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 10-09-2018, 03:50 PM   #1
Arctic c20 -72
Registered User
 
Join Date: Sep 2018
Location: sweden
Posts: 9
softer ride c20 -72 leaf springs

Would it give me a softer ride if I remove the bottom leaf?
Attached Images
  
Arctic c20 -72 is offline   Reply With Quote
Old 10-09-2018, 03:51 PM   #2
demian5
Registered User
 
demian5's Avatar
 
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 1,548
Re: softer ride c20 -72 leaf springs

Put a small block with a 400 bolted to it in the bed.
__________________
"Work hard, use your vacation days."
1970 C15 GMC Long Bed
1986 C20 Scottsdale (grandpa truck)
1964 Impala SS
1959 Austin Healey 100-6 BN6
Instagram: C10sofOC
demian5 is offline   Reply With Quote
Old 10-09-2018, 03:59 PM   #3
Arctic c20 -72
Registered User
 
Join Date: Sep 2018
Location: sweden
Posts: 9
Re: softer ride c20 -72 leaf springs

... or a VW Beetle?
Arctic c20 -72 is offline   Reply With Quote
Old 10-09-2018, 04:25 PM   #4
sick472
Registered User
 
sick472's Avatar
 
Join Date: Jul 2015
Location: Sedalia Mo.
Posts: 219
Re: softer ride c20 -72 leaf springs

If you are talking about the thick one that barely touches the others...don't do that!

Let's talk hypothetically, I am not qualified to advise anyone on modifying there suspension components. I can just talk theory at this point.

That lower thick leaf looks to be a back up for heavily loaded situations or big potholes. Removing it would not be noticeable wrt the ride until you needed it and it would not be there. That lower thick one also keeps your other springs from bending backwards (or downwards).

That leaves the next leaf up, it's a shorter one compared to the other 4 leaves above it which tells me that it contributes to a bit less than 20% of the support (maybe as little as 10%). I believe your ride would get softer if you removed that one from both sides. You would also loose some ride height (IDK how much, certainly the thickness of the spring and then some more for the loss of support). The scary part is that removing any of the springs also reduces the support that the springs above would have which sounds dangerous to me, maybe life threatening.

I would leave the spring designs/mods to the spring engineers!
__________________
He who is without oil shall throw the first rod. Compressions 8.7:1
sick472 is offline   Reply With Quote
Old 10-09-2018, 06:32 PM   #5
Red71gmc
Active Member
 
Join Date: Jan 2017
Location: Brookston, In
Posts: 116
Re: softer ride c20 -72 leaf springs

I believe the correct way would be to leave the base spring and remove every other spring after it till what you want. One or two would make a lot of difference on ride but of course at the cost of payload capacity. If never used as a 3/4 ton for payload it would not make a lot of difference for you.
Red71gmc is offline   Reply With Quote
Old 10-09-2018, 06:54 PM   #6
Stocker
20' Daredevil (Ret)
 
Stocker's Avatar
 
Join Date: May 2003
Location: Jefferson State
Posts: 10,611
Re: softer ride c20 -72 leaf springs

Quote:
Originally Posted by Red71gmc View Post
I believe the correct way would be to leave the base spring and remove every other spring after it till what you want. One or two would make a lot of difference on ride but of course at the cost of payload capacity. If never used as a 3/4 ton for payload it would not make a lot of difference for you.
Another suggestion following that line of thinking would be to look closely at leaf springs for half-ton trucks and copy them as closely as possible. Or just try to source a pair of half-ton leafs and swap them in.
__________________
- Mike -

1972 K20 LWB 350/350/205

RIP El Jay
Stocker is offline   Reply With Quote
Old 10-09-2018, 08:21 PM   #7
Mike C
Registered User
 
Mike C's Avatar
 
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 6,728
Re: softer ride c20 -72 leaf springs

If you don't run the truck loaded, tailor the ride with air pressure. If you have load range D tires that specify 65 psi, try running them at 45. Even on my Duramax with it's load range E tires that spec 80 psi, I only run them at that level if I am loaded or pulling HEAVY.
__________________
44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
Mike C is offline   Reply With Quote
Old 10-09-2018, 08:55 PM   #8
Steeveedee
Senior Member
 
