Re: speedo error and how to fix?
On Fri, 4 Mar 2005 16:39:01 -0500, "Matt Macchiarolo"
> Note that
>> it is important that this be accurate if you have antilock
>> brakes or traction control for them to work correctly.
>Not really...the ABS/TC senses the difference in speed between wheels, and
>doesn't care how big the tire/wheel combination is as long as all 4 wheels
>are the same.
>But, the OP's tranny won't shift right until the speedometer is corrected,
>and his odometer will be off as well.
>Either it has to be reprogrammed for your tire/wheel combination, or you can
>get a Superlift Truspeed unit, which corrects the signal.
I put one of those units on my Superduty when I put the 35's on it.
Easy to install, PITA to get dialed in by yourself.. Lots of little
adjustments and test drives with my GPS receiver finally got it
The "ballpark" settings the instructions show are pretty close tho.