Bushings- urethane or rubber?

Do Not use red urethane on any mechanical part, the material breaks down, cracks and ruptures, I've seen broken trans mounts and steering column " rag joints  come apart.. The red stuff is dangerous...Why they still sell it is beyond me.

so you are saying this  https://www2.cip1.com/ProductD...3%2D501%2D541%2DCSet

not this  https://www2.cip1.com/ProductD...ode=ACC%2DC10%2D4300  

(used CIP1 as example only)

Is it just the red urethane you have issue with or all for suspension bushing? any experience with this?  https://www.autozone.com/suspe...105g/356110_925795_0

Thanks in advance

I didn't like rubber in the trailing arm and spring plates. The bushings tend to sag after a few years, and the steel parts rub on each other and squeak. I have yellow Prothane bushings in mine, and have had them for several years. I like them a lot.

Your mileage may vary.

I went with the rubber bushings on the rear torsion bars/spring plates and am happy with them.  They work and are very quiet.

I also went with Rhino urethane bushings (they are gray in color) for my front torsion bar bushings, the shift coupler, the transaxle cradle mounts add the transaxle front mount.  I believe that Carey uses Rhino on his builds at Beck.

I used a VW OEM rubber “rag coupler” for the steering coupler.

Everything is great, so far.  🤞

When I had to replace my transaxle nose mount I bought a Rhino Mount from Carey.  You’re right, that’s what he uses now.

I had a dune buggy about 6 years ago with the red bushings, was pulling into wendys when the steering coupler bushing broke into, scared the crap out of me, was headed right for the sidewalk and finally got it stopped, the rest of my ride home was on a roll back, they are dangerous.

The urethane steering coupler should be ILLEGAL to sell. It is the most dangerous thing to have in your car. Use only rubber/cloth steering couplers.

Red urethane motor/trans mounts should also be illegal to sell.

However, when captured, as in a sway bar or torsion bar bushing, urethane works, and works well. That should be the only automotive use.

However, CB makes a Rhino trans mount. They are some sort of TOUGH yellow plastic, and are awesome.  I don't think they are urethane at all. And also they make front torsion bar bushings, which I didn't know.

Sooooo... back to the original question (bushings for the trailing arms and spring plates).  It depends on what kind of car you want. 

Rubber is quiet.  That is about all it has going for it.  Porsche quickly realized this when they started making 911s.  The famous rear end whip around on deceleration while cornering is partially due to the rubber trailing arm bushings.  Because they are soft, when you accelerate they go into a "toe-in" position, which is good for handling.  When you decelerate (let off the throttle), they go into a "toe-out" position, which is dangerous. 

Think about it, the tire wants to go in a straight line.  If the tire is "toe'd out" in the rear it will want to go in the opposite direction you want the car to go.  So if you want your car to handle safely the only choice is urethane.  Just lube them up good and know they will squeak eventually.

(All you doubters, spend some time on Google researching Porsche 911 rear suspension problems).