The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 03-31-2014, 11:24 PM   #1
RustyBucket
Registered User
 
RustyBucket's Avatar
 
Join Date: Jul 2009
Location: Space Coast, Fl.
Posts: 1,050
Bouncy ride

Recently installed CPP springs, shocks, relocator, adj. track bar on my '71 GMC. 4" drop springs are really soft(GOOD) but it drives like it has NO shocks. SCARY BOUNCY at highway speed on I-95. Shocks are CPP-4095G. Any recommendation on better shocks? Thanks in advance.
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!!
RustyBucket is offline   Reply With Quote
Old 04-01-2014, 06:50 AM   #2
19GM71
Registered User
 
19GM71's Avatar
 
Join Date: Jan 2014
Location: Stigler,OK
Posts: 125
Re: Bouncy ride

This exact same thing happened to me with the CPP spring lowering kit.

I had installed the shocks with the body of the shocks up and the chrome shaft in the down position. Apparently this is not the right way for them to be positioned! I flipped them over and bingo, no more bounce!

If you look at all of the suspension pictures on CPP's website or catalog they have the shocks facing body down.

Hope this helps.
19GM71 is offline   Reply With Quote
Old 04-01-2014, 09:34 AM   #3
RustyBucket
Registered User
 
RustyBucket's Avatar
 
Join Date: Jul 2009
Location: Space Coast, Fl.
Posts: 1,050
Re: Bouncy ride

THANKS 19GM71, that's GREAT INFO! I'll turn 'em over this morning. This past weekend I drove up to the Spring Show at Daytona 4 days in a row, about an 80mi. round trip. Nice cruise w/ the 700r & 3.08 gear running 75mph but I-95 construction makes for a lot of BIG bumps. A couple of times the truck would hop kinda sideways, a little scary 'specially the day it rained.
Your red '71 is a VERY PRETTY TRUCK!... might look better if it had a couple more headlights I looked at all your posts. Did you change your rear gear to 3.73's? On your shifter linkage can you manually hold your trans. in first gear. I didn't install mine and can't hold it in the lower gears with the shifter. Don't know if it's a linkage adjustment or if the stock rod is too short.
Thanks again for the shock info, It'll be great to fix it and NOT have to buy more shocks.
__________________
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!!
RustyBucket is offline   Reply With Quote
Old 04-01-2014, 11:16 PM   #4
19GM71
Registered User
 
19GM71's Avatar
 
Join Date: Jan 2014
Location: Stigler,OK
Posts: 125
Re: Bouncy ride

Thanks RustyBucket, I appreciate the comments. I will agree about the 4 eyes thing! I have not changed out the rear gear yet, although I sure want to. Mine too cruises about 70 MPH, overdrive, and 1650 RPM. Its very easy to run 80 or 85 before you realize it. I would like the RPM's to be about 1900 or so at 70 in overdrive.

I am running stock shift linkages with a modified tilt column from a van. And yes I can hold it in low gear manually. It took a few adjustments at the adjusting nut on the end of the column. I did add the 4 speed indicator to the column. The indicator does not exactly match the gear that is selected, but I can manually shift into all of the gears. Maybe try adjusting your linkage.

Be sure and let me know how the shock flip turned out.
19GM71 is offline   Reply With Quote
Old 04-02-2014, 04:01 PM   #5
RustyBucket
Registered User
 
RustyBucket's Avatar
 
Join Date: Jul 2009
Location: Space Coast, Fl.
Posts: 1,050
Re: Bouncy ride

THANKS 19GM71, BIG IMPROVEMENT!!. Drives like it has shock absorbers on the rear now. When I installed them I used a picture from somebodys build thread for a reference. Guess they're bouncin' down the road out there somewhere. I was so inspired I took my front springs out and cut 1 coil off. Think I'm happy with the stance.. FINALLY. Only a moderate P.I.T.A.
__________________
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!!
RustyBucket is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:39 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com