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 SAS leaf spring question
#931793
02/18/09 10:03 PM
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Joined: Jan 2005
Posts: 125
OP
Wheeler
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I bought a set of Superlift 2 1/2" leaf springs for my upcoming SAS and v8 conversion in my swb. The springs came with 2" extended shackles and mounting brackets and the stationary end frame brackets.
My question is, is there a reason why some set-ups put the shackles at the front of the springs towards the bumper, while others mount the shackles at the rear of the spring? I am leaning towards rear mounted shackles but want to know if that would be a mistake....or is it just a matter of preference?
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Re: SAS leaf spring question
[Re: raiderquest]
#931794
02/18/09 11:28 PM
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Joined: Aug 2007
Posts: 181
Wheeler
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Extreme 4x4 had explained this two weeks ago. Acording to them if you mount the swing shackle in front of the spring the tire will bounce away from an object. And if you mount it rear of the spring your tire will bounce toward an object. I'm not saying this is my discovery just what they said.
1993 Chevy Suburban 2500- Tow Rig
1991 Mitsubishi Montero LS LWB
SR Parts:
Rear Axle
Coils
Trailing Arms
Front Calipers
and soon to have UCA's and idler arm.
Dual Bouncies
Air Lift Airbags
Aisins
33x12.50x15 Custom Grooved TSL's
Body lift in the near future.
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Re: SAS leaf spring question
[Re: raiderquest]
#931795
02/18/09 11:54 PM
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Joined: Apr 2002
Posts: 3,622
Roll Me Over
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I've heard arguments for both sides, and I would lean towards shackle to the rear. The on-road ride should be better and performance off-road should be better too.
The only thing I can think of that would be a positive for the forward shackle is it provides better driveshaft geometry during full travel of the suspension.
Pay attention to your slip on your shaft and I would consider that a non-issue.
Rear mounted shackle has my vote.
'06 Dakota QC 4.7 6sp 4x4
'88 Mighty Max
'77 KZ1000 fun old bike
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Re: SAS leaf spring question
[Re: raiderquest]
#931796
02/19/09 12:01 AM
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Joined: Aug 2008
Posts: 1,186
Body Damage is Cool
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choose the rear
Last edited by 0778drz110; 02/19/09 12:02 AM.
'88 Raider, 33" Maxxis, 2" body lift, 10K winch
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Re: SAS leaf spring question
[Re: raiderquest]
#931797
02/19/09 12:29 AM
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Joined: Apr 2006
Posts: 1,412
Body Damage is Cool
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Lots of Jeep guys move the front shackles from the front of the springs to the rear. It's called the shackle "flip" or sometimes "reversal" and a quick Googling will find you tons of info on hows and whys as well as kits for sale.
1991 Mitsubishi Pajero XP TD LWB family hauler.
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Re: SAS leaf spring question
[Re: redbull]
#931798
02/19/09 12:44 AM
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Joined: Jan 2005
Posts: 125
OP
Wheeler
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Thanks for the responses..... I am going to do the rear mount. It was what I was thinking of doing and your input has confirmed for me that this is the way I want to do it..thx... <img src="/forums/images/graemlins/patriot.gif" alt="" />
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Re: SAS leaf spring question
[Re: ncdieselwrench]
#931799
02/19/09 01:09 AM
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Joined: Dec 2000
Posts: 6,896
Trail Leader
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Extreme 4x4 had explained this two weeks ago. Acording to them if you mount the swing shackle in front of the spring the tire will bounce away from an object. And if you mount it rear of the spring your tire will bounce toward an object. I'm not saying this is my discovery just what they said. No, the other way around.
I just want to tell you both good luck, and we're all counting on you.
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Re: SAS leaf spring question
[Re: sparkem]
#931800
02/19/09 01:37 AM
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Joined: Feb 2000
Posts: 3,269
Roll Me Over
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This is an age old debate. Most go with the rear mounted. But there are those that argue that a forward shackle will aid the vehicle in climbling/negotiating over an obstacle as it moves the axle slightly forward during compression.
I would go with the rear mounted personally, just due to the fact that if you hit something ( ie a BF rock) off road your less likely to damage a solid well built mount than you would having a big honkin shackle limiting your approach angle.
99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..
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Re: SAS leaf spring question
[Re: sparkem]
#931801
02/19/09 03:18 AM
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Joined: Aug 2007
Posts: 181
Wheeler
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Extreme 4x4 had explained this two weeks ago. Acording to them if you mount the swing shackle in front of the spring the tire will bounce away from an object. And if you mount it rear of the spring your tire will bounce toward an object. I'm not saying this is my discovery just what they said. No, the other way around. Yes sir you are correct, I really don't listen to what they have to save, just something to kill time when nothing else is on. I love there unrealistic builds, even there "real world" build is not real.
1993 Chevy Suburban 2500- Tow Rig
1991 Mitsubishi Montero LS LWB
SR Parts:
Rear Axle
Coils
Trailing Arms
Front Calipers
and soon to have UCA's and idler arm.
Dual Bouncies
Air Lift Airbags
Aisins
33x12.50x15 Custom Grooved TSL's
Body lift in the near future.
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Re: SAS leaf spring question
[Re: ncdieselwrench]
#931802
02/19/09 07:27 AM
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Joined: Sep 2001
Posts: 8,557
Forum Moderator
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I built my setup with shackle reverse.
#1 Better street manners
#2 Does not get hung up on underwater rocks/mud/whatever.
87 Raider 4D56td v5MT1
31's..Basically Stock
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