Urgent help needed! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SCOTI · 07-13-2009, 08:02 PM

I need to know the width of the coil spring pads on a coil suspension rear housing. I'm trying to mark the rear wheelbase C/L & need to know this dimension but I don't have the rear end here @ the shop w/the frame & trailing arm stuff.

If someone has one they could measure quickly, it would be a big help. I'm looking for the dimension between the C/L of the u-bolts toward the rear of the frame.... Scot.

ratrod67 · 07-13-2009, 08:08 PM

You need a measurement off a rearend or frame? I'm not understanding exactly.

JP2120 · 07-13-2009, 08:09 PM

Quote:

Originally Posted by ratrod67

You need a measurement off a rearend or frame? I'm not understanding exactly.

The coil spring is mounted on top of the trailing arm and has a long bolt that goes thru the arm from the bottom and there is a metal disk about 3 1/4 inches in width that is held down with a nut to the bolt. The disk clamps the spring in place. The upper portion of the spring is clamped to the frame in a similar fashion.

Mine is a 1971 1/2 ton and this is how mine is designed.

SCOTI · 07-13-2009, 08:12 PM

Quote:

Originally Posted by ratrod67

You need a measurement off a rearend or frame? I'm not understanding exactly.

I need the distance between the u-bolt holes/pads as measured from the back side of the housing vs the front. If I have the 'perches' too far apart, the wheelbase gets shorter. To close together & the wheelbase increases.

Make sense?

ratrod67 · 07-13-2009, 08:16 PM

Hang on..

JP2120 · 07-13-2009, 08:21 PM

Quote:

Originally Posted by SCOTI

I need the distance between the u-bolt holes/pads as measured from the back side of the housing vs the front. If I have the 'perches' too far apart, the wheelbase gets shorter. To close together & the wheelbase increases.

Make sense?

You say U-Bolts. I thought u-bolts were used on leaf spring setup not on coil springs. What year make and model is it ?

SCOTI · 07-13-2009, 08:25 PM

Quote:

Originally Posted by JP2120

You say U-Bolts. I thought u-bolts were used on leaf spring setup not on coil springs. What year make and model is it ?

Coil spring rears use two big honkin' u-bolts vs. lesf rears that use four smaller u-bolts. Year of the housing does not matter as the perches are the same distance apart (the 71-72 rears just had longer widths).

ratrod67 · 07-13-2009, 08:26 PM

yes,no, maybe so?? All done from center to center

my67chevytruck · 07-13-2009, 08:27 PM

Quote:

Originally Posted by JP2120

You say U-Bolts. I thought u-bolts were used on leaf spring setup not on coil springs. What year make and model is it ?

There is a ubolt that mounts the rearend to the trailing arm on coil spring trucks as well.

SCOTI · 07-13-2009, 08:29 PM

Quote:

Originally Posted by ratrod67

yes,no, maybe so?? All done from center to center

I just need the distance between the u-bolts (pass side to driver side; not the entire rear housing width).

JP2120 · 07-13-2009, 08:30 PM

Quote:

Originally Posted by SCOTI

Coil spring rears use two big honkin' u-bolts vs. lesf rears that use four smaller u-bolts. Year of the housing does not matter as the perches are the same distance apart (the 71-72 rears just had longer widths).

I gotcha now ! The forward holes on mine are 39 inches apart. Sorry for the confusion on my part

ratrod67 · 07-13-2009, 08:35 PM

Look at the 3rd and 4th pics. Trying to show the measurement center to center of the u bolts for the front of the pad and the rear.

SCOTI · 07-13-2009, 08:37 PM

Quote:

Originally Posted by ratrod67

Look at the 3rd and 4th pics. Trying to show the measurement center to center of the u bolts for the front of the pad and the rear.

Ok... When we looked @ that pic, it looked like you were measuring from the backing plate. So that measurement of 42" was from the C/L of the u-bolt to the C/L of the u-bolt @ the rear of the 'perch' correct?

ratrod67 · 07-13-2009, 08:40 PM

Quote:

Originally Posted by SCOTI

Ok... When we looked @ that pic, it looked like you were measuring from the backing plate. So that measurement of XXX was from the C'L of the u-bolt to the C/L of the u-bolt correct?

Yes. Both front and rear on the mounting pad. Sorry, on the 1st pic I was trying to show there were 2 pins in the center of the pad on both sides and the u bolts on top of them so I could get a "straight across" measurement since the center section is in the way.

ratrod67 · 07-13-2009, 08:41 PM

Quote:

Originally Posted by SCOTI

Ok... When we looked @ that pic, it looked like you were measuring from the backing plate. So that measurement of 42" was from the C/L of the u-bolt to the C/L of the u-bolt @ the rear of the 'perch' correct?

Yes at the rear and 39 and some change on the front side.

my67chevytruck · 07-13-2009, 08:44 PM

I show 42 1/4 from outside ubolt to outside ubolt on the rear of a 72 parts truck im dismantling, the rear is still installed thus the outside ubolt to outside ubolt measurement.

SCOTI · 07-13-2009, 08:45 PM

Thank you very much. Next time there's a truck function in our area, the first few cold, frothy beverages are on me!

ratrod67 · 07-13-2009, 08:47 PM

Quote:

Originally Posted by SCOTI

Thank you very much. Next time there's a truck function in our area, the first few cold, frothy beverages are on me!

Sounds like a plan.

07-13-2009, 08:02 PM	#1
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,031	Urgent help needed! I need to know the width of the coil spring pads on a coil suspension rear housing. I'm trying to mark the rear wheelbase C/L & need to know this dimension but I don't have the rear end here @ the shop w/the frame & trailing arm stuff. If someone has one they could measure quickly, it would be a big help. I'm looking for the dimension between the C/L of the u-bolts toward the rear of the frame.... Scot. __________________ 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.*

07-13-2009, 08:08 PM	#2
ratrod67 Registered User Join Date: Sep 2002 Location: DFW Texas Posts: 2,270	Re: Urgent help needed! You need a measurement off a rearend or frame? I'm not understanding exactly.

07-13-2009, 08:16 PM	#5
ratrod67 Registered User Join Date: Sep 2002 Location: DFW Texas Posts: 2,270	Re: Urgent help needed! Hang on..

07-13-2009, 08:26 PM	#8
ratrod67 Registered User Join Date: Sep 2002 Location: DFW Texas Posts: 2,270	Re: Urgent help needed! yes,no, maybe so?? All done from center to center Attached Images Last edited by ratrod67; 07-13-2009 at 08:26 PM.

07-13-2009, 08:35 PM	#12
ratrod67 Registered User Join Date: Sep 2002 Location: DFW Texas Posts: 2,270	Re: Urgent help needed! Look at the 3rd and 4th pics. Trying to show the measurement center to center of the u bolts for the front of the pad and the rear.

07-13-2009, 08:44 PM	#16
my67chevytruck Under Construction Join Date: Oct 2007 Location: Midlothian,TX (DFW) Posts: 4,555	Re: Urgent help needed! I show 42 1/4 from outside ubolt to outside ubolt on the rear of a 72 parts truck im dismantling, the rear is still installed thus the outside ubolt to outside ubolt measurement. __________________ Heath subscribe to the board here: http://67-72chevytrucks.com/vboard/payments.php http://67-72chevytrucks.com/vboard/s...d.php?t=157669 FAQ how to's 1956 Chevy Apache 1967 C10 SWB FleetSide (under construction) 1969 K10 SWB FleetSide (Future Build) 1972 C10 SWB Stepside (Future Build) 56 chevy truck : http://www.cardomain.com/ride/2955823/1 67 truck build: http://www.67-72chevytrucks.com/vboard/showthread.php?t=281357/1 69 k10: http://67-72chevytrucks.com/vboard/s...d.php?t=389470

07-13-2009, 08:45 PM	#17
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,031	Re: Urgent help needed! Thank you very much. Next time there's a truck function in our area, the first few cold, frothy beverages are on me! __________________ 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.*



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