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Author Topic: V20 rear leaf springs  (Read 4578 times)

Offline Swampyankee74

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V20 rear leaf springs
« on: August 04, 2022, 02:04:43 pm »
I recently purchased a 1987 V20. While working on it I noticed the rear leaf springs had 4+1 leafs. The vin number says its a v20, the breaks and drive train all match a v20. Did someone swap the rear leaf springs out with a half ton pickup?
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Offline Shifty

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Re: V20 rear leaf springs
« Reply #1 on: August 04, 2022, 03:19:50 pm »
I've got a good 1.38 million things going on, but I'll try to peek at mine tonight...
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87 V20 Standard Cab Longbed (current)

87 R30 3+3 Longbed (days of yore)

98 C2500 ext cab longbed

Offline Swampyankee74

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Re: V20 rear leaf springs
« Reply #2 on: August 04, 2022, 03:52:36 pm »
Sounds good, thank you
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Offline VileZambonie

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Re: V20 rear leaf springs
« Reply #3 on: August 04, 2022, 07:20:06 pm »
My 1980 C10 had twice the amount of leaves of my K20. You have to figure out what you want in terms of height and spring rate.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Swampyankee74

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Re: V20 rear leaf springs
« Reply #4 on: August 04, 2022, 07:59:13 pm »
The truck is stock height. No lift. And I intend to keep it stock. I just didn't know if somebody had taken the stock Springs out of it and put these in for a smoother ride.. Because like you said my 1974 C15 has doubled the amount of leaves as the v20. Made me think somebody might have altered it at 1 point in time. But you're saying you think that is the stock amount of leafs?
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Offline Shifty

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Re: V20 rear leaf springs
« Reply #5 on: August 05, 2022, 09:12:40 am »
My 87 V20 has 7 + 1!  No wonder it rides like a giggered tank....
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87 V20 Standard Cab Longbed (current)

87 R30 3+3 Longbed (days of yore)

98 C2500 ext cab longbed

Offline Swampyankee74

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Re: V20 rear leaf springs
« Reply #6 on: August 05, 2022, 02:36:38 pm »
That sounds to me like the right number of leafs. Which makes me beleave someone at some point swapped these springs out with a 1/2 ton. The rest of the truck including Vin matches  what a v20 is supposed to be. Thank you for taking a peek at yours for me shifty!
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Offline Swampyankee74

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Re: V20 rear leaf springs
« Reply #7 on: August 05, 2022, 02:45:55 pm »
Just took a peek at my 74 c15 it is a short bed stepside and it has 7+1. It is bone stock unmolested.  But was ordered with heavy duty springs and clutch. Doesn't make sense to me the 3/4 ton has less leafs.
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Offline Swampyankee74

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Re: V20 rear leaf springs
« Reply #8 on: August 05, 2022, 06:06:01 pm »
I guess if your v20 has 7 leafs, and my half ton has more springs someone swapped the leafsprings out with a lighter truck.  I got porked. Lesson learned
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Offline csdineley

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Re: V20 rear leaf springs
« Reply #9 on: August 05, 2022, 06:51:52 pm »
My 87 has 56" 7+1 on the Back and 4+1 on the front.
« Last Edit: August 05, 2022, 07:00:01 pm by csdineley »
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1987 V20 Custom Deluxe, Vortec Headed 350, SM465,Np205 14Bff 4.10

Offline VileZambonie

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Re: V20 rear leaf springs
« Reply #10 on: August 05, 2022, 07:10:33 pm »
Unless your SPID label is in place and shows the suspension options you are solely basing what it came equipped with on assumptions.
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,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Swampyankee74

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Re: V20 rear leaf springs
« Reply #11 on: August 06, 2022, 06:31:58 am »
That is true. I'll take a peek at it
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Offline Swampyankee74

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Re: V20 rear leaf springs
« Reply #12 on: August 06, 2022, 07:27:07 am »
Just decoded the rpo codes on the spid. The truck is a 6600 pund gvrw. A lot lower then I would have expected.
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