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Welcome to the 3500HD.com forum created October 2009

Author Topic: 5 or 8 rear leafs  (Read 843 times)

remingtongoose77

  • Single Axle Driver
  • *
  • Posts: 18
5 or 8 rear leafs
« on: May 06, 2017, 01:33:32 AM »
Hi,

I'm looking for some wisdom on the rear leafs on my truck. I have (2) sets of 5 leafs on each side of the rear of my truck. When it had a flat bed on it the top set of 5 was engaged. Now I took the bed off there is an air gap between the tips of the top stack and the frame mounts.

My question is this: I am rebuilding the entire truck and in this process replacing all springs and related parts. I see an option of buying an (8) leaf rear stack and I assume I will still use the top set of 5. My plan for the truck is to tow a 5th wheel camper. Is anyone in or been in my situation. Should I keep the (2) stacks of 5 or go to the lower stack of (8) and upper of (5) ?

I want a nice smooth ride like I have now, but I don't want to be deep in the travel when the camper is attached.

Thoughts and experiences please.




Raymo

  • Global Moderator
  • 3500HD Driver
  • *****
  • Posts: 381
  • Age: 30
  • Location: Port Huron Area, MI
Re: 5 or 8 rear leafs
« Reply #1 on: May 06, 2017, 06:02:56 AM »
I can tell you that with no longer having the overloads engaged, all bets are off. I have converted my truck to a pickup so there is hardly any weight on the back. Small bumps react like big bumps, and big bumps require two hands on the wheel when those overloads make contact. I can also tell you that I needed about 1,500lbs of tougne weight to stay on the overloads.

I do live in Michigan, though. So our roads may have a lot to do with it.  ;D
'94 3500-HD, Cummins, Getrag, NP205. Shortend rear frame with a Pickup Bed. Dana 60 front, stock 80 rear.

'03 2500-HD 8.1 and Allison

remingtongoose77

  • Single Axle Driver
  • *
  • Posts: 18
Re: 5 or 8 rear leafs
« Reply #2 on: May 06, 2017, 09:18:28 AM »
Raymo,

So your calling the top stack the overload springs correct? I am planning to keep them, but our trucks come with either 5 or 8 springs on the primary stack, I guess that would be the lower stack.

Based on your comments I suppose I will replace the original 5 on the bottom and 5 on the top with new ones and abandon the 8 on the bottom and 5 on the top idea.

Thank you sir.

Any other comments welcome.

AZTimT

  • One Ton Driver
  • **
  • Posts: 61
  • Age: 40
  • Location: Western Montana
  • K3500HD from when it wasn't just a sales gimmick!
Re: 5 or 8 rear leafs
« Reply #3 on: May 17, 2017, 06:17:19 PM »
My 5/5 setup only goes down 1.5-2 inches with a 30 ft steel gooseneck and backhoe right behind the tongue to put more weight on the truck and stay DOT legal. I get almost the same result with a 3000 lb water tote centered over the axle which is about what I was shooting for on tongue weight. I doubt an RV 5er is going to get much heavier than that.
94 K3500HD (factory Monroe 4wd upfit) short wheel base 9' bed 454 no more/NV4500HD/NP261HD/D70 frt/D80 rear 5.13's Cummins powered with 3.73's.
93 C3500HD long wheel base parts truck 14' bed 6.5(gone)/NV4500HD/D80 4.63
95 C3500HD medium wheel base 11' bed 6.5/4L80E/D80 4.63
2000 C3500HD Monroe extended cab 9' bed, 6.5/4l80E/D80HD 4.63 will become 4wd with D70 front and repowered some day...

AZTimT

  • One Ton Driver
  • **
  • Posts: 61
  • Age: 40
  • Location: Western Montana
  • K3500HD from when it wasn't just a sales gimmick!
Re: 5 or 8 rear leafs
« Reply #4 on: May 19, 2017, 03:36:23 AM »
I stand corrected, measured it last night loaded at 36 1/4" and then 37 5/8" unloaded.

94 K3500HD (factory Monroe 4wd upfit) short wheel base 9' bed 454 no more/NV4500HD/NP261HD/D70 frt/D80 rear 5.13's Cummins powered with 3.73's.
93 C3500HD long wheel base parts truck 14' bed 6.5(gone)/NV4500HD/D80 4.63
95 C3500HD medium wheel base 11' bed 6.5/4L80E/D80 4.63
2000 C3500HD Monroe extended cab 9' bed, 6.5/4l80E/D80HD 4.63 will become 4wd with D70 front and repowered some day...

 


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