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 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 11-22-2008, 09:04 PM   #1
pilotj
Registered User
 
Join Date: May 2007
Location: Roanoke, VA
Posts: 78
I need leaf spring help

I was gonna post this in the suspension forum, but it looks like all thats talked about in there anymore is bagging and lowering. I need to know which leaves to remove for a smoother ride! My old spring pack had 8 leaves plus the thick overload and my new spring pack has 9 plus the overload. My old set had 3 broken on one side and 2 leaves broken on the other side (both main springs were broken at the center bolt hole). I only found it when I went to replace the bushings. I got a really good deal on the 9 leaf spring pack, but after a being beat to death for the past year, I can't take it any more. Two of the springs have got to go!! I still haul some wood and cars occasionally with it so I don't want to remove the wrong leaves. I just want a smoother ride. A local spring guy said the 2nd from the top and the 4th. Is that right? (he seemed kind of confused at the time). Its a '79 C20. Pic' are of the old and new set. Thanks
Attached Images
   
__________________
1979 Chevy C20 350/TH400
1974 Chevy C30 350/4speed
pilotj is offline   Reply With Quote
Old 11-23-2008, 12:44 AM   #2
Green77c10
Registered User
 
Green77c10's Avatar
 
Join Date: Apr 2008
Location: Portland, OR
Posts: 70
Re: I need leaf spring help

I called a local spring shop. they told me which ones and also told me if you invert the bottom leaf that makes a big difference as well.
Green77c10 is offline   Reply With Quote
Old 11-23-2008, 01:02 AM   #3
Square84
I don't think these pills work
 
Square84's Avatar
 
Join Date: Apr 2008
Location: burkburnett,Tx
Posts: 626
Re: I need leaf spring help

Quote:
Originally Posted by Green77c10 View Post
I called a local spring shop. they told me which ones and also told me if you invert the bottom leaf that makes a big difference as well.
what kinda difference does it make the ride softer or firmer?
__________________
SQUARE84
90 SUBURBAN
Square84 is offline   Reply With Quote
Old 11-23-2008, 01:28 PM   #4
Green77c10
Registered User
 
Green77c10's Avatar
 
Join Date: Apr 2008
Location: Portland, OR
Posts: 70
Re: I need leaf spring help

I guess which leafs you take out affects the general performance of the spring, so it might affect load carrying and the smoothness of the ride. The shop did tell me to take specific ones out to get the best results for what I was looking for. The info was free, I just told them what the springs were for and how many leafs were on it and they told me which ones, about a 5 minute phone call.
Green77c10 is offline   Reply With Quote
Old 11-23-2008, 02:04 PM   #5
Duro5341
Registered User
 
Duro5341's Avatar
 
Join Date: Dec 2006
Location: Earth
Posts: 239
Re: I need leaf spring help

Personally I would go and get the proper spring pack.....just get a 1/2 ton set with 3 and 1 overload. This will soften the ride, and you can still carry 1000lbs legally. As soon as you start modifying spring packs you are asking for a hole heep of problems. These springs are designed to work in a pack. i would start from the bottom and work your way up....leaving the overload. This is what is done in the factory spring packs....

Duro
__________________
-1986 K10 LWB, 350 HD,TH400
3.08, 30 spline 10 bolt, with an Auburn Posi, 31" tires
All original, second owner truck
-1979 Monte Carlo, 350, 200r4, 3.73 posi
-1987 GT T-top Mustang - slow moving project
Duro5341 is offline   Reply With Quote
Old 11-23-2008, 06:21 PM   #6
Pyrotechnic
Registered User
 
Pyrotechnic's Avatar
 
Join Date: Feb 2007
Location: Austin, TX
Posts: 3,930
Re: I need leaf spring help

One issue with removing leafs if that if you start out with two spring packs that are equal and you remove identical leafs on each one, your end result may not be equal. It just depends on the leaf packs. Sometimes you get lucky and they turn out equal for the most part. Sometimes you end up with your truck leaning to one side. Kind of a gamble.
__________________
1977 GMC Sierra Grande
Pyrotechnic is offline   Reply With Quote
Old 11-23-2008, 11:06 PM   #7
Square84
I don't think these pills work
 
Square84's Avatar
 
Join Date: Apr 2008
Location: burkburnett,Tx
Posts: 626
Re: I need leaf spring help

Quote:
Originally Posted by Green77c10 View Post
I guess which leafs you take out affects the general performance of the spring, so it might affect load carrying and the smoothness of the ride. The shop did tell me to take specific ones out to get the best results for what I was looking for. The info was free, I just told them what the springs were for and how many leafs were on it and they told me which ones, about a 5 minute phone call.
no sorry i mean what diff does inverting the overload make?
__________________
SQUARE84
90 SUBURBAN
Square84 is offline   Reply With Quote
Old 11-23-2008, 11:28 PM   #8
pilotj
Registered User
 
Join Date: May 2007
Location: Roanoke, VA
Posts: 78
Re: I need leaf spring help

Geen77c10, I was wondering what inverting the overload spring would do also. And you didn't say what spring leaves he told you to take out or the info he gave you. I'm asking here because I've gotten different answers from my spring shops around here. I was hopeing to find someone on this board that has removed them for the ride. I saw a post on here a while back about it but have searched for it and can't be found. Thanks to everyone for helping me out. It's a lot of work to do it it by trial and error, but it might be my best shot.
__________________
1979 Chevy C20 350/TH400
1974 Chevy C30 350/4speed
pilotj is offline   Reply With Quote
Old 11-24-2008, 11:52 PM   #9
Square84
I don't think these pills work
 
Square84's Avatar
 
Join Date: Apr 2008
Location: burkburnett,Tx
Posts: 626
Re: I need leaf spring help

so they did remove the overload and it dropped it?
__________________
SQUARE84
90 SUBURBAN
Square84 is offline   Reply With Quote
Old 11-25-2008, 01:28 PM   #10
Green77c10
Registered User
 
Green77c10's Avatar
 
Join Date: Apr 2008
Location: Portland, OR
Posts: 70
Re: I need leaf spring help

all they did was flip it over
Green77c10 is offline   Reply With Quote
Old 11-25-2008, 06:47 PM   #11
Square84
I don't think these pills work
 
Square84's Avatar
 
Join Date: Apr 2008
Location: burkburnett,Tx
Posts: 626
Re: I need leaf spring help

ok thanks
__________________
SQUARE84
90 SUBURBAN
Square84 is offline   Reply With Quote
Old 11-27-2008, 12:07 AM   #12
pilotj
Registered User
 
Join Date: May 2007
Location: Roanoke, VA
Posts: 78
Re: I need leaf spring help

Quote:
On my springs they took out the third and fifth leaf, out of the original 8.
Is that the third and fifth leaf from the top? Thanks for all the great info.
__________________
1979 Chevy C20 350/TH400
1974 Chevy C30 350/4speed
pilotj is offline   Reply With Quote
Old 11-27-2008, 09:37 PM   #13
Green77c10
Registered User
 
Green77c10's Avatar
 
Join Date: Apr 2008
Location: Portland, OR
Posts: 70
Re: I need leaf spring help

yea, from the top. no prob! hope it helps. might be a bit different on that bigger spring pack, hope it gives some idea though
Green77c10 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 07:09 PM.


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