Full width Chevy axle help leaf help

Joined
Mar 28, 2007
Messages
63
Location
Congress, AZ
Putting a spring over Dana 44 up front. Spring pad centers are 32" wide. I cant put the shackle end of my spring below the frame because it throws my caster way off. I cant outboard the mount higher up the side of the frame because the frame width is the same width I have between my springs and their isn't any room for the shackle to swing up alongside the frame. HELP, out of ideas.
 
Joined
Mar 28, 2007
Messages
63
Location
Congress, AZ
Is there no way to put Chevy axles under an FJ without cutting and turning knuckles? I know its been done. What am I missing? Who's build should I look up guys?

If I cut and turn knuckles, my pinion is still going to be pointed at the ground.
 
Joined
Oct 21, 2013
Messages
2,040
Location
Naples Florida
It is the spring over that gets you. Even if you were using Toyota axles you would probably be in the same boat. If you cut and turn your knuckles you can point the pinion anywhere you want. The idea is to set your caster correct and then to angle the pinion in the proper orientation. If using standard u-joints it is different than using say a double cardin.
 
Joined
Oct 21, 2013
Messages
2,040
Location
Naples Florida
Any of the threads that discuss doing a SOA will work for you. Your setup will be different but the geometry will be the same.
 
Joined
Mar 28, 2007
Messages
63
Location
Congress, AZ
My spring pad is cast in so regardless of where I set my caster after a cut and turn, my pinion will still be pointed too far down
 

GLTHFJ60

Rum Runnin'
SILVER Star
 
Joined
Apr 18, 2005
Messages
24,208
Location
Durham, NC
Most Dana axles have the PS spring pad cast into the diff center section, making it significantly more difficult to do a cut and turn than on a toyota axle.

I put a SOA D60 in the front of my FJ60 without a cut and turn. I've got a tiny bit of wander on the interstates and my intended fix will be caster plates. My build thread is below in my signature, Moonshine.
 
Joined
Mar 28, 2007
Messages
63
Location
Congress, AZ
My problem could lie in the springs im trying to use up front as they have a significant arch to them with no load, (fforward offset pin) causing my spring to point the diff downward. What springs did you use glthfj60? I assume something flatter and shorter than what I tried. I am using a 54" Dodge durango leaf that has a 10" arch to it
 

GLTHFJ60

Rum Runnin'
SILVER Star
 
Joined
Apr 18, 2005
Messages
24,208
Location
Durham, NC
My problem could lie in the springs im trying to use up front as they have a significant arch to them with no load, (fforward offset pin) causing my spring to point the diff downward. What springs did you use glthfj60? I assume something flatter and shorter than what I tried. I am using a 54" Dodge durango leaf that has a 10" arch to it
I used more or less flat, stock FJ60 rear springs.

You'll be hard pressed to get things to work with springs that have that much arch in them. That's insane man.
 

GLTHFJ60

Rum Runnin'
SILVER Star
 
Joined
Apr 18, 2005
Messages
24,208
Location
Durham, NC
GLTHFJ60 thanks for the advice. Ill see if i can get the caster closer with a flat/shorter spring
You don't necessarily need to get a shorter spring, but flatter would help.

FYI, the FJ60 rear springs in this picture are 48" center pin to center pin:

 
Joined
Mar 28, 2007
Messages
63
Location
Congress, AZ
If I ran shackles on the front it would be close to fixing the bad angle. I am just worried about a rough ride
 

GLTHFJ60

Rum Runnin'
SILVER Star
 
Joined
Apr 18, 2005
Messages
24,208
Location
Durham, NC
If I ran shackles on the front it would be close to fixing the bad angle. I am just worried about a rough ride
Why are you worried about a rough ride with the shackles up front?

Also, you were going to run springs with a 10" arch and were worried about a rough ride?

Rough ride is more about spring rate and shackle angle than which orientation the spring is in. My ride is nice and smooth IMO.
 

Mace

rock scientist..
Staff member
s-Moderator
 
 
 
Joined
Feb 17, 2002
Messages
21,459
Location
Las Vegas
So right now your shackles are in the rear? That's not the stock method. Shackles in the front is. not that each does not have it's advantages, but a shackle forward can provide the same quality ride as one in the rear of the spring.
 
Joined
Mar 28, 2007
Messages
63
Location
Congress, AZ
Yes, I was trying to put the shackles in the rear and cant get the caster angle close enough. My springs have a 10" arch but arent rated that high so they should flatten out some. Everything I have been able to find on front shackles says the ride is rougher as the tire moves forward so I was trying to avoid bumper mounted shackles
 
Joined
Dec 3, 2008
Messages
133
Location
Lake Arrowhead, CA
As long as your shackle angle is around 45* it should ride nicely. I have my shackles up front but i haven't been able to drive it yet.
Im also using a Chevy D44.
 

GLTHFJ60

Rum Runnin'
SILVER Star
 
Joined
Apr 18, 2005
Messages
24,208
Location
Durham, NC
As long as your shackle angle is around 45* it should ride nicely. I have my shackles up front but i haven't been able to drive it yet.
Im also using a Chevy D44.
45* when fully loaded and on the suspension. If anything, you want to be shy of 45* rather than over 45*. This angle is working extremely well for me:

 
Top Bottom