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Old 07-06-2013, 09:25 PM   #1
frankenstien
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Default getting rid of lift blocks

ok, on my 74(ish0 3/4 ton gmc truck D44/FF14, it has a rancho 4'' lift with front springs and blocks in the rear, this winter i am going to re do my traction bars and get the blocks out, and finally (hopefully) get rid of my wheel hop, my rear springs have 2 leafs doubled, as i used to carry a water tank in it, now that i have my Duramax, i dont use it for that anymore.

would like to be a cheap a$$ on it and not just put 4'' lift springs, was thinking about using some add a leafs and take some of the other ones out anyone use the add a leafs? or have a better idea?

thanks,
mike
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Old 07-06-2013, 09:57 PM   #2
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Default Re: getting rid of lift blocks

Do a shackle flip. Not sure how the rear of that truck is set up, but if you have rear spring shackle hangers, just cut a hole and flip the shackles. Beef up the hanger if you're worried about strength. Check out my build thread for ideas if you'd like
A shackle flip typically gives you 4" of lift, and improves the pinion angle.
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Old 07-06-2013, 10:03 PM   #3
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Default Re: getting rid of lift blocks

do a shackle flip. I have some 7 " drop shackles from diy4x that I am not going to use for sale.
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Old 07-06-2013, 10:04 PM   #4
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Default Re: getting rid of lift blocks

I believe add a leafs will help out a lot too. Im a believer
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Old 07-06-2013, 10:51 PM   #5
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Default Re: getting rid of lift blocks

I'm currently doing a shackle flip with rear spring front hangers, cheap and strong
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Old 07-07-2013, 11:56 AM   #6
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Default Re: getting rid of lift blocks

ok, so its flipping the rear spring, front hanger? am i understanding that correctly?
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Old 07-07-2013, 12:43 PM   #7
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Default Re: getting rid of lift blocks

Quote:
Originally Posted by ak_petey View Post
do a shackle flip. I have some 7 " drop shackles from diy4x that I am not going to use for sale.
He only needs 4", that would be über overkill.


Frankenstein, Take a pic of your rear suspension from the side and post it, also take a close up picture of your shackle set up so we can see how it's set up. As long as your rear suspension hanger and shackle are in the back, do a flip. You'll have to remove your shackle, and then cut a hole in the bottom of the hanger big enough to fit the shackle through so it can operate correctly. Basically your spring pack and shackle will now operate from underneath the hanger instead of above it. Gives about 4" of lift and better angle for the driveshaft to the pinion.
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Last edited by Full83size; 07-07-2013 at 01:00 PM.
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Old 07-07-2013, 12:57 PM   #8
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Default Re: getting rid of lift blocks

Here's mine that I did last year, and added some way overkill bracing.







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Old 07-07-2013, 04:48 PM   #9
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Default Re: getting rid of lift blocks

Here is a picture of what I'm talking about.
Used a rear spring front hanger from another truck.

*These are only mocked up at the moment*
You don't flip the spring, you flip the shackle
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Old 07-07-2013, 04:52 PM   #10
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Default Re: getting rid of lift blocks

Quote:
Originally Posted by Full83size View Post
Here's mine that I did last year, and added some way overkill bracing.
Rob,

Is that with weight on it?
Your shackle angle looks too vertical and it doesn't appear that there is much room for the spring to flatten out before the shackle hits the hanger?
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Old 07-07-2013, 05:12 PM   #11
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Default Re: getting rid of lift blocks

ok i see what your talking about, how does that effect the rear suspension? are you able to still haul heavy stuff with the shackle under compression like that?
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Old 07-07-2013, 05:18 PM   #12
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Default Re: getting rid of lift blocks

I had a different truck that I flipped the shackle and didn't have any adverse effects. I hauled plenty and towed with it, no problems. If you set the proper shackled angle it actually rides better IMO.
I have heard people (online) say otherwise though....
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Old 07-07-2013, 05:24 PM   #13
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Default Re: getting rid of lift blocks

ok and how hard is it to set shackle angle? sounds like this is going to get fun....
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Old 07-07-2013, 05:55 PM   #14
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Default Re: getting rid of lift blocks

You set your shackle angle by moving the hanger front to back.
I'm no expert, but here is my understanding.
At full "droop" you want your shackle angle @ 90-95*
At full "stuff" you want your shackle angle as close to 0* as possible.
Ride height (fully loaded) will be somewhere in the middle. Probably somewhere between 35* and 70*
A lot depends on your springs, are they super stiff, or super soft and flexy?

Basically you should be able to set it by full "droop" and everything else should somewhat fall in line.
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Old 07-07-2013, 08:06 PM   #15
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Default Re: getting rid of lift blocks

Quote:
Originally Posted by joe231 View Post
Rob,

Is that with weight on it?
Your shackle angle looks too vertical and it doesn't appear that there is much room for the spring to flatten out before the shackle hits the hanger?
Yeah that's with the trucks weight on it, I tested it both directions many times. It has full movement.

Since I did not move the hanger at all, it is essentially exactly the same as stock except that the shackle is underneath.

Frankenstein, it is very simple. In your case you will simply be rotating the shackle upside down, keeping the stock flexibility. No it does not compromise the hauling capabilities or characteristics. It's much more simple than most people think.
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Old 07-07-2013, 08:24 PM   #16
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Default Re: getting rid of lift blocks

Joe, what truck is that? Did you get a new one?
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Old 07-07-2013, 09:14 PM   #17
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Default Re: getting rid of lift blocks

Quote:
Originally Posted by Full83size View Post
Yeah that's with the trucks weight on it, I tested it both directions many times. It has full movement.

Since I did not move the hanger at all, it is essentially exactly the same as stock except that the shackle is underneath.
Cool that's good info to know!
Thanks!

Quote:
Originally Posted by Full83size View Post
Joe, what truck is that? Did you get a new one?
It's one I have had for awhile
It was a Dooley.
My son and I are building it using parts from the rusty burb.
We are gonna shorten it and put a short wide bed on it.


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Last edited by joe231; 07-07-2013 at 09:18 PM.
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Old 07-07-2013, 09:21 PM   #18
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Default Re: getting rid of lift blocks

ok, my springs are stiff as could be theres a total of 9 in the pack right now, i will take the doubles out if i can get the correct ride height with out them
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2015 Ford Expedition EL - Wife's rig
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