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: 8,190	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: 1,055	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: 8,190	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.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.