Trailing arm option
 

I am wondering those that have replaced the factory trailing arms did you use a newer style with johnny joint ends and what are your opinions on using them?

Re: Trailing arm option
 

I highly recommend these from Tinworks Fabrication.
Excellent Quality and customer service.
https://tinworksfabrication.com/prod...y-truck/63-72/

Re: Trailing arm option
 

Second this. Put them on sons truck. Really nice.

Is there a advantage of having a Johnny joint over a stock bushing?
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Re: Trailing arm option
 

There’s not much if any articulation in the stock bushing.
The I-beam design of the stock trailing arm allowed it to twist.
When you build a solid trailing arm (round or square tube) it has to have a flexible joint at the front.

Thanks for the explanation.
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Re: Trailing arm option
 

Well..... It doesn't have to. There have been multiple options out there w/poly bushings. But those options built using square/round tubing w/poly bushings will definitely bind before the stock stuff would.
I think of it as going from Radials to Bias-Ply tires (backwards in functionality).

The combo of the original I-beam construction, length, orientation, & the front rubber bushings made them compliant enough to survive. Start changing some of those dynamics & it will possibly impact the effectiveness on the others.

If you're choosing aftermarket tubular constructed Truck-Arms, they need to have a spherical joint to work better than what came form GM.

Re: Trailing arm option
 

Thanks for the CORRECT explanation.