That's a big ass leaf spring!

[Jraymer360]

http://annarbor.craigslist.org/pts/3583869492.html

 

[alwaysFlOoReD]

I wonder if it may be a traction bar. The spring radius doesn't seem to follow from the back to the front.

Richard

 

[Jraymer360]

here's another photo

could be but i think it's the spring lol.

 

[Jim Oaks]

Leaf spring with a traction bar.

 

[ZMan]

ya thats definitely a traction bar, it just doesn't line up..

 

[94 lngbd]

ya thats definitely a traction bar, it just doesn't line up..

optical illusion like your avatar showing you hauling a airplane