speedometer recalibration

I've changed the tires on my F250 4WD 2000 SuperDuty from
LT285R75-16's to LT325R80-16's. The Speedometer was accurate before
and is about 15 percent off now. Ford said my tires are too big for
them to recalibrate my speedometer. (they are 36.5inches in diameter
and the limit is 35) I've heard about a device called Tru-Speed that
changes this but several people have told me that it is not very
accurate. (not to mention that it's almost $200!) I've got a western
diesel chip installed so changing to something like a hypertech would
be very expensive too.
So anyone have any suggestions as to how I can recalibrate my
speedometer?

thanks,

Robert
If time is the 4th dimension, then money is the 5th dimension.
We are always concerned about dollars per hour for the space we occupy.
- Rod White

Take a look at this site.

www.terf.com


On Mon, 22 Mar 2004 03:12:23 GMT, Dies Deambulo <[email protected]>
wrote:

>I've changed the tires on my F250 4WD 2000 SuperDuty from
>LT285R75-16's to LT325R80-16's. The Speedometer was accurate before
>and is about 15 percent off now. Ford said my tires are too big for
>them to recalibrate my speedometer. (they are 36.5inches in diameter
>and the limit is 35) I've heard about a device called Tru-Speed that
>changes this but several people have told me that it is not very
>accurate. (not to mention that it's almost $200!) I've got a western
>diesel chip installed so changing to something like a hypertech would
>be very expensive too.
>So anyone have any suggestions as to how I can recalibrate my
>speedometer?
>
>thanks,
>
>Robert
>If time is the 4th dimension, then money is the 5th dimension.
>We are always concerned about dollars per hour for the space we occupy.
> - Rod White

--
Elbridge Gerry, of Massachusetts:

"What, sir, is the use of militia? It is to prevent the
establishment of a standing army, the bane of liberty. . .
Whenever Government means to invade the rights and liberties of
the people, they always attempt to destroy the militia, in order
to raise a standing army upon its ruins." -- Debate, U.S. House
of Representatives, August 17, 1789