Shackle Relocation boxes (lift shackle correction)
#1
CF Veteran
Thread Starter
Join Date: Jan 2010
Location: Indianola IOWA
Posts: 2,059
Likes: 0
Received 1 Like
on
1 Post
Year: 1992
Model: Cherokee
Engine: 4.0
Shackle Relocation boxes (lift shackle correction)
Im a horrible typist and speller guy
A leaf sprung suspention consitsts mainly of 2 components. the springs and the shackle. Leaf spring are a certain length and arch for a vehicle and same with the shackles. For the suspention to work properly the shackel should maintain a 35-45 degree angle. When you add higher arch springs or a lift shackle it throws the angle of the rear shackle out of wack.
Like so
This is a 2in lift shackle. It is almost 90 degrees (straight up and down) Great for lift but horrible for ride quality and articulation. As the leaf pack starts to droop the shackle will actually pull up on it towards the body which kinda defeats the purpose.
Like so
A leaf sprung suspention consitsts mainly of 2 components. the springs and the shackle. Leaf spring are a certain length and arch for a vehicle and same with the shackles. For the suspention to work properly the shackel should maintain a 35-45 degree angle. When you add higher arch springs or a lift shackle it throws the angle of the rear shackle out of wack.
Like so
This is a 2in lift shackle. It is almost 90 degrees (straight up and down) Great for lift but horrible for ride quality and articulation. As the leaf pack starts to droop the shackle will actually pull up on it towards the body which kinda defeats the purpose.
Like so
#5
CF Veteran
Thread Starter
Join Date: Jan 2010
Location: Indianola IOWA
Posts: 2,059
Likes: 0
Received 1 Like
on
1 Post
Year: 1992
Model: Cherokee
Engine: 4.0
I am not completely done yet (as you can see, no holes) but here is a ruff of the corection. My shackles are 6inches. I put a piece of tape on my tapemeasure at 6inches. here are the the 2 comparisions.
first is how it sits now (with th 90 degre angle)
second is how it will sit. by moving the shackle mount down 3in or so I am only guna gain .5 to .75 inch more lift. but shooting for 3 more inches of droop out of the rear. I will try to get them installed tomorrow but day is looking pretty busy so we will see.
I would apreciate any comments or sugestions
first is how it sits now (with th 90 degre angle)
second is how it will sit. by moving the shackle mount down 3in or so I am only guna gain .5 to .75 inch more lift. but shooting for 3 more inches of droop out of the rear. I will try to get them installed tomorrow but day is looking pretty busy so we will see.
I would apreciate any comments or sugestions
Last edited by posjeepxj; 03-30-2010 at 10:05 PM.
Trending Topics
#8
CF Veteran
Thread Starter
Join Date: Jan 2010
Location: Indianola IOWA
Posts: 2,059
Likes: 0
Received 1 Like
on
1 Post
Year: 1992
Model: Cherokee
Engine: 4.0
i dropped one of the bars i made the ramp out of on it. 2in .250 wall. its heavy stuff. Ill just screw it to the ramp now. i got 3 or 8 back ups
#9
Newbie
Join Date: Nov 2009
Location: Ft. Collins CO.
Posts: 13
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1996
Model: Cherokee
Engine: 4.0 H.O.
Looks good to me man. By moving your shackle mounting point forward, it allows the shackle to hit 90 degrees when it is at full droop.. giving the most flex. Instead of riding at 90 degrees then losing flex and having a crappy ride. I believe that your ride should improve as well with this...? kinda like a long arm conversion for the front... doesnt hit as hard with a big lift when you go over somethin.? So your last picture shows where the new pivot point will be (where the m. tape begins) on the frame?
I believe i will be doing something similar to my jeep when i get out of school for the summer... more along the lines of this though. http://go.jeep-xj.info/HowtoRearLeafMounts.htm but i think i like your "adaptor" more and will probably copy you so i dont have to weld to my frame..
I believe i will be doing something similar to my jeep when i get out of school for the summer... more along the lines of this though. http://go.jeep-xj.info/HowtoRearLeafMounts.htm but i think i like your "adaptor" more and will probably copy you so i dont have to weld to my frame..
#11
CF Veteran
Thread Starter
Join Date: Jan 2010
Location: Indianola IOWA
Posts: 2,059
Likes: 0
Received 1 Like
on
1 Post
Year: 1992
Model: Cherokee
Engine: 4.0
Looks good to me man. By moving your shackle mounting point forward, it allows the shackle to hit 90 degrees when it is at full droop.. giving the most flex. Instead of riding at 90 degrees then losing flex and having a crappy ride. I believe that your ride should improve as well with this...? kinda like a long arm conversion for the front... doesnt hit as hard with a big lift when you go over somethin.? So your last picture shows where the new pivot point will be (where the m. tape begins) on the frame?
I believe i will be doing something similar to my jeep when i get out of school for the summer... more along the lines of this though. http://go.jeep-xj.info/HowtoRearLeafMounts.htm but i think i like your "adaptor" more and will probably copy you so i dont have to weld to my frame..
I believe i will be doing something similar to my jeep when i get out of school for the summer... more along the lines of this though. http://go.jeep-xj.info/HowtoRearLeafMounts.htm but i think i like your "adaptor" more and will probably copy you so i dont have to weld to my frame..
#12
CF Veteran
Thread Starter
Join Date: Jan 2010
Location: Indianola IOWA
Posts: 2,059
Likes: 0
Received 1 Like
on
1 Post
Year: 1992
Model: Cherokee
Engine: 4.0
finally put these bad boys on. more details on build page. ride quality better, droop batter. had to mod original design. also put new shocks on