Fred C. Dobbs <nus DeleteThis @tenretni.moc> wrote in
news:b88t44t47k6tt9h707pcc7ccoebp2l4vh6@4ax.com:
> On Tue, 10 Jun 2008 05:28:30 -0500, AlexZ <alexz DeleteThis @no.spam> wrote:
>
>>A local dealership is offering "all wheel alignment" for $68. Does this
>>include what is more traditionally called "front end alignment" and
>>often costs similar amount? Thanks.
>
>
> In addition to Front wheel alignment , All wheel alignment includes
> alignment of the rear wheels also. hence the name all wheel
> alignment. Depending on the type of equipment used to align the
> vehicle sensors are place on all four wheels. The "Rack" that the
> vehicle is aligned on has Turn plates in the front and Slip plates in
> the rear. The turn plates in the front allow the turning of the wheels
> during the alignment process to take readings in the full left and
> right steering positions. The rear slip plates allow the rear wheels
> to settle in their normal position so proper readings can take place.
> Two wheel alignment only aligns the front wheels to an imaginary line
> parallel to the body of the vehicle and not to the rear wheels. If the
> rear wheels are off slightly the vehicle will not track properly as it
> drives down the road. |-- |
> | --|
>
> All wheel alignment corrects that by aligning the front wheels and
> the rear wheels together.
>
More exactly, for an independent rear-end FWD car (view in fixed-width
font)...
Front wheels properly aligned to thrust line as established by a dead-
straight rear wheel alignment relative to car body:
\ -
--+----front
/ -
Front wheels to left of thrust line as established by rear wheels. Steering
wheel needs to be turned to right to make car drive straight. Front needs
to be adjusted to compensate for offset rear thrust:
\ -
-------front
- + -
Most cars dog-track to some degree. This does not necessarily mean the
wheels are misaligned. There are a few vehicles that have rear toe
adjustment available only on one wheel, so in those cases dog-tracking is
unavoidable.
--
Tegger
>> Stay informed about: Does "all wheel" alignment include "front end" alignment?