Installed CPP rear 5" drop coils...and now I have a problem. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cruize2000 · 03-03-2011, 01:21 AM

After installing the coils, the sides are uneven. I have 1" difference measuring between the frame and the trailing arm. You can definitely notice that the passenger side coil is more compressed. The shocks are brand new and the part numbers on each coil match. Anyone ever experience this before?
Posted via Mobile Device

rogergodding · 03-03-2011, 01:37 AM

I have not had this problem, but I know that the springs sit in "cups", make sure they are seated properly. That is most likely the issue...

VA72C10 · 03-03-2011, 01:38 AM

If it isn't the cups on the trailing arms, Try contacting CPP jeff. Sounds like they may have been mis-labeled or just made wrong....
I've heard of people getting the wrong springs labeled correctly but not the right drop beore....from CPP and other vendors too....

cruize2000 · 03-03-2011, 12:09 PM

I just posted pics and you can definitely see the difference in coil compression.

**N2TRUX** · 03-03-2011, 12:14 PM

As mentioned, talk with Jeff at CPP. If it can be made right, he will do it.

Jessechop · 03-03-2011, 12:14 PM

Looks like you are sitting on jack stands? If so that will do it if one stand is in a different spot, even by the slightest amount. Or have ou checked with wheels on sitting on the ground?

clos69 · 03-03-2011, 12:39 PM

i dont know if there is a difference on each end...but from the pics it looks like you installed them upside down..or might need an adjustable bar.

cdowns · 03-03-2011, 01:14 PM

finish the installation including the adjustable panhard bar then center the rear housing with the adjustable panhard put wheels and tires on and see then what the result is in ride height

cruize2000 · 03-03-2011, 01:18 PM

Quote:

Originally Posted by clos69

i dont know if there is a difference on each end...but from the pics it looks like you installed them upside down..or might need an adjustable bar.

Yeah, I thought about that too but didn't notice a difference on the ends. I'll try playing around with the location of the jackstands and see if that makes a difference. Thanks guys.

VA72C10 · 03-03-2011, 01:35 PM

Quote:

Originally Posted by cdowns

finish the installation including the adjustable panhard bar then center the rear housing with the adjustable panhard put wheels and tires on and see then what the result is in ride height

Definitely good advice. I responded before your pictures were up. I wouldn't mess around with the jackstand location...just get it all installed and set it down and most likely it will be fine.

screamin_c10 · 03-03-2011, 02:13 PM

If you have the front wheels on an uneven surface or up on jack stands that can throw off the rear end as well.... As CDOWNS and others have said finish up the entire install, make sure your tires are all aired up to the correct pressure, then pull the truck onto level ground and measure the ground to wheel well or ground to marker lights on all 4 corners....There will be slight variation side to side, but that is to be expected.

Richard H. · 03-03-2011, 02:37 PM

Or...since it is so clean and easy to do ,why not swap the springs with each other and see if the problem reverses.

**leddzepp** · 03-03-2011, 02:59 PM

After it is all buttoned up, on the ground and ready to roll, if you still have the height difference issue, you probably have one spring installed upside down. They do look very similar at both ends...but there is a slight difference in them. I have CPP 5" rear drop springs and had the same problem. I flipped over the spring that was on the "taller" side and that solved it. It also helps to drive around for a while to help everything settle.

67Slider · 03-03-2011, 03:01 PM

subscribed. I had the same problem. Curious to see what the answer is.

**72peace** · 03-03-2011, 03:33 PM

If you look closely at the photos you'll notice one of the three large loops are closer to the frame, on one it's closer on the top, and the other it's closer on the bottom. Just looking, it would appear one is upside down. IMHO.

Frkypunk70 · 03-03-2011, 05:38 PM

Looks to me that on the pic on the right the cpp logo is upside down. On my truck you can read the logos. I'm guessing thats the one that is the wrong way.

03-03-2011, 01:21 AM	#1
cruize2000 Registered User Join Date: Sep 2010 Location: Kansas City Posts: 18	Installed CPP rear 5" drop coils...and now I have a problem. After installing the coils, the sides are uneven. I have 1" difference measuring between the frame and the trailing arm. You can definitely notice that the passenger side coil is more compressed. The shocks are brand new and the part numbers on each coil match. Anyone ever experience this before? Posted via Mobile Device Attached Images Last edited by cruize2000; 03-03-2011 at 12:08 PM.

03-03-2011, 01:37 AM	#2
rogergodding Registered User Join Date: Aug 2007 Location: Sachse, Texas Posts: 614	Re: Installed CPP rear 5" drop coils...and now I have a problem. I have not had this problem, but I know that the springs sit in "cups", make sure they are seated properly. That is most likely the issue...

03-03-2011, 01:38 AM	#3
VA72C10 VA72C10 Join Date: Mar 2008 Location: Midlothian, VA Posts: 25,269	Re: Installed CPP rear 5" drop coils...and now I have a problem. If it isn't the cups on the trailing arms, Try contacting CPP jeff. Sounds like they may have been mis-labeled or just made wrong.... I've heard of people getting the wrong springs labeled correctly but not the right drop beore....from CPP and other vendors too.... __________________ Looking for a 67-72 swb or blazer project in or around VA. Last edited by VA72C10; 03-03-2011 at 01:38 AM.

