4 link or 3 link because 2link stinks (1 Viewer)

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FJ40Dude75

FJ40Dude75

Joined
Nov 12, 2002
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okay I have been pulling out my hair tring to make the 2 link work but it doesnt work with what I am tring to do so I have been looking at 4link or maybe 3 link using a y link upper I already have my lowers on and they are about 30" eye to eye and I make my uppers shorter thean that say 20" and does anyone know where they 4 link calculater went ?If I decide to do an upper y link will a heim have enogh travle
 
The 4 link calculator is posted for download on POR somewhere. Do a search for it and you will find it.

Heim's should have enough travel for whatever you want to do. At worst, you might need to add some misalignment bushings to get more angularity.

I can't picture why the 2 link won't work, it is the most space concious design of the 3 mentioned, but that said, there is nothing wrong with a 3 or 4 link either and technically I think that they can be built to give better performance than the radius arm / 2 link setup. Go for it!

Ed
 
Upper Y link?

Then you are saying that you will be converging the third top link on one of the lower links?
 
no Its more of an A link and it attaches to the frame and then center of axle built it up last night and we cycled it and it works great this thing is going to be crazy also I shouldnt need a panhard . and it was alot eaziear than a 4 link wasnt to much calculating needed
 
shouldn't need a panhard?!?!?

unless you have a sharply triangulated true 4-link front suspension, a panhard is required.

A-link???? break out that digi and show some pics....
 
I never could figure out how to post pics on here but I have them
 
resize them to 640x480 and 80k or less in filesize....when you hit "post reply" make sure the additional options box is expanded, then use the "manage attachments" button to post them
 
it says invalid post link when i try
 
thats basically it exept mine goes out and is attached right at the frame no tube inbetween frame had no room for that
 
that is called a 3 link....the upper is V shaped, attaches with one joint on each frame rail, and a single center joint at the axle....there are then two parallel lower links.

Defined as a 3-link since there are 3 separate links on the front axle housing, 4 at the frame.
 
yeah when I first posted I wasnt sure which I was going to do then last night we sat out there and did the 3 link I wish I could figure out these computers to get your opinon on what I did
 
I sent them and in the pics I still have to make new brackets to frame and the center bracket is getting flipped up for more driveshaft clerence
 
woody said:
resize them to 640x480 and 80k or less in filesize....when you hit "post reply" make sure the additional options box is expanded, then use the "manage attachments" button to post them
Click to expand...

I'm quoting this because your photos were WAY WAY WAY oversize....1632x1232 isn't gonna work, and 5890k isn't either.......no wonder your uploads bombed.....the standard Windows program for viewing files allows you to resize them.
000_0202.jpg
000_0203.jpg
000_0204.jpg
 
now, where to start....

First, the upper heim on the axle is in the wrong plane....the bolt should run vertically. All your side-to-side control is on the race itself now, and in it's weakest position....

second, not sure what your using for a welder, but you have a much better chance of getting them good on clean metal....

3rd, the upper link is guaranteed to either smack the oil pan, or force you to run a very tall suspension.....

the forces on front brackets is tremendous due to steering.....running a panhard-type setup creates much improved side to side control, easier link mounting, and much improved steering control. It does create some oddities on travel, but is IMO worth it.
 
While Woody obviously doesn't understand the finer points of bootie-fabberie, he makes some valid points. Listen to the man. :D

Ed
 
Isn't the upper "Y" sometimes referred to as a Watt's link?....

Also, am I seeing voids in the weld bead where the sides of the "Y" converge at the axle (bottom picture)? If so, do yourself a huge favor and grind out as much of that weld as you can and try again. Hopefully it's just shadow cast by the camera flash and not missing weld...
 
Roswell Rat said:
Isn't the upper "Y" sometimes referred to as a Watt's link?....
Click to expand...

IIRC a Watts link is a pipvoting bar mounted to the top of the axle with two bars running opposite directions from each end to the frame intended to control side to side movement. Kind of a high tech / complex panhard setup. Most popular usage is in pavement pounders.

I could be crazy on this one though.

Ed
 
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