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Street Race Truck More... The Toolbox

Model A 4-Bar Suspension

9/14/2016

In this Tech Tip, John responds to a customer question about the rod end angle on his Model A 4-Bar Suspension Kit.

Whats with the angles?

“I bought a Rear 4-Bar Suspension Kit for my Model A. I noticed both ends of the bars are built to 7 degrees, one bent and the other welded. It would seem this would only work with the brackets parallel to each other, perpendicular to the rear axle. This would make the bars parallel to the frame rails also. Am I missing something?"

-Jim S.

Hi Jim, You inquired about the rear 4 bar for a Model A and you have the correct kit with 7 degree ends on the bars and the ends.  With the narrow frame of the A this allows the mounts on the rear end to be out further for more stability.  The brackets on the frame need to be installed so that the ends will not be under a bind therefore the brackets will not be straight in line with the frame rail.  The 7 degree bars and ends need to be parallel with each other and simply angle inward towards the frame once leaving the housing axle tube. I apologize but we do not have any photos of the assembled chassis. However, some of our catalogs do have photos which you may already have.

-John W.

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