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Do rear shock extenders create a pivot point?

17Sierra1500
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17Sierra1500 Enthusiast

17Sierra1500

Posted
Posted (edited)

'17 GMC Sierra 1500, installing RC 5" bracket lift.  Kit comes with RC N3 shocks, I don't plan to use them.  I have the Eibach Stage 2 kit.  Eibach rear shocks only allow for +0-1.5" of lift.

 

I know I can use rear shock extenders like this but wouldn't that create a problematic pivot point?

 

image.png.34e47a5c209367ba585a0d22fc5bce15.png

Edited by 17Sierra1500
MikeBMW Senior Enthusiast

MikeBMW

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Posted

I wouldn't do it but, that's just me.
Back in the late 70s when I had a 10" lift on my Chevy Short bed Scottsdale, I tried a spring lift with extensions on the rear leaf springs front and rear.
It wandered about dangerously.
I removed the front pivot point and had the springs arced for the lift I wanted.
YMMV but I wouldn't chance it, as I mentioned.
Any additional pivot point allows, well, an additional pivot point.

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Grumpy Bear Senior Enthusiast

Grumpy Bear

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Posted
1 hour ago, MikeBMW said:

I wouldn't do it but, that's just me.
Back in the late 70s when I had a 10" lift on my Chevy Short bed Scottsdale, I tried a spring lift with extensions on the rear leaf springs front and rear.
It wandered about dangerously.
I removed the front pivot point and had the springs arced for the lift I wanted.
YMMV but I wouldn't chance it, as I mentioned.
Any additional pivot point allows, well, an additional pivot point.

 

I see what you are saying and would agree in an instant IF both planes of the fasteners were the same. But as the picture shows, the cross plane cancels the addition to nothing more than what was there to begin with. Does that make sense? 

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MikeBMW Senior Enthusiast

MikeBMW

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Posted
6 minutes ago, Grumpy Bear said:

 

I see what you are saying and would agree in an instant IF both planes of the fasteners were the same. But as the picture shows, the cross plane cancels the addition to nothing more than what was there to begin with. Does that make sense? 

If a shock, or a spring, moves in more than one direction, it will cause stability issues.

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Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted (edited)
11 hours ago, MikeBMW said:

If a shock, or a spring, moves in more than one direction, it will cause stability issues.

 

 

Okay, didn't see that like that but on closer look. Yea, I see your point. I'd tack weld that lower mount to the bracket. That would end that noise. 

 

Know what else is a stinker? A shock not in mid stroke. Running a stock length shock with a lift or lower is just that. 

 

Now, having said that, the factory setup on a pickup is always biased to the extension when unloaded. On right when fully loaded. When I did Pepper, I lowered the back to be in mid stroke and never carry more than 500 in the box....ever. Just like a car. 

 

Edited by Grumpy Bear
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  • 3 weeks later...
17Sierra1500 Enthusiast

17Sierra1500

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Posted (edited)

Thanks for the replies!  I ended up buying a RC "Denali / Magnaride" rear shock kit 188BOX9.  It was designed to be used on as 5" lift with the OEM rear magnaride shocks.  Luckily, this kit has shock extensions with an additional anchor point, as to not allow the extension bracket to pivot.  Working good.  

Edited by 17Sierra1500
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