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summer project #2

Eliot

Eliot

Basic User
City
shawnee
State
KS
I had some ideas about doing some work on my jeep this summer. i was thinking about doing a coil spring conversion on the my front axle.

Reason for conversion:

softer ride
more travel
fix camber
better highway driving
better flex
better off road

Components:

X4 22” control arms/radial arms
33" tires
4.5" lift
56” Wide trick axle model 30
3.73 ratio
Track bar

Current:

Amc 360
t-18
dana 20
2.5” spring lift
1.5” shackle lift
1” body lift

Goals:

5" compression
6.5 drop
11.5 total inches of travel
minor frame changes

Questions:

Is this axle practical for this conversion
What spring calculations do I need to make
What will have to be done to run safely down the freeway at 75mph
What does the steering geometry look like
What else should I take into consideration

here are some drawing i made last night:

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I don't know the answer to all your questions but if I were going through that much work it wouldn't be with D 30 axle I would find some better D44 or D60 to do all that to.
 
the blue link is a track bar; its opposite of the steering because the dif if on the passenger side
 
The track bar needs to run parallel to the drag link and be the same length. If not you will have horrible bump steer.
 
Why not dump the shackle and body lift, then do a 4" spring lift with some better springs? Fixes all your problems for about a 1/3 of the cost. Then make sure your steering is in proper working order

x2 on Jbeemer

Best picture I could find of a RHD TJ
compare-1.jpg


It's hard to see the track bar, but it runs toward the diff side of the axle. Not in the same place as a LHD TJ. The diff doesn't matter the steering does.
 
ok the track bar need to run parallel to the drag link, what else do i need to know?
 
don87401 said:
I don't know the answer to all your questions but if I were going through that much work it wouldn't be with D 30 axle I would find some better D44 or D60 to do all that to.
Click to expand...
X2.....
 
Is there a junkyard axle with a d44 and a passenger diff?

Does an international scout have one?
 
ok so:

i should look for a d44 out of a j10, j20, or Jeep Cherokee if I'm going to do a axle swap.

i know i would still have to cut of the spring purchase and weld on new brackets. but does this mean, i don't have to cut off the knuckles and unjust the caster and diff angle?
 
This will open a huge can of worms. First of all your front axle will be much wider than the rear. Second you will have to address steering, third longer brake lines, custom shock mounts, new drive shafts, 6 lug front axle so different wheels. This is just off the top of my head.

You would want a narrow track fsj front axle from a waggy it's a little narrower than the j10.

You would have to find a narrow track rear or a scout rear to match your front.

If I was serious about this I would consider putting an LJ chassis under the scrambler body. You get coils front and rear, wider better axles, better brakes, better frame.

With all that being said YJ springs would be an upgrade and could be done in a weekend.
 
And that's not considering coil or coilover clearance issues with the frame, exhaust clearance/routing, brake and fuel lines in the way of the upper link mounts, etc.
 
LetchcoreCJ7 said:
If I was serious about this I would consider putting an LJ chassis under the scrambler body. You get coils front and rear, wider better axles, better brakes, better frame.
Click to expand...

What about a TDK chassis customized to be setup for a SCRAM body with TJ suspension..........
 
I not think i want to change frames... i know it may have to be strengthened but a new frame is out of the question right now.

waggy = wagoneer?

what is the difference between yj springs and cj spring
 
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