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Old 11-25-2016, 08:46 PM   #1
dave666693
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Heavy loads help

I have a 1971 GMC 4x4 3/4 ton on leaf springs. This is mainly a farm truck. I haul 2 yards of gravel at a time and need options on beefing up the rear suspension. In the old days you could take your leaf springs to a shop and have leafs added. Is that still the case?
Should I get a modern overload spring kit, air bags or just look for some 1 ton springs and swap them out?
Thanks in advance for any help!

Also considering a narrow dually rear end. Is that an easy swap?
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Old 11-26-2016, 05:56 AM   #2
andrewmp6
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Re: Heavy loads help

Do you have a spring shop locally to you ?If not talk to http://www.denverspringandsuspension.com/ they have custom made me springs in the past.If they can't do it http://offroaddesign.com/ can do it also.I would have custom springs made or grab 1 ton springs.As far as the rear end if it came out your trucks body style it might just bolt in.If you want a later rear end moving the spring perches and shock mounts are in order.Its just cutting and welding tho.
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Old 11-26-2016, 12:11 PM   #3
ranger danger
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Re: Heavy loads help

Quote:
Originally Posted by dave666693 View Post
I have a 1971 GMC 4x4 3/4 ton on leaf springs. This is mainly a farm truck. I haul 2 yards of gravel at a time and need options on beefing up the rear suspension. In the old days you could take your leaf springs to a shop and have leafs added. Is that still the case?
Should I get a modern overload spring kit, air bags or just look for some 1 ton springs and swap them out?
Thanks in advance for any help!

Also considering a narrow dually rear end. Is that an easy swap?
The simple answer is Yes, you can find a local spring shop and just add leafs. You would be better off with a new spring pack. 2 tons is a lot of weight on a 3/4 ton diff. Something like a Dana 80 would be better. I know they were stock in the 1995 through 2001 dodge ram's with the diesel in single tire (not duel).
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