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Clunk/thud while accelerating/slowing down

nadrojcote

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Wade Leveille Enthusiast

Wade Leveille

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gmt900 owners didn't have any long term complaints that I know of. If anything I would say it should make your leafs last longer because they aren't flexing as much

Not sure of the long term thing. The only thing I could think of is now what ever flex HAS to occur is happening on a shorter beam. Take a 4ft rod and deflect it 6" to one side at the top.. Now take a 1ft rod and try the same... Stiffer. Just my 2cents.. But If I find the "Clunk" I still may try it....

sugarjohnson Enthusiast

sugarjohnson

Posted
Posted

Going to try this over the weekend. Di you guys need to grab washers with the autozone kit too, or is that all you need?

I got mine at Oreily and they included lock washers.
nadrojcote Senior Enthusiast

nadrojcote

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I showed this to fondupot before, but I dont think I posted it. This is a good video to demonstrate whats causing the clunk, it shows the yoke popping in and out with axle wrap. It is an extreme case, but perfect for giving an idea of whats going on.

 

 

Wade Leveille Enthusiast

Wade Leveille

Posted
Posted

This Yoke Popping is severely multiplied by lift kit. The lift creates this large moment arm which is overstressing the springs, and allowing for rotation of the axle. As you say, it's an extreme case, but explainable at least here.

nadrojcote Senior Enthusiast

nadrojcote

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This Yoke Popping is severely multiplied by lift kit. The lift creates this large moment arm which is overstressing the springs, and allowing for rotation of the axle. As you say, it's an extreme case, but explainable at least here.

 

 

The sad fact is that if you look at how many leafs he has and they're clamped, ours flex probably about the same amount because we only have two leafs with no clamps.

Skeeter McSkeet Senior Enthusiast

Skeeter McSkeet

Posted
Posted

Going to try and get this done tonight or in the morning. Did you all have to take the wheels off to install? I could feel it clunk/thud this morning when I was just starting to roll pull out of our road and had to slam on the brakes bc a car came flying around the curve. It was very exaggerated in this situation.

 

 

-Skeet

nadrojcote Senior Enthusiast

nadrojcote

Posted
  • Author
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Going to try and get this done tonight or in the morning. Did you all have to take the wheels off to install? I could feel it clunk/thud this morning when I was just starting to roll pull out of our road and had to slam on the brakes bc a car came flying around the curve. It was very exaggerated in this situation.

 

 

-Skeet

 

 

You could probably do it without taking the wheels off, but it will make it a lot easier and probably save time to take them off.

stevev Enthusiast

stevev

Posted
Posted

installing them with the wheels on and the truck on the ground means there's some weight on the springs, right? So you can make it tighter with the clamps?

 

I'm heading to Autozone tonight to buy some...

nadrojcote Senior Enthusiast

nadrojcote

Posted
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installing them with the wheels on and the truck on the ground means there's some weight on the springs, right? So you can make it tighter with the clamps?

 

I'm heading to Autozone tonight to buy some...

 

Yup correct, I just found it hard to get a good sized wrench/ratchet in there with the wheels on, I originally tried to install mine without removing the wheels and said to hell with this they're coming off.

chevy2tuff2006 Enthusiast

chevy2tuff2006

Posted
Posted

oh and this gets rid of any of the shudder on take off too, well worth the $17 from oreily's. Its almost like the tranny knows whats going on now........ Oh the only downside but can live with is towed a two place inclosed home last night about 75 miles and the ride was a little bouncy but not bad i figured it was do more to the trailer being empty and tandem axle.... but a very nice mod to clean up a lot of clunking and shudder....

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