03-03-2011, 12:09 PM	#4
cruize2000 Registered User Join Date: Sep 2010 Location: Kansas City Posts: 18	Re: Installed CPP rear 5" drop coils...and now I have a problem. I just posted pics and you can definitely see the difference in coil compression.

03-03-2011, 12:14 PM	#5
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Re: Installed CPP rear 5" drop coils...and now I have a problem. As mentioned, talk with Jeff at CPP. If it can be made right, he will do it. __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

03-03-2011, 12:14 PM	#6
Jessechop Registered User Join Date: Sep 2003 Location: maine Posts: 191	Re: Installed CPP rear 5" drop coils...and now I have a problem. Looks like you are sitting on jack stands? If so that will do it if one stand is in a different spot, even by the slightest amount. Or have ou checked with wheels on sitting on the ground?

03-03-2011, 12:39 PM	#7
clos69 Its Topless Season!!!! Join Date: Jul 2007 Location: fort worth, tx Posts: 1,657	Re: Installed CPP rear 5" drop coils...and now I have a problem. i dont know if there is a difference on each end...but from the pics it looks like you installed them upside down..or might need an adjustable bar. __________________ -Carlos- The of America *1967 SWB Custom C-10* *(Celeste)* Join the *Patina Club* Last edited by clos69; 03-03-2011 at 12:40 PM.

03-03-2011, 01:14 PM	#8
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Installed CPP rear 5" drop coils...and now I have a problem. finish the installation including the adjustable panhard bar then center the rear housing with the adjustable panhard put wheels and tires on and see then what the result is in ride height __________________ 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

03-03-2011, 02:13 PM	#11
screamin_c10 I dun gradjiated collij!!! Join Date: Jan 2006 Location: St. Helens Oregon Posts: 1,750	Re: Installed CPP rear 5" drop coils...and now I have a problem. If you have the front wheels on an uneven surface or up on jack stands that can throw off the rear end as well.... As CDOWNS and others have said finish up the entire install, make sure your tires are all aired up to the correct pressure, then pull the truck onto level ground and measure the ground to wheel well or ground to marker lights on all 4 corners....There will be slight variation side to side, but that is to be expected. __________________ Built NOT Bought. Viper Red 1971 LWB C10 355 Vortec W/700R4 4/5 drop AKA Screamin' You are missed! 2006 F150 XLT 5.4L Triton Rollin' on 22s the "F1" 67 C20 PS/AC/327/TH400 we call 'er "Bessie" 67 Malibu PS/ZR1-LS1 Brakes/350 Vortec/700R4 2/2 drop on 18" 338s - Tracy's "Boo" Boosted '67 Cougar EFI 5.0 HO roller motor/T5/8.8 Tracloc/ 4 wheel disks - "Project Panther" 79 Honda Z50 - stretched, cafe'd and hotrodded 125CC Lifan/5spd FEAR THE MONKEY!

03-03-2011, 02:37 PM	#12
Richard H. Spanked once Join Date: Oct 2006 Location: Intheshop, Indiana Posts: 969	Re: Installed CPP rear 5" drop coils...and now I have a problem. Or...since it is so clean and easy to do ,why not swap the springs with each other and see if the problem reverses. __________________ The ole 350 budget build.

03-03-2011, 02:59 PM	#13
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 19,996	Re: Installed CPP rear 5" drop coils...and now I have a problem. After it is all buttoned up, on the ground and ready to roll, if you still have the height difference issue, you probably have one spring installed upside down. They do look very similar at both ends...but there is a slight difference in them. I have CPP 5" rear drop springs and had the same problem. I flipped over the spring that was on the "taller" side and that solved it. It also helps to drive around for a while to help everything settle. __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man Last edited by leddzepp; 03-03-2011 at 03:02 PM.

03-03-2011, 03:01 PM	#14
67Slider Registered User Join Date: Mar 2010 Location: Pueblo West, CO Posts: 944	Re: Installed CPP rear 5" drop coils...and now I have a problem. subscribed. I had the same problem. Curious to see what the answer is. __________________ 67 C10 Stepside 66 Mustang Coupe 99 Burb 2500

03-03-2011, 03:33 PM	#15
72peace Senior Member Join Date: Jan 2011 Location: Bellevue, NE Posts: 712	Re: Installed CPP rear 5" drop coils...and now I have a problem. If you look closely at the photos you'll notice one of the three large loops are closer to the frame, on one it's closer on the top, and the other it's closer on the bottom. Just looking, it would appear one is upside down. IMHO.

03-03-2011, 05:38 PM	#16
Frkypunk70 Registered User Join Date: Mar 2010 Location: Scranton,Pa Posts: 423	Re: Installed CPP rear 5" drop coils...and now I have a problem. Looks to me that on the pic on the right the cpp logo is upside down. On my truck you can read the logos. I'm guessing thats the one that is the wrong way. __________________ "When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car. "



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