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#1 |
Registered User
![]() Join Date: Apr 2020
Location: Prairie, MS
Posts: 12
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Leaf Spring Drop
I have a 70 GMC with leaf spring rear and the PO did a flip kit and ended up dropping it 8" to where the frame sits on the axle. He put 3" drop springs in the front. I love the way the front sits but plan to do spindles and disc brakes in the future. What is my best option for a 5" from stock drop on the rear? Unflip the axle and do 5" drop springs? Keep the flip and somehow raise it 3"? Also is a c-notch required with either option? Maybe there's a better way to go about it too. I'm new to the leaf spring rear setup and there doesn't seem to be a lot of info out there on them.
Last edited by salty388; 04-21-2020 at 11:22 PM. |
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#2 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,717
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Re: 2.25" Leaf Spring Drop
Your only real option is go back spring under with drop leaves to get anything more than 1.5" drop using shackle or 7"+ drop of the flip. The flip on my short step resulted in a 7" drop and I run it without a notch.
I would buy a 5" rear drop spring and a set of lowering shackles to fine tune the final ride height. That 3" drop spring might be just a touch too much combined with spindles. I run a 2" spring with the spindles on mine.
__________________
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 |
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#3 | |
Senior Member
![]() Join Date: Aug 2018
Location: Western Colorado
Posts: 1,165
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Re: 2.25" Leaf Spring Drop
Quote:
I installed 4" drop springs from Western Chassis on mine and got a little over 3" of drop out of them. I'm assuming this is because the stock springs had sagged over time. If you want to get to to 5", I would start with 4" or 5" drop springs and then do shackles if the springs don't get you low enough. Be aware that shackles might require notching of a bed cross sill for clearance.
__________________
1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#4 |
Registered User
![]() Join Date: Apr 2020
Location: Prairie, MS
Posts: 12
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Re: 2.25" Leaf Spring Drop
Ok I plan to order either Western Chassis 4" or CPP 5" leafs(whichever I can get in a timely fashion) and drop shackles. Anybody know where I can get factory hardware for the "unflip"?
As far as the front I was planning to go to a 1" drop spring and 2" modular spindles from CPP for a 3/5 drop. Thanks for the help so far! I just bought this truck and am still learning a lot about it. |
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#5 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,717
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Re: 2.25" Leaf Spring Drop
Yes, I meant spring over.
__________________
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 |
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#6 | |
Senior Member
![]() Join Date: Aug 2018
Location: Western Colorado
Posts: 1,165
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Re: 2.25" Leaf Spring Drop
Quote:
And if you cut the perches off your axle: https://www.performanceonline.com/19...ar-Axle-Seats/ I don't know where to get the plates that the u-bolts run through. Maybe a junkyard or look in the classifieds here.
__________________
1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#7 | |
Registered User
Join Date: Feb 2019
Location: Navarre, Florida
Posts: 199
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Re: 2.25" Leaf Spring Drop
Quote:
Works fine. Half the price for new parts. |
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