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Author Topic: Remove rear leafs  (Read 98 times)

Blackmamba

  • Single Axle Driver
  • *
  • Posts: 5
Remove rear leafs
« on: November 14, 2017, 05:34:21 PM »

My HD has the 5 rear springs and the 5 overloads, while this is  great for carrying weight the truck is classed as a private light vehicle in the UK meaning I can drive it on my regular car licence up to 3.5t, which is what it weighs empty!

The ride is rock hard, as i won't be able to carry any weight I've been thinking about removing some of the leafs from the back, has anyone done this, I am unsure as to how many to remove, still plan to use it for towing my 3.5t plant trailer so don't want to get carried away!
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someotherguy

  • 3500HD Hero
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  • Posts: 871
Re: Remove rear leafs
« Reply #1 on: November 15, 2017, 04:58:06 PM »

You'll notice the overload pack doesn't even make contact until you've loaded the truck heavily enough that it compresses the main pack quite a bit.  So the thinking goes, makes no sense to touch the overload pack because it's not even in play when the truck is riding its roughest - light load/no load situations.  However, if you start pulling leafs out of the main pack, it will compress under lighter loads, meaning you will find the overload pack coming into play sooner, which will defeat your efforts.

Sooooo...think about what you really want to achieve.  If you start pulling main pack leafs you may need to completely remove the overload pack.  Then the truck isn't worth much for hauling anything.

What kind of bed do you have on it?  If it's just a flatbed or stakebed that doesn't weigh much unloaded, so that you swap between light rear end unloaded/heavy rear end when you have a load on, the only solution may be to pull some leafs like I described in the previous paragraph, but invest in a heavy duty airbag setup installed with an onboard compressor so you can adjust them on the fly.

Believe me, I know they're a rough ride unloaded.  I put plenty of miles on a couple of HD's with no bed at all on them and it was a challenge to keep the rear end on the ground as it hit bumps.
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06 Silverado ISS / 06 Silverado SS / 06 300C SRT8

Blackmamba

  • Single Axle Driver
  • *
  • Posts: 5
Re: Remove rear leafs
« Reply #2 on: November 19, 2017, 08:54:41 AM »

Thanks for your comments, its fitted with a regular 8' bed, I added a few images of it last week in the gallery page. It sounds like removing the overloads and some of the leafs from the main pack may be the way ahead in that case, I cant legally carry any weight in it on a regular car licence in the UK and it is only likely to be used occasionally to tow my 3.5t plant trailer, will keep the leafs and that way it can always be reclassed as a 7t truck a later stage. It is an ex military chassis and still has the bullet proof inserts in the tyres, I spoke to the previous owner who built it and apparently they are a nightmare to remove, these cant be helping either!
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someotherguy

  • 3500HD Hero
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  • Posts: 871
Re: Remove rear leafs
« Reply #3 on: November 19, 2017, 11:47:07 AM »

Those former M.O.D. trucks look so overbuilt that it's possible they added more springs than the factory packs originally had.  I know there were some pics of other members rebuilding these but if you have a good clear pic of both your spring packs that would help determine if they're added-onto.

Richard
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06 Silverado ISS / 06 Silverado SS / 06 300C SRT8