Keith Browning Posted November 29, 2005 Share Posted November 29, 2005 Not long ago I responded to a post over on TDS about reconfiguring the instrument cluster to reflect over sized tires. It prompted me to write " calculating tire revolutions per mile " because once again, I could NOT find the instructions in the service manual to refer to. I eventually found the procedure and the formula as you can see. I'll also note that I "asked Ernie" on the PTS web site and did find the answer and a link... which required that my PC has Microsoft OfficeXP installed for "IT" to work. I assume it was an RPM calculator.Grampy Jim wanted to know the secret to getting the newer trucks to take the non listed number. I had troubles configuring a 2004 as well. When I entered the RPM's I calculated into the WDS it would not take in one instance and I think it was because I was trying to enter a p-metric tire (Toyo's to be exact) and the RPM value only . Since I knew the RPM for the tire, I tried fudging the numbers. My guess is that WDS wants values for Section Width, Aspect Ratio and Wheel Diameter - not just RPM. I tried fudging those values by entering the ones I knew and adjusting the Section Width until WDS's calculated tire RPMs matched (or were very close to) my calculated RPMs. I recorded these numbers, turned the ignition off and closed the vehicle session. Restart a new vehicle session and enter Module Programing, select Programmable Parameters and then Other. Enter the numbers and proceed.It worked for me. