differential windup and damage

[Bluemaxww1 at aol.com]

You could take a gander at page 16 in this document from yokohama  tires:
 
_http://www.yokohamatire.com/pdf/truckBusRefGuide.pdf#search=%22yokohama%20fle
et%20truck%20differential%20damage%20tire%20size%20diameter%22_ 
(http://www.yokohamatire.com/pdf/truckBusRefGuide.pdf#search="yokohama%20fleet%20truck%20dif
ferential%20damage%20tire%20size%20diameter") 
 
There may be more on a google search.
 
Greg W.
 
 
 
 
 
In a message dated 10/11/2006 1:53:04 PM Pacific Standard Time,  
audi at humanspeakers.com writes:

> The  theory is this, and proven on Semi trucks and other large trucks such 
a   
> Dumps, Haulers, etc.,  different diameter tires, such as one  worn and one  
new 
> tire of the same size, cause the axles to  rotate at different speeds.   
This 
> puts undo pressure on  both sides of the diff.  This will  eventually cause 
the 
>  diff to fail.  Not urban legend.  The same will  happen in a  car.

How long would you need to drive in a circle (or oval...) to do  any harm?

> The report on the trucks was in a maintanence magazine  for fleet  
companies.  
> Our Utility followed the advice, and  the diff failure rate went  down 52%. 
 
> Savings in the first  year of replacing pairs, or in some cases,  quad 
tires, 
> was  close to 1M.  The rear tires not worn out enough were  simply used  on 
the 
> fronts as replacements.

There must be documentation of  this somewhere.  That's usually the 
difference between urban  legend/rural folklore/"street knowledge" and 
facts.  I realize it  might not be on the www, but surely there is 
something  authoritative.  $1M a year savings usually come with some 
paperwork,  I'd imagine.

So far, all that I can assert is still that "I heard it  somewhere".

-- 
Huw Powell