Speedometer Calibration REV
Go to your Holden Dealership
to change you PPK to the following
(Pulses Per Kilometres)
Original Diff ratio in
Automatic is 3.07
Original Diff Ratio in Manual 3.46
Diff you can change to
Auto 3.46, 3.73
Diff you can change to Manual 3.73, 3.91
First ask your Holden Dealer to see what PPK
are on you car, via the Tech
2, note the number down.
Say you get
6301, next divide with the Original Diff Ratio,
say is was
6301/3.07 = 2052.442996742671009771986970684
Next we need to multiply with the New Diff Ratio, say 3.73
2052.442996742671009771986970684 x 3.73 =
just make it 7655
As the car
computer limit is 7500, it is the limit you
can adjust the PPK's.
So enter 7500.
is limit to 21% so a 3.46 you would be
able to get it spot on.
try it now.
want to installed a
3.46 diff in your Auto which
has a 3.07 diff
Next get your need to check what PPK's you have Original before
Here is the list below look up your car with what diff you have.
Say it is
Next we need to divide the
6301 ppk with the Original Diff Ratio 3.07
Next we need
to multiply with the NEW Diff ratio.
2052.442996742671009771986970684 x 3.46 = 7101.4527687296416938110749185668
Just make it
this is the NEW PPK's number to be entered into the computer via
the Tech 2
to a Holden Dealer about the PPK's setting using this method,
and found some car's have got different PPK's from factory
Because of different tyre size, just use this equation, and don't
forgot to make sure you use the Original PPK's via Tech 2.
take any responsibility for any misleading information, please
check your speedo on a dyno.