Quote:
Originally Posted by SCOTI
The main reason the 62~72 2-link (aka trailing arm suspensions) work is because of the length & orientation of the arms within the chassis.
Most 2-link 'kits' are actually 2 'links' that are typically parallel to the frame/chassis & less than half the length of the 62~72 trailing arms. There was a thread @ bagit.com (or baginit.com?) about pinion angle change during suspension extension/compression when using this shorter style 2-link. It is a very good read. I did the little experiment that was suggested & was suprised to see almost 12deg of pinion angle change @ less than 4" total suspension movement w/a typical length 24" link (the 24" link is what would typically be used if swapping a leaf suspension over to a 2-link using the stock front leaf hangers).
That's a lot of change & even if you set the proper pinion angle @ the avg ride height, theres still a bunch of change w/the typical 2" of rebound or extension you'll experience driving down the road.
Just food for thought. I would suggest a 4-link for something that sees regular street duty & the 2-link for the weekend show warrior unless it's the 62~72 truck arm 2-link. We all know they work quite well.
|
Good post man
The trailing arms and a two link realy have nothing in common other than they look similar and have two connecting point. The geometry of a trailing arm system accounts for pinion angle change and axle articulation by the length of the arm being equal or close to equal length of the driveshaft. Plus the mounting of the arms angling inboard towards the center of the chassis from out on the axle ends allows for articulation. A conventional 2- link does not account for either of these scenarios.