?? about truck arm suspensions

I have noticed that almost all the truck arms I looked at online are curved in the rear...why is this? I am going to make my own set and was gonna make them straight...but I don't wanna mess up if they need to be curved....

 

A lot of discussion on this, Try a search.

 

Here are the ones I made for my 55 Olds. I made them out of 2x3 I-beam instead of square tubbing, so that they would be able to twist when going over uneven dips in the road and not put so much stress on the bushings. Mine come back at about 30 degrees outward and the turn straight back at the rearend so I could use regular axle saddles. I was running a triangulated four link previous to this setup and I must say that I am way more happy with the ride and functionality of the truck arms.

 

simple. If they are straight, you don't get as much clearance for travel as you do when they have some drop to them. Mechanically, it doesn't matter, as long as your geometry overall is correct.

 

Read through this thread.It has alot of good info in it.
http://www.jalopyjournal.com/forum/showthread.php?t=144403

 

FWIW--Late 40s early 50s(?) Oldsmobiles used a rear "truck" arm linkage made of a tapered "C" channel that is straight. A pig tail coil spring mounted behind the axle at the very end of the arm.

 

Take a look at Ford Twin-I-Beam front axles from the mid-60s to the 70s. I've always thought those beautiful forgings would make some sweet radius rods or ladder bars.

 

Ok I dont think a few understood my question...I understand that the run at an angle narrow at the front and wide at the rear....some that I have looked at, about a foot or so ahead of the rear axle they are bent upward and I was gonna make mine run at an angle front to back with no upward bend...Here is a pic from No Limit's website that shows their kit, their arms are flat (with no bend)


and here is a pic from Laughlin Racing's website of their arms that have the bend...


Is there a benefit to this bend or whats the purpose of it???

 

Hey Droplord I like that idea Looks real clean!!

 

Try stockcarproducts.com the sell truck arms with rubber bushings or solid pivit type and lot's of other parts

 

The bend is for more floor/frame clearance at a given ride height.

 

bttt