Why not use bushing grease on a-arm bushings? Options

[Tdskip]

Hi guys - I know how it is commonly done including Ian’s great video. Is there a reason why not to use bushing grease instead of softsoap?

So you want the bushing NOT to move or rotate ones installed? I assume that is a reason but wanted to ask.

Thanks.

[Chi-town]

Or just use a quality poly bushing like Powerflex and let the torsion bar be the spring and not the bushings

[Superhawk996]

Or just use a quality poly bushing like Powerflex and let the torsion bar be the spring and not the bushings

The rubber bushing is there for isolation from road noise and road & impact harshness.

The bushing isn't there to be a spring. The "spring" effect of the bushing as measured in lbs force to rotate the A-arm per inch of wheel travel is trivial as compared to the spring rate of the torsion bar. What you esentially have is two springs in series. The lower rate "spring" (i.e. the bushing torsional rate) response is dominated by the higher rate torsion bar.

Poly bushings are a viable option for many reasons - particularly when racing to take compliance (deflection)and therefore steering resonse delays out of the vehicle. While this is great for track use, it will degrade noise and will lead to a bumpier, harsher ride quality. Likewise hard core racers go for a spherical heim joints to eliminate even the compliance that is present in a Poly bushing.

Some folks find that a switch to poly bushings makes the car less enjoyable on the street.

Evaluate what you want the vehicle to be used for, then choose accordingly.