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73-87 Chevy _ GMC Trucks => Brakes, Frame, Steering & Suspension => Topic started by: teamcurtis on April 03, 2019, 12:45:21 pm

Title: Rear Leaf Springs
Post by: teamcurtis on April 03, 2019, 12:45:21 pm
I dropped the front end of my truck 2" and Im pleased with the way it sits.
The rear end now needs to be dropped about the same.

Currently the truck has 7 leaf 56" springs, with a 4 hole shackle. The spring is mounted on the top hole (closest to the bed, furthest from the wheel).
Suggestions on where to start? Id like as smooth of a ride as possible and cant imagine I will use this truck as an actual truck, but i might tow a 3,500 lb travel trailer very short distances.

-Would i be better off with a 3 leaf 52", I think that was stock, but would that raise or lower the truck from its current state?
Title: Re: Rear Leaf Springs
Post by: VileZambonie on April 03, 2019, 04:24:52 pm
So you used drop shackles but kept stock hangers? Just use drop hangers.
Title: Re: Rear Leaf Springs
Post by: teamcurtis on April 15, 2019, 05:58:37 pm
well I didn't do any of this. The truck was like this when I got it.
But yes, drop shackles and stock hangers.

I also thought a lighter spring might make it ride nicer too.
Title: Re: Rear Leaf Springs
Post by: 75gmck25 on April 16, 2019, 06:02:30 am
A 56" 7 leaf spring sounds like something from a 1 ton.  The lighter duty trucks used a 52" spring.

I have OEM 52" 7 leaf springs rated at 2775 lbs/spring and its a rough ride in my K25.   In '75 they had suspension as light as about 1875 lb /spring load rating, which should ride better.  However, I don't think they were designed to make it ride any lower.

Bruce
Title: Re: Rear Leaf Springs
Post by: Jerr-conn on April 16, 2019, 07:02:28 am
On my 87 r10 I have 56" springs. I removed the thick bottom leaf and the next 2. Dropped it
About 3". Got 2" more with 2" shackles. Remove the large bottom one and the next one.
Should be close and won't cost nothing but labor.   Let us know.
Title: Re: Rear Leaf Springs
Post by: teamcurtis on April 19, 2019, 07:31:46 pm
I like the idea of low/no cost....
Title: Re: Rear Leaf Springs
Post by: teamcurtis on April 19, 2019, 11:10:37 pm
Bottom meaning closest to the ground or bottom closest to the truck?

They seem to have some sort of split in holding in every 2 ... tips fro removing?
Title: Re: Rear Leaf Springs
Post by: Jerr-conn on May 06, 2019, 05:42:27 pm
There is only 1 thick leaf per side, which is closest to ground. About 3/4" thick.