Steeveedee's Avatar
 
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 2,256
Re: softer ride c20 -72 leaf springs

If you want a little more softness in the ride, raise the truck up by the frame and spray a dry Teflon(R) lube in between the leaves. Interleaf friction is a real thing. If you look at really big truck, you won't even see shocks, because interleaf spring friction reduces the bounce that much.
__________________
'70 Chevy 3/4T Longhorn CST 400/400/3.54 Custom Camper

"Orange Acres"
Steeveedee is offline   Reply With Quote
Old 10-10-2018, 12:22 AM   #9
71threequarterton
Registered User
 
71threequarterton's Avatar
 
Join Date: Aug 2016
Location: Coast
Posts: 147
Re: softer ride c20 -72 leaf springs

Quote:
Originally Posted by Steeveedee View Post
If you want a little more softness in the ride, raise the truck up by the frame and spray a dry Teflon(R) lube in between the leaves. Interleaf friction is a real thing. If you look at really big truck, you won't even see shocks, because interleaf spring friction reduces the bounce that much.
Just curious: how often would you do this?
__________________
I bought it for luxury and gas mileage.

71 Chevrolet C20
94 GMC Yukon 4x4 w/ upgrades
71threequarterton is offline   Reply With Quote
Old 10-10-2018, 08:56 AM   #10
72c20customcamper
Registered User
 
72c20customcamper's Avatar
 
Join Date: Jul 2018
Location: Napanoch new york
Posts: 185
Re: softer ride c20 -72 leaf springs

If you don't plan on loading up your truck with gravel or firewood the overload spring can be removed. Been done thousands of times on trucks. But it does serve another purpose, helps prevent wheel hop or axle wrap .So if your running a strong engine and or towing you may experience it.

I removed the overload and one leaf. Much softer ride. But I am going with a set of lowering springs and drop spindles this winter . Truck needs another 2 inches at least.
__________________
Mark
72 c20 custom camper,66 SS396 Chevelle
1964 Hawk, 63 Avanti,62 lark
1969 AMX ,02 Springer. 03 anniversary Fatboy.
81 Honda automatic 1600 miles
2015 Honda Goldwing my favorite bike
72c20customcamper is offline   Reply With Quote
Old 10-10-2018, 03:53 PM   #11
toolboxchev
Registered User
 
Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 1,528
Re: softer ride c20 -72 leaf springs

Just get a 1/2 ton with a coil spring rear end and go waddling down the road!
toolboxchev is offline   Reply With Quote
Old 10-10-2018, 09:15 PM   #12
Mike C
Registered User
 
Mike C's Avatar
 
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 6,728
Re: softer ride c20 -72 leaf springs

Sourcing parts in Sweden just a LITTLE more complicated and expensive than getting parts in the US...

Tires are the easiest. Google about setting correct tire pressure based on load, the chalk method specifically. I run the 33 12.5 15's on my CJ-5 at 20 psi on the road. The 35 12.5 16.5 BFG AT's on my Jimmy are set at 26 and could probably go a little lower.
__________________
44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
Mike C is offline   Reply With Quote
Old 10-11-2018, 03:40 PM   #13
Steeveedee
Senior Member
 
Steeveedee's Avatar
 
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 2,256
Re: softer ride c20 -72 leaf springs

Quote:
Originally Posted by 71threequarterton View Post
Just curious: how often would you do this?
There is nothing in the maintenance manuals about this for our trucks. Back in the day ('50s), kerosene was used. But that can collect dust, so I use a dry lube. I think that it was when lubing the rest of the vehicle, at oil change time. On my '56 Chevy wagon I pulled the springs apart and put in thin Teflon spacers to soften the ride. If you look at really big trucks, they don't even have shocks, because inter-leaf friction on those heavy duty springs provides the damping.
__________________
'70 Chevy 3/4T Longhorn CST 400/400/3.54 Custom Camper

"Orange Acres"

Last edited by Steeveedee; 10-11-2018 at 03:45 PM.
Steeveedee is offline   Reply With Quote
Old 10-14-2018, 02:37 AM   #14
Arctic c20 -72
Registered User
 
