C10 Modern/Performance Alignments Easiest Alignment Ever!

10-04-2011, 04:17 PM	#10
bucannon Salty Sailor Join Date: May 2009 Location: Savannah, Ga Posts: 603	Re: Nobody seems to be able to answer this??? okay now after looking at the Autozone website i see that the stock photo displays the 3/4 ton LCA shaft with only one hole WTF??? Attached Images __________________ 86 c-10 Custom Deluxe Savannah, Georgia

10-04-2011, 04:51 PM	#11
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,068	Re: Nobody seems to be able to answer this??? From what I remember, there's only one locating hole drilled in the shaft & only one dowel that extends far enough from the x-member to make contact. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

10-05-2011, 03:56 PM	#14
bucannon Salty Sailor Join Date: May 2009 Location: Savannah, Ga Posts: 603	Re: Nobody seems to be able to answer this??? so the rear pin is where it lines up and the front dosent make contact? does anybody have pictures on some 73-87's __________________ 86 c-10 Custom Deluxe Savannah, Georgia

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