[DeTomaso] Oscillating vibration

[Tomas Gunnarsson]

Hardy discs are often used on IRS cars as the driveshaft doesn't have to move around when the diff housing is bolted to the body. U-joints don't work well unless they get to move their roller bearings around a little and wear out prematurely I've heard. My old Alfa had a Hardy disc at the gearbox output, which doesn't "bend", but U-joints in the other two positions. My Mercedes has them front and rear but surprisingly the center joint is a U-joint.

Tomas

----- Original Message ----- 
From: "Thomas Tornblom" <Thomas.Tornblom at hax.se>
To: <MikeLDrew at aol.com>
Cc: <Thomas.Tornblom at hax.se>; <JDeRyke at aol.com>; <detomaso at realbig.com>; <guson at home.se>
Sent: Monday, August 27, 2007 9:54 PM
Subject: Re: [DeTomaso] Oscillating vibration


> MikeLDrew at aol.com skrev:
>> 
>> In a message dated 8/27/07 12 17 43, MikeLDrew writes:
>> 
>> 
>>>
>>> And FWIW, the GT40 used a U-joint on one end of the driveshaft, and a 
>>> Metalastic Rotoflex coupling on the other end.
>> 
>> 
>> ...and in case you don't know what that looks like, here's one:
>> 
>> http://www.leechapmanracing.com/images/donut_3.78.gif
> 
> BMW appears to be using these on their drive shafts. Apparently called 
> Hardy discs.
> 
> Old saab two strokes used a similar inner joint, but had what looked 
> like meshing huge wing nuts stuffed into a rubber disk, and encapsulated 
> in a steel housing. They were only 42 bhp max though.
> 
> 
>> 
>> Mike
> 
> Cheers,
> Thomas
>