Pirate 4x4 banner

1 - 7 of 7 Posts

·
Registered
Joined
·
5,164 Posts
Discussion Starter #1
I am in the process of building the rear suspension on my project vehicle. The plan is to use a 3 link suspension. The upper section will be an A-Arm with the tip of the A connecting to top of the rear diff via a Rod End and the legs of the A connecting to the frame via bushings. The lower control arms will be connecting via rod ends on both ends to the frame and bottom of the axle tubes.

The questions I have are for anyone that has built a similiar set-up.

1. What tube material did you use for the top. Currently I am thinking 1.5"x.180 Wall DOM.

2. What tube material did you use for the LCA's? I've seen guys running almost solid steel bars (tube inside of tube inside of tube) still bend them on rocks and such. And I've seen a more flexible (aluminum alloy?) material used that flexes instead of bending. Which did you use and why? And if you were to do it all over again which would you use?

Thanks,
 

·
Registered
Joined
·
1,265 Posts
Well, I used solid bushings on my combo Y arms, with 1.75"x.375 4130 CrMo tubing. I don't think I could ever bend these. I personally think that even .25 is too small for round tubing.

Go big or go home. <IMG SRC="smilies/smile.gif" border="0">

Cheers
Bob
 

·
Registered
Joined
·
195 Posts
Originally posted by Mike Chatfield:
<STRONG>The upper section will be an A-Arm with the tip of the A connecting to top of the rear diff via a Rod End and the legs of the A connecting to the frame via bushings.</STRONG>
Any particular reason you chose to mount your triangulated 3rd link this way instead of the other way around? Like have the tip of the a mounted to the frame end and the legs mounted at the axle end? Just curious.
 

·
Registered
Joined
·
1,166 Posts
im doing almost the same setup, ive been planning on:

2" .25" DOM

OE TJ rubber rubber bushings at all frame mounts.

johny joints at the axle mounts.


what length arm are you thinking about? and whats your front suspension like, i assume this is going under the lengthened YJ chassis?

feel free to email me and well exchange designs.
 

·
Premium Member
Joined
·
2,056 Posts
im using dom 1.75 .375 with johnny joints in the proces right now of designing it three link also with the point on the diff the only thing im thinking of doing is making the mounting point turn down and make the bolt that holds the johnny joint point front to back . it just seems more of a natural motion to me but what do i know. the lower links will also be johnny joints both end and as straight as poss. on the diff end the links will make about a 45 degree down to the mount................my .02 <IMG SRC="smilies/biggrin.gif" border="0">
 

·
Registered
Joined
·
5,164 Posts
Discussion Starter #6
Originally posted by BabyWrangle:
<STRONG>Any particular reason you chose to mount your triangulated 3rd link this way instead of the other way around? Like have the tip of the a mounted to the frame end and the legs mounted at the axle end? Just curious.</STRONG>
The only reason I have is that I'd have to fab and mount a cross member for the tip of the A to mount. I tend to the KISS principle (Keep It Simple, Stupid) <IMG SRC="smilies/biggrin.gif" border="0">
 

·
Registered
Joined
·
5,164 Posts
Discussion Starter #7
Originally posted by JEEP_TJ_FREAK:
<STRONG>what length arm are you thinking about? and whats your front suspension like, i assume this is going under the lengthened YJ chassis?</STRONG>
The "legs" of the A-Arm will be about 42", the radius that the diff mount will travel relative to the frame will be 36"

The LCA's will be 48" long and will be mounted inside the frame.

Click on the XTV link to see what I'm planning.
 
1 - 7 of 7 Posts
Top