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Old 04-26-2016, 06:38 PM   #1
Jaysonb
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Rear axle flip question

The previous owner of my truck flipped the rear axle, and put a small homemade c notch in the frame. He said that he also removed a few leafs from the springs, and put a 3" lowering block in. The rear still sits a little high. Somthing don't seem right, if there was no notch, there would be 3" to the bottom of the frame, with a flip, and a 3" block. I'm not real keen about the blocks in the rear, but I still need to go lower by about 1" to take a little of the rake out. There are still 4 full length leaves in the spring packs. I have some shackles that will lower 1 or 2 inches, but it should already be plenty low with a axle flip, and 3" blocks ,right?
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Old 04-26-2016, 06:42 PM   #2
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Re: Rear axle flip question

Also, the c notch the guy put in is a half of a 5" pipe on each side, it is about a 1/4" thick, and is welded in good, is this good enough?
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Old 04-26-2016, 09:59 PM   #3
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Re: Rear axle flip question

What does it look like from a full side view?
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Old 04-26-2016, 11:25 PM   #4
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Re: Rear axle flip question

This is how the truck sat before I pulled it apart. Not the best pic, but the best one I have on me. I think about another inch lower in the rear would be about right. It seems that guys get that much drop with just a axle flip, maybe my truck has some super duty rear leafs?
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Old 04-27-2016, 01:41 AM   #5
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Re: Rear axle flip question

What do the rear spring shackles look like? You should have that drop without the blocks I think ? I just took out a 2.5" lift block and 1 shortest spring out of a 9 leaf pack(one side was broken) . Left the overloads in and flipped axle I didn't get c notch in yet but I have 1.5" to frame with bump stop removed I got just over 8" drop taking out the blocks and a flip
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Old 04-27-2016, 01:44 AM   #6
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Re: Rear axle flip question

I don't like flip brackets, I use a stock style perch welded with holes drilled right where I like the axle sitting
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Old 04-27-2016, 08:43 AM   #7
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Re: Rear axle flip question

Those can't be the stock springs, my springs are currently unloaded and they don't have half the arch you have in yours. The C notch is good.
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Old 04-27-2016, 10:14 AM   #8
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Re: Rear axle flip question

Here is the best pic I have of the shackles at the moment. I'm not sure why the pictures load sideways from my phone, sorry.
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Old 04-27-2016, 10:22 AM   #9
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Re: Rear axle flip question

Quote:
Originally Posted by Chuck Burg View Post
Those can't be the stock springs, my springs are currently unloaded and they don't have half the arch you have in yours. The C notch is good.
^^ X2. The shackles look stock
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Old 04-27-2016, 09:29 PM   #10
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Re: Rear axle flip question

I have 4.5" between frame and axle tube. No weight on chassis, no blocks, and heavy duty 5 leaf springs with one leaf remove to be more like standard springs.
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Old 04-27-2016, 11:35 PM   #11
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Re: Rear axle flip question

I see you guys have 52" and mine is 56". But that shouldn't make a ride height difference just spring rate ? Mine are original springs as well. I've had similar results with same setup on 2 other trucks . I'll Post a pic tomorrow when I get home
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Old 04-27-2016, 11:41 PM   #12
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Re: Rear axle flip question

Quote:
Originally Posted by 65standard View Post
I have 4.5" between frame and axle tube. No weight on chassis, no blocks, and heavy duty 5 leaf springs with one leaf remove to be more like standard springs.
Your guys trucks do look similar. I guess that's why they say trucks do end up different some times. HD should have 8 and overload? Like big ten/ heavy half
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Last edited by Gmc.guy; 04-27-2016 at 11:47 PM. Reason: Auto correct junk
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Old 04-28-2016, 09:09 AM   #13
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Re: Rear axle flip question

The 1/2 ton heavy duty springs have bigger eyelet bushings and 5 leafs.
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Old 04-28-2016, 01:10 PM   #14
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Re: Rear axle flip question

Quote:
Originally Posted by Gmc.guy View Post
Your guys trucks do look similar. I guess that's why they say trucks do end up different some times. HD should have 8 and overload? Like big ten/ heavy half
Correct.
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Old 04-28-2016, 02:36 PM   #15
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Re: Rear axle flip question

I'm not sure if the blocks bother me enough to buy new springs right now. I have to fork out another big wad of cash to buy the small stuff to finish this truck up. For the time being, I will throw the new shackles in and see how it looks, and then add new rear springs to the "stuff to replace after the truck is done" list. Thanks guys!
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