Where to measure to get center for rear? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

phantom dually · 11-30-2003, 10:11 PM

I need to find center for the rear end on the frame. The truck is a LWB 83 c10. I am putting a four link in the rear and need to center it to weld some backets on?? Is there a general measuring point anywhere.

SCOTI · 12-01-2003, 01:07 AM

Couldn't you put a square on the axle flange hubs (a plumb bob would work better). Mark the floor & measure the distance between. It would be hard to mark the pumpkin, so then measure & mark 1/4's on the axle housing from each half.

**GMCPaul** · 12-01-2003, 04:51 AM

I always measure from the brake backing plate to outside edge of frame on both sides, once I have same measurement both sides I know I'm centered.
GMCPaul

phantom dually · 12-01-2003, 10:40 PM

I should have clarified a little more. I am trying to center the rearend front to rear. Since I have taken out the leafs I am not sure were it is.

SCOTI · 12-02-2003, 01:35 AM

I would take the time to mount the bed. Center the axle hub in the wheelwell @ rideheight, & hang a plumbob for a true C/L. I know it's more work, but my guess is you'll sleep much better knowing it's going to look right once it all goes together.

72MARIO · 12-02-2003, 11:52 PM

I second that.

phantom dually · 12-03-2003, 12:22 AM

Thats is not a bed idea SCOTI. I can always shorten or lengthen a drive shaft, but chances are I wont have to. Thanks

ShamrockCustoms · 12-03-2003, 12:48 AM

go by your wheelbase. mark exact point of centerline of front wheels, run the length of the wheelbase and transfer the exact endpoint to the center of you hub on your rear axle.

also, the mounting plate for the leaf springs has the hole in the center that can be used for reference when use with the bumpstop center. they're made to match up, i believe.

good luck!

PS: when you line up that rearend, make sure you have the frame at ride height. if its out of position, your driveshaft measurement can be off later. oh, and dont forget to set the pinion angle on that rear BEFORE you put those brackets on!!

11-30-2003, 10:11 PM	#1
phantom dually Project92 SWB stepside Join Date: Feb 2003 Location: Louisville KY Posts: 4,792	Where to measure to get center for rear? I need to find center for the rear end on the frame. The truck is a LWB 83 c10. I am putting a four link in the rear and need to center it to weld some backets on?? Is there a general measuring point anywhere. __________________ 92 C1500 stepside 496 Stroker Competiton Engineering Ladder bars/QA1 coilovers. Dana 60 rear with 4.10 gear and posi. Bonspeed Palisade 20x12 in rear w/335/30/20 and 20x8.5 front w/245/40/20. 5/8 drop with Belltech springs/DJM spindles/drop shocks. WWS Progress thread http://67-72chevytrucks.com/vboard/s...d.php?t=140448

12-01-2003, 01:07 AM	#2
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,071	Couldn't you put a square on the axle flange hubs (a plumb bob would work better). Mark the floor & measure the distance between. It would be hard to mark the pumpkin, so then measure & mark 1/4's on the axle housing from each half. __________________ 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.*

12-01-2003, 04:51 AM	#3
GMCPaul Senior Member Join Date: Mar 2000 Location: Rockville,In. USA Posts: 3,721	I always measure from the brake backing plate to outside edge of frame on both sides, once I have same measurement both sides I know I'm centered. GMCPaul __________________ Secure Online Catalog for-GMCPauls Truck Parts Email- GMCPAULS@GMAIL.COM

12-01-2003, 10:40 PM	#4
phantom dually Project92 SWB stepside Join Date: Feb 2003 Location: Louisville KY Posts: 4,792	I should have clarified a little more. I am trying to center the rearend front to rear. Since I have taken out the leafs I am not sure were it is. __________________ 92 C1500 stepside 496 Stroker Competiton Engineering Ladder bars/QA1 coilovers. Dana 60 rear with 4.10 gear and posi. Bonspeed Palisade 20x12 in rear w/335/30/20 and 20x8.5 front w/245/40/20. 5/8 drop with Belltech springs/DJM spindles/drop shocks. WWS Progress thread http://67-72chevytrucks.com/vboard/s...d.php?t=140448

12-02-2003, 01:35 AM	#5
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,071	I would take the time to mount the bed. Center the axle hub in the wheelwell @ rideheight, & hang a plumbob for a true C/L. I know it's more work, but my guess is you'll sleep much better knowing it's going to look right once it all goes together. __________________ 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.*

12-02-2003, 11:52 PM	#6
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	I second that. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

12-03-2003, 12:22 AM	#7
phantom dually Project92 SWB stepside Join Date: Feb 2003 Location: Louisville KY Posts: 4,792	Thats is not a bed idea SCOTI. I can always shorten or lengthen a drive shaft, but chances are I wont have to. Thanks __________________ 92 C1500 stepside 496 Stroker Competiton Engineering Ladder bars/QA1 coilovers. Dana 60 rear with 4.10 gear and posi. Bonspeed Palisade 20x12 in rear w/335/30/20 and 20x8.5 front w/245/40/20. 5/8 drop with Belltech springs/DJM spindles/drop shocks. WWS Progress thread http://67-72chevytrucks.com/vboard/s...d.php?t=140448

12-03-2003, 12:48 AM	#8
ShamrockCustoms Project56 on hold Join Date: Aug 2003 Location: Burleson, TX Posts: 489	go by your wheelbase. mark exact point of centerline of front wheels, run the length of the wheelbase and transfer the exact endpoint to the center of you hub on your rear axle. also, the mounting plate for the leaf springs has the hole in the center that can be used for reference when use with the bumpstop center. they're made to match up, i believe. good luck! PS: when you line up that rearend, make sure you have the frame at ride height. if its out of position, your driveshaft measurement can be off later. oh, and dont forget to set the pinion angle on that rear BEFORE you put those brackets on!! Last edited by ShamrockCustoms; 12-03-2003 at 12:51 AM.



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