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#1 |
Senior Member
![]() Join Date: Mar 2011
Location: West Plains, Missouri
Posts: 7,557
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67 - Rear coil spring question
I redid a friends 67 pickup a couple years ago. We installed a drop kit from CPP. We did a 5" coil spring drop in the rear, with relocators for shocks, c-notch, etc. The pickup is a 67 longbed stepside. It was orginally a 1/2 ton heavy duty long bed. We kept the long bed and added a gas tank at rear of frame. What is happening now is when you ran down the freeway at about 70 mph, the rear axle bounces like a rubber ball. It's not real bad, but you can see it if you watch from another vehicle. I'v talked with CPP and they think I should go to the 4" heavy duty drop coil spring. I think this may take care of the problem, but wanted to check with people on here who may have had this problem, or can help out, before we order the new springs. I have attached several pics, showing old springs & new, and the current underside of pickup. Let me know what you think.
Pic 1 old and new springs Pic 2-5 shots of undercarriage
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my build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=459839 Jimbo's long bed step build:http://67-72chevytrucks.com/vboard/s...t=464626<br /> Last edited by oldman3; 05-09-2011 at 01:46 PM. |
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#2 |
~Rest In Peace~
Join Date: May 2005
Location: CALIFORNIA NOR CAL
Posts: 9,707
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Re: 67 - Rear coil spring question
do you know the spring rating ?
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is it fast ? it has a lighting bolt donut? B___H please, I can remove 90% of your so called "beauty" with a kleenex |
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#3 |
Senior Member
![]() Join Date: Mar 2011
Location: West Plains, Missouri
Posts: 7,557
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Re: 67 - Rear coil spring question
Pic 1 more undercarriage.
Pic 2 How tire looks in the opening, tire is a 255/60/17 on Coy rims Pic 3 & 4 Before and after shot.
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my build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=459839 Jimbo's long bed step build:http://67-72chevytrucks.com/vboard/s...t=464626<br /> |
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#4 |
Senior Member
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Location: West Plains, Missouri
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Re: 67 - Rear coil spring question
No I'm sorry I don't, they are what CPP sold, part # was 603-5.
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my build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=459839 Jimbo's long bed step build:http://67-72chevytrucks.com/vboard/s...t=464626<br /> Last edited by oldman3; 05-09-2011 at 02:37 PM. Reason: spelling |
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#5 |
Spanked once
![]() Join Date: Oct 2006
Location: Intheshop, Indiana
Posts: 969
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Re: 67 - Rear coil spring question
My first thought would be gas adjust shocks or coil overs. Thats some slick detail right there...very nice.
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The ole 350 budget build. |
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#6 |
Senior Member
![]() Join Date: Mar 2011
Location: West Plains, Missouri
Posts: 7,557
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Re: 67 - Rear coil spring question
I had thought about coil overs also, but cost is the problem. Thanks for the kind words, appreicate it.
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my build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=459839 Jimbo's long bed step build:http://67-72chevytrucks.com/vboard/s...t=464626<br /> |
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#7 |
Registered User
Join Date: Sep 2003
Location: maine
Posts: 191
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Re: 67 - Rear coil spring question
Just a stupid thought, but are the shocks just plain old worn out?
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#8 |
Registered User
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Location: Valley of the Sunstroke, Arizona
Posts: 1,210
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Re: 67 - Rear coil spring question
Sounds to me like there isn't enough dampening with the shocks, maybe they are too weak or worn out. Has this always happened?
Out of balance or out of round tires could be a cause... I chased a problem like this once and after checking everything (and I mean everything) 2-3 times, replaced the 6 month old tires... solved. So just because they look nice and new doesn't necessarily mean they aren't a problem. Your mileage may vary...
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My build thread - Devastation and Reform http://67-72chevytrucks.com/vboard/s...d.php?t=567131 |
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#9 |
Senior Member
![]() Join Date: Mar 2011
Location: West Plains, Missouri
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Re: 67 - Rear coil spring question
Shocks are brand new Doetsch, with less that 1500 miles.
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my build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=459839 Jimbo's long bed step build:http://67-72chevytrucks.com/vboard/s...t=464626<br /> |
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#10 | |
Senior Member
![]() Join Date: Mar 2011
Location: West Plains, Missouri
Posts: 7,557
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Re: 67 - Rear coil spring question
Quote:
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my build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=459839 Jimbo's long bed step build:http://67-72chevytrucks.com/vboard/s...t=464626<br /> Last edited by oldman3; 05-09-2011 at 02:40 PM. |
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