On Thu, 26 Aug 2010 14:00:16 -0400, Archon
wrote:
>On 8/26/2010 8:57 AM, Airport Shuttle wrote:
>> Replace the two and make the good tire your spare. I would recommend if
>> you have a vehicle that must have the same tread style and depth put all
>> five tire in rotation so if you have this problem the spare is ready to
>> go.
>>
>>
>Hi Thanks for the reply, I know how to solve the problem although I'm
>going to be in for 2 tires, but my question is Why? what is the reason
>for any adverse effect on the drivetrain? I thought someone would maybe
>have great insight into what the detrimental effects would be.
>
>Regarding using the spare in rotation, in an ideal world yes, but in
>most cases when buying a used vehicle the spare is often a different
>brand, almost always unused and often obsolete.
OK I'll explain it.Traction control and antilock braking, and to a
lesser degree, Stability control, work by sensing wheel rotation
speed. A bigger tire (un-worn) turns slightly slower than the smaller
tire at the same speed - so the ABS thinks that tire is starting to
lock up, and traction control thinks it's the tire with the best
traction. Hard on brakes when traction control brakes the other 3
wheels it thinks are spinning.
Also, different sised tires on the same drive axle makes the
differential constantly "work" and with Limited Slip (or Posi-Traction
as it used to be called) there can be issues with the diff locking,
trying to keep both wheels going the same speed.
With All Wheel Drive, a difference between front and rear wheel
diameters has the same effect on the inter-axle differential if so
equipped, and on the transfer case. Just more wear and tear all around
- both on the differentials, transfer case, and tires
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
|
