[DeTomaso] [POCA Forum] A-ARM BUSHINGS (Pantera Technical)

[cengles at cox.net]

Dear Julian,


                  Over twenty years ago, I had squeaky poly bushings. 
They were PPC.  Back in the Plesitocene era, poly bushing were put in 
with stone tools and no lubricant.  It was not known.   Then, it was 
discovered that they squeaked.

                   After I installed some zerk fittings and greased 
them, the squeak is gone.  I remember to re-grease about once every 2-3 
years.  No squeaking in the modern era.


                           Warmest regards, Chuck Engles

PS: I think the squeaking poly bushing problem is overblown in this day 
and time......


On Fri, May 1, 2015 at 8:17 AM, Julian Kift wrote:

> This begs the question are all the vendors polyurethane offerings the 
> same? I have poly bushing and can't remember when I last greased 
> everything, but never had any squeaks.
>  Julian
>
>> From: demongusta at me.com
>> Date: Fri, 1 May 2015 01:22:05 -0700
>> To: mbefthomas at comcast.net
>> CC: deTomaso at POCA.com
>> Subject: Re: [DeTomaso] [POCA Forum] A-ARM BUSHINGS (Pantera 
>> Technical)
>>
>> Ah yes, life is but a trade-off. Stiff and squeaky or softer and 
>> quiet, The older you get, the more you like the latter.
>>> On Apr 30, 2015, at 8:20 PM, Mike Thomas <mbefthomas at comcast.net> 
>>> wrote:
>>>
>>> I have a set of the original style bushings, but as I'm running an 
>>> offset
>>> set in the front for more caster, and the shims are all forward, I'd 
>>> lose
>>> some of the caster by going back to the stock bushings.
>>>
>>> I am getting awfully tired of the squeaking . . . .
>>>
>>> Mike Thomas
>>>
>>> -----Original Message-----
>>> From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of Mike 
>>> Drew via
>>> DeTomaso
>>> Sent: Wednesday, April 29, 2015 2:12 PM
>>> To: demongusta at me.com; sjcarguy60 at yahoo.com
>>> Cc: deTomaso at POCA.com
>>> Subject: Re: [DeTomaso] [POCA Forum] A-ARM BUSHINGS (Pantera 
>>> Technical)
>>>
>>>
>>> In a message dated 4/29/15 12 34 27, demongusta at me.com writes:
>>>
>>>
>>>>      What is the main advantage of the Poly A-arm bushings? If they 
>>>> are
>>>>>      replaced with the stock rubber, I assume you would not have 
>>>>> the
>>>>>      squeaking, correct.
>>>>
>>>
>>>>>> Interesting--I never saw this original message, or John Donahue's
>>> response, or Dennis' response to that; the only thing that came 
>>> through is
>>> John's subsequent reply.   Is this something that bled over from a 
>>> web-based forum perhaps?
>>>
>>> As to the question above--the principal selling point of poly 
>>> bushings is
>>> that they offer less compliance (which is what bushings are for in 
>>> the first
>>>
>>> place).   They are favored by racers and autocrossers (back in the 
>>> day, race
>>>
>>> Cobras came with solid metal bushings, yow!).   The main advantage 
>>> they used to have over factory bushings was greatly reduced cost.
>>>
>>> Drawbacks are many, however.   As you mentioned, they can squeak 
>>> something awful if they aren't properly (and routinely) lubricated. 
>>> (People often fail to lube the outside ends of the bushings, which 
>>> is where most of the squeaking happens).   Too, they can deliver a 
>>> somewhat harsher ride, and
>>> fail to absorb road shocks as well, transmitting them through the 
>>> body instead.
>>>
>>> Now MaseratiSource sells stock-style bushings at a very affordable 
>>> price, making them competitive with poly bushings.   I vastly prefer 
>>> stock-style bushings for a variety of reasons.
>>>
>>> Getting the old ones out is time-consuming and labor-intensive, but 
>>> not especially difficult.   Using a sawzall (you can use a hacksaw 
>>> but it would take forever), you cut the large end off the bushing. 
>>> Then you use a just-large-enough deep well socket on one side, and a 
>>> just-small-enough
>>> socket on the other, put the whole affair in a vice and compress it; 
>>> the
>>> small socket should be small enough to fit inside the A-arm tube, 
>>> and the
>>> large one large enough to accept the bushing as it is pressed out of 
>>> the
>>> A-arm.
>>>
>>> My wife Lori changed all 16 of her bushings herself, once the 
>>> process was
>>> demonstrated, so you can definitely do it too! :>)
>>>
>>> Mike
>>>
>>
>>
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