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Old 03-27-2015, 03:27 PM   #1
frankenstien
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Default need some shock help....

So I finally got around to pulling my 4" blocks on my 1974 GMC with 3/4ton axles, I installed a set of Off road Design shackle flip brackets, I also have 2 or 3 leafs doubled in the spring stack for carrying water.

I got rid of the blocks to hopefully help with wheel hop under hard go pedal, I'm sure lift springs would have been the better choice, but have a bit of budget.

This may not be new it.may just be something I finally noticed

I had pulled the shock off the axle to life the rear to set it on the springs with new brackets, I noticed all I had to compress the shock to get it in the bracket was about 1-1.5" that seems like its too short to me, the rear does sit higher than the front, but I'm thinking I need to.bump up to a longer shock, it has pro comps on it now, for a 2.5-4" lift is what I found according to the part number, the next one jumps up to a 5-7" lift

Just wanted to see if anyone had any idea or is this normal? Like I said seems a bit short to me
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Old 03-27-2015, 06:21 PM   #2
kbeefy
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Default Re: need some shock help....

have you tried seeing how far the axle will droop without the shock?

That does sound pretty short.
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Old 03-27-2015, 06:47 PM   #3
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Default Re: need some shock help....

Yes i did, it picks up the rear end pretty quick, vs when the shocks are hanging I have a few more inches
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Old 03-29-2015, 11:27 PM   #4
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Default Re: need some shock help....

Sounds like they're short. general rule of thumb, ride height shock length should be mid travel.
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Old 03-30-2015, 01:27 AM   #5
frankenstien
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Default Re: need some shock help....

thanks, got my springs clamped to the axle to night with new U bolts, when the suspension is hanging and the tires are off the ground the shock is about 2''shy of the bracket at full extension, ordered me up some new shocks tonight,

thanks for the help
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450+HP 383

2005 GMC 2500HD Duramax Diesel- 452hp/962tq on P3's dyno

2015 Ford Expedition EL - Wife's rig
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Old 03-30-2015, 09:48 PM   #6
kbeefy
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Default Re: need some shock help....

If your 2" short get at least 2" too long and bump stop to prevent bottoming. Your shocks are inboard of the axle, right?
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'00 F350 7.3, Really big trailer
'86 VW Syncro Vanagon, 2.5l subbie transplant
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Old 03-31-2015, 01:43 AM   #7
frankenstien
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Default Re: need some shock help....

the shocks run from outside the frame to inside the leaf spring on the axle, the shocks i ordered are 3'' longer
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1974 3/4 ton gmc
450+HP 383

2005 GMC 2500HD Duramax Diesel- 452hp/962tq on P3's dyno

2015 Ford Expedition EL - Wife's rig
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