4 Link info (1 Viewer)

[yldbill]

I'm considering 4 linking my 40 but am confused about link ends. What I'd like to know is the pros and cons of the different types, heim,johnny joints and rubber bushings and why use different ends on the same link. I've read about guys using heims on oneend and rubber on the other end, or johnny joints at one end and heims on the end other . Can anyone clear my confusion up?

 

[Mace]

bushings typically do not have adjustment, so you use some other type of joint for a threaded adjustment of the links..

Most of the reasoning for one over the other is personal preference.

Figure out what you want to do and go from there.

 

[Kavik]

Bill,
Use hiems where rotation at the link/hanger is likely (axle end), and bushings where it only swings (frame end).

Of course, you could use hiems all around but they are pricey and offer little "dampning" compared to bushings.

Make sure you use a common bushing that is easy to replace. I have a feeling you are not going to take it easy on them.

 

[rondog]

link ends

I'm considering 4 linking my 40 but am confused about link ends. What I'd like to know is the pros and cons of the different types, heim,johnny joints and rubber bushings and why use different ends on the same link. I've read about guys using heims on oneend and rubber on the other end, or johnny joints at one end and heims on the end other . Can anyone clear my confusion up?

I have seen too many rod ends give out ! I chose the forged johnny joints they have gobs of adjustment, are rebuildable, and are just plain beefy! check 'em out.Make sure their the forged ones - they make some with the threaded stud welded on(not so great)

 

[Mace]

a good quality 3/4" heim is stupid strong. The onyl reason they shoudl die is age (they have to be replaced periodically) or binding.

1.25" heims are what I run on my lowers with 3/4 by 5/8 heins on the uppers.

then some sort of cartridge joint on the frame side.

I really like this setup..

 

[woody]

I've run heim joints on my rear suspension for YEARS with no complaints and zero breakage...

QA-1 stuff, XMR series....5/8 bore-3/4 thread stuff....XMR 10-12 I think....

I've bent .500 wall lower arms, and the heims are still unbroken and tight. YMMV...

 

[Gumby]

I run bushings on mine. 80 series lower bushings.

Only because they were free.

They're quiet and tight and they flex far more than I can reasonably use.

 

[RHINO]

if and when i ever do a link susp i'll use bushings on the frame end and JJ's on the axle. the only reasons being a nicer road ride and lifespan.

 

[Tapage]

In this line .. just wondering if the bushing offer more control ( more rigid ) in a 4 Link ( for example ) that perform good amount of on road time .. ?

Or you can get the same control from a heim or JJoint at same suspension configuration ?

To place a valid example .. take a 80 series stock suspension ( rear ) and replace all bushing with Heims or Jjoints .. the performance on road coul be the same ?

 

[Mace]

Heims are more "rigid"
Bushings have more give so "performance" might be compromised. Plus, it is hard to not allow the to bind somehwere...
Cartridge joints (Johnny joints, RE joints, etc.) are a good compromise between a heim and a bushing.
Gyro joints are neat too. So far, they look like they are going to work perfectly on Bob..

 

[RHINO]

i think the factory uses bushings over heims for longevity and ride quality, and over cartridge for cost effectiveness.

i dont think the control of the rig is compromised or superior with any of the joint styles.

 

[Tapage]

Heims are more "rigid"
Bushings have more give so "performance" might be compromised. Plus, it is hard to not allow the to bind somehwere...
Cartridge joints (Johnny joints, RE joints, etc.) are a good compromise between a heim and a bushing.
Gyro joints are neat too. So far, they look like they are going to work perfectly on Bob..

Thanks Guys ..