Join Date: Sep 2018
Location: sweden
Posts: 9
Re: softer ride c20 -72 leaf springs

Might try that! I never put anything really heavy on the bed1
Arctic c20 -72 is offline   Reply With Quote
Old 10-14-2018, 02:40 AM   #15
Arctic c20 -72
Registered User
 
Join Date: Sep 2018
Location: sweden
Posts: 9
Re: softer ride c20 -72 leaf springs

Yes! I've thought about that too. Will figure out if I can compare them - perhaps at LMC-truck webpage
Arctic c20 -72 is offline   Reply With Quote
Old 10-14-2018, 02:43 AM   #16
Arctic c20 -72
Registered User
 
Join Date: Sep 2018
Location: sweden
Posts: 9
Re: softer ride c20 -72 leaf springs

Engine is orinal 400 - 173 hp. How much did it drop in height? My rear could "afford" 1 inch or 1 1/2 lower without loosing stance
Arctic c20 -72 is offline   Reply With Quote
Old 10-14-2018, 02:45 AM   #17
Arctic c20 -72
Registered User
 
Join Date: Sep 2018
Location: sweden
Posts: 9
Re: softer ride c20 -72 leaf springs

That's on option I guess!
Arctic c20 -72 is offline   Reply With Quote
Old 10-14-2018, 02:47 AM   #18
Arctic c20 -72
Registered User
 
Join Date: Sep 2018
Location: sweden
Posts: 9
Re: softer ride c20 -72 leaf springs

Quote:
Originally Posted by Steeveedee View Post
If you want a little more softness in the ride, raise the truck up by the frame and spray a dry Teflon(R) lube in between the leaves. Interleaf friction is a real thing. If you look at really big truck, you won't even see shocks, because interleaf spring friction reduces the bounce that much.
Thats definitely one thing I'll do!!
Arctic c20 -72 is offline   Reply With Quote
Old 10-14-2018, 02:55 AM   #19
Arctic c20 -72
Registered User
 
Join Date: Sep 2018
Location: sweden
Posts: 9
Re: softer ride c20 -72 leaf springs

Quote:
Originally Posted by Mike C View Post
Sourcing parts in Sweden just a LITTLE more complicated and expensive than getting parts in the US...

Tires are the easiest. Google about setting correct tire pressure based on load, the chalk method specifically. I run the 33 12.5 15's on my CJ-5 at 20 psi on the road. The 35 12.5 16.5 BFG AT's on my Jimmy are set at 26 and could probably go a little lower.
Correct - we pay a lot for shipping and customs!
Reading all the experienced advise I'll definitely will put lube between the leafs.Might also try to remove leafs and see what happens. Probably would a new set of softer springs be the best idea. The ones I have are "heavy duty". There should be a softer set for C10 - but C10 has coil springs. But there should be softer c20 leaf springs available??
Great Forum !!

Last edited by Arctic c20 -72; 10-14-2018 at 03:01 AM.
Arctic c20 -72 is offline   Reply With Quote
Old 10-14-2018, 09:13 AM   #20
Andy4639
Orignal Goof member
 
Andy4639's Avatar
 
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 16,629
Talking Re: softer ride c20 -72 leaf springs

My C 20 ramp truck is way to harsh of a ride when empty. I've been thinking about taking the leafs off altogether and bagging it.

It has like 15 leafs in each side. Those coil spring shocks are not doing a thing for it either.

This winter I hope to change some of that.
Attached Images
     
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
Seeing the USA in a 71


Upstate SC GM Truck Club
2013,14 and 2016 Hot Rod Pour Tour


http://upstategmtrucks.com/



Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
Andy4639 is offline   Reply With Quote
Old 10-14-2018, 10:22 AM   #21
Arctic c20 -72
Registered User
 
Join Date: Sep 2018
Location: sweden
Posts: 9
Re: softer ride c20 -72 leaf springs

Quote:
Originally Posted by Andy4639 View Post
My C 20 ramp truck is way to harsh of a ride when empty. I've been thinking about taking the leafs off altogether and bagging it.

It has like 15 leafs in each side. Those coil spring shocks are not doing a thing for it either.

This winter I hope to change some of that.
I guess air is the best!!
Arctic c20 -72 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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 02:08 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com