Thread: Poly bushes don't flex, do they..

The downside is, you'll never have to change them.

My front poly bushes have done about 9 years and 100,000km.

Very interesting. Do the polys misalign ala your 1st pic?

When jacking under the radius arm with the holeys, you can watch the bush compress before lifting starts..

Regards
Max P

you know you can get poly bushes that are as hard as plastic to ones softer than rubber.......?

they come in different grades......but not for all applications.......

My understanding of poly bush,s is they transfer more stress to your chassis (chassis cracking can happen) but ive never seen this first hand
But you own a 130 so it could happen any way

Originally Posted by rangieman

My understanding of poly bush,s is they transfer more stress to your chassis (chassis cracking can happen) but ive never seen this first hand
But you own a 130 so it could happen any way

I'd believe that!
Some idiot fitted my Disco with plastic front shock absorber units. The "Jarring" gave met the Sh*ts.

Yesterday I bought a complete set of rubber ones from MR Auto. Oh boy, what a difference . No more jarring over bumps in the road. The Disco is now almost as smooth as the Jaguars, well...... better than it was

Originally Posted by rick130

here's a couple of quick flex shots after a front end bush change this week.

First up, flogged out slotted bushes. *Note, I'm not knocking these bushes, they are just at the end of their useful life.





now, the new bushes



which look like this






the 17" spring was just starting to dislocate with each set



and the wheels were still on terra firma, with about 1/4"-1/2" droop left in the shock.

Not overly accurate, but it has allayed my fears that I was going to bind up the front end.
What appears to be happening is that with the urethane bushes the radius arm chassis pin is rotating in it's mount, unlike the rubber ones that 'grab', and so rely on distortion of the arm/diff bushes for flex.

Yes, the new bushes are Fulcrum/Super Pro

your preaching to the converted here! well me anyway
been saying they flex for a while now.
full super pro bushes, cept the shock's they are still rubber.


cheers phil

You'll no doubt find that it has to do with the grade of poly that they used, rather than it actually being poly the material. I suspect that most street vehicles that have poly run a hard grade for steering precision, and that same grade used in high articulation 4WD's is what has given it a bad name amongst us. If the Superpro is flexing like a slotted bush, then it is going to be softer than rubber again.

Originally Posted by Tusker

Very interesting. Do the polys misalign ala your 1st pic?

<snip>

Regards
Max P

not really, I think I have a pic somewhere.....