Drop spring issue - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**ScottH** · 06-06-2014, 02:31 PM

Just installed a new set of CPP 4" rear drop springs. Installed the springs positioned in the same way, new KYB lowered shocks, new cups & hardware both sides. After installing everything the truck is now sitting about an inch higher on the right side. If I measure the installed springs, right one is about 1/2 taller than the other. Unfortunately I did not check the height of the springs next to each other prior to the install. Also I did not touch the stock panhard bar.

Would leaving the stock panhard bar somehow cause this affect?
Or could I have a mismatched set of springs?

Any ideas or suggestions are appreciated. Frustrating after all the work.

Scott

cdowns · 06-06-2014, 04:24 PM

it is the infamous chey lean normal due to tweaked frame with 40years of hard use

RustyBucket · 06-06-2014, 04:25 PM

I'd think the stock length panhard bar would be in a bind w/4" drop springs. Looks like it'd be trying to push the rear end. The distance between the 2 mounting points changes was the truck goes up & down. The previous owner had 3" springs and the stock bar on my '71 and it seemed ok but too high. I swapped to the 4" with a 1" lowering block and an adjustable bar. Levelled out the stance but the ride is too stiff. Well,... it levelled out the stance after I cut 1 coil off the front.

**ScottH** · 06-06-2014, 05:15 PM

I know its been suggested that with a 4" drop I should install an adjustable bar so I will probably just order one and go from there. I could always remove the original bar to see what the affect is.

Lattimer · 06-06-2014, 05:53 PM

I would pull the springs back out and measure them before I went any farther.

WhippinSaw · 07-04-2014, 07:25 PM

Not sure if you got this figured out yet, but I ordered a set of front stock springs from classic parts and after install one side was higher than the other, ordered a set of moog springs and the truck was back to normal, The bad springs were the same height , but compressed differently, in short I got a bum set of springs.

06-06-2014, 02:31 PM	#1
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,187	Drop spring issue Just installed a new set of CPP 4" rear drop springs. Installed the springs positioned in the same way, new KYB lowered shocks, new cups & hardware both sides. After installing everything the truck is now sitting about an inch higher on the right side. If I measure the installed springs, right one is about 1/2 taller than the other. Unfortunately I did not check the height of the springs next to each other prior to the install. Also I did not touch the stock panhard bar. Would leaving the stock panhard bar somehow cause this affect? Or could I have a mismatched set of springs? Any ideas or suggestions are appreciated. Frustrating after all the work. Scott __________________ 1963 C10 swb fleetside 1966 GMC G1000 Handi-bus (future project) 1955 Chevy 2 dr. wagon

06-06-2014, 04:24 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Drop spring issue it is the infamous chey lean normal due to tweaked frame with 40years of hard use __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

06-06-2014, 04:25 PM	#3
RustyBucket Registered User Join Date: Jul 2009 Location: Space Coast, Fl. Posts: 1,050	Re: Drop spring issue I'd think the stock length panhard bar would be in a bind w/4" drop springs. Looks like it'd be trying to push the rear end. The distance between the 2 mounting points changes was the truck goes up & down. The previous owner had 3" springs and the stock bar on my '71 and it seemed ok but too high. I swapped to the 4" with a 1" lowering block and an adjustable bar. Levelled out the stance but the ride is too stiff. Well,... it levelled out the stance after I cut 1 coil off the front. Attached Images __________________ Dad always said, "Son, WISH IN ONE HAND, and ......." -------------------------------------- -------------------------------------- Current toy trucks: '71 GMC 1500 SUPER CUSTOM short/step, orig. dk. blue, 350/700r, ps,pb, A/C '72 Blazer 2wd, ochre & white, 454, tremecTKO 500 5spd. ps, pb, A/C, tilt Last 10yrs of hobby vehicles, had a FEW more in the 50yrs. before these: '66 Plymouth Belvedere City of Miami cop car clone. '70 Nova 406"sb, 13.5-1, solid roller, Brodix, p.glide/t.brake, back halved, 9" Ford, spool 4.88, cage,ladder bar/coilover, 10.5 tire....... SOLD!! '67 C10 short/step side mount spare -- SOLD!! '72 Jimmy 2wd, 350/350, ps, pb, fun driver, lots of bondo & a shiny red paint job..... SOLD!! '69 Nova 350, 4spd, A/C, ps, p.b, ...SOLD!!

06-06-2014, 05:15 PM	#4
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,187	Re: Drop spring issue I know its been suggested that with a 4" drop I should install an adjustable bar so I will probably just order one and go from there. I could always remove the original bar to see what the affect is. __________________ 1963 C10 swb fleetside 1966 GMC G1000 Handi-bus (future project) 1955 Chevy 2 dr. wagon

06-06-2014, 05:53 PM	#5
Lattimer Registered User Join Date: Jan 2013 Location: Mickleton, NJ Posts: 1,776	Re: Drop spring issue I would pull the springs back out and measure them before I went any farther. __________________ Shawn 1970 Chevy C-10 SWB, 350, TKO 600 5 speed My build http://67-72chevytrucks.com/vboard/s...d.php?t=559881

07-04-2014, 07:25 PM	#6
WhippinSaw Registered User Join Date: Aug 2012 Location: Lisle Illinois Posts: 602	Re: Drop spring issue Not sure if you got this figured out yet, but I ordered a set of front stock springs from classic parts and after install one side was higher than the other, ordered a set of moog springs and the truck was back to normal, The bad springs were the same height , but compressed differently, in short I got a bum set of springs. __________________ 1963 Fleet Side cab, Converted Fleet Side Barden bumper, Step Side in the middle.



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