looking into some rear control arms, uppers and lowers, what are the pros and cons of spherical or poly bushings, and adjustable as opposed to non adjustable uppers????????
rear ctrl arms, spherical or poly, adjustable or not?????
- Thread starter white_97_GT
- Start date
Spherical bearings will transmit noise & vibration back into the car. They are best suited for track/strip usage because the dirt & moisture accquired from daily driving is very bad for the bearing.
However in a track/strip only car they can't be beat for positive, no bind alignment.
However in a track/strip only car they can't be beat for positive, no bind alignment.
jrichker said:
thats what i was worried about, im told the poly bushings are fine so long as you grease them regularly
Maryland Stang
Active Member
dastang2 said:
They make a spherical bushing lube. I saw it online at Summit. It's a spray that would be better suited for the job than grease.
jrichker made mention of the noise that can be transmitted. He ain't lying. My 5.0 has always made a creaking noise in the right rear of the car. Ever since I installed my spherical bushings the noise is much louder and more pronouced. And yes, we are trying to find the cause with no luck so far.
04sleeper
Founding Member
What do you guys know about Delrin bushings? What are they and how are they different?
--also--
With the noise transfer you get with Sperical bushings:
What do you guys think about those lower control arms that come with spherical bushings at one end and either 3 pc or Delrin bushings at the other end?
--also--
With the noise transfer you get with Sperical bushings:
What do you guys think about those lower control arms that come with spherical bushings at one end and either 3 pc or Delrin bushings at the other end?
Blown88GT
Founding Member
Delrin = low friction; and requires no lubricant
It's a very hard plastic which machines not unlike aluminum.
04sleeper
Founding Member
Delrin is supposed to be very good because you don't have to lubricate it like mentioned and is supposed to be like poly in noise.
The lower control arms with spherical at one end and anything other than spherical are usless in my book. They still transmit all the noise as spherical on both ends but you don't get the benifit of travel.
I'm not sure why they sell these because they are a waste IMHO.
Either all poly/delrin or all spherical, but not both.
I noticed the question also asked about aadjustable vs. non adjustable...I believe the biggest benefit of adjustable is you can set pinion angle and where your four link intersect point is on the car (useful for tuning the suspension) if you dont plan on chaning ride height or anything you could probabaly get away with fixed (non adjustable) control arms but if you plan on tracking it or any performance application then you would want adjustable for sure.
I don't get it either. Seems like the higher end companies offer this option. Does anyone know anything about Steeda'a 3 piece bushing?
They are one of the companies that offer the spherical on one end and then this 3 piece bushing on the other. They say that it eliminates the bind.
thehueypilot
Active Member
I used delrin in my leaf springs on my 68 to replace the aluminum bushings. The delrin is a very tough plastic and does not transmit noise like the aluminum bushings. The aluminum bushings are very noisy on the street. My 93 lowers have a sperical bearing on one end and ploy on the other end. I chose it because I did not want the metal to metal joint on both ends. I also wanted to adjust the rear wheel to be centered in the wheel housing. I am hoping it won't tear my mounting points off the frame as quick since the poly gives a little at one end. My 60' does not look like it is suffering because of the poly joints so far.
04sleeper
Founding Member
I will tell you about the Famous "3 Peice Bushing".
When Dario Orlando (Owner) first started making control arms he put in an order with Prothane for bushings in a special size to fit his new arms that he was having built to sell.
He miscalculated the size and ordered them.
Because they were not a current size that Prothane carried in stock they had to custom make them and Steeda ended up eating them.
Instead of throwing out the bushings because they were the wrong size Dario ordered more bushings to take up the space of the wrong size bushing.
With his marketing prowness he introuced the "NEW" 3 peice bushing and marketed it as the best thing EVER.
Not to many people knew the real truth of the matter so it was just a way for him to turn lemons into lemonade.
There is nothing special about the 3 peice bushing other than a covered up mistake.
Black Sun 5.0
Founding Member
So wait, you're trying to say that there is no benfit to the 3-piece bushing and it's just an ongoing sham? According to MM, they use it to reduce the stress on your torque boxes. That can be such a bad thing, can it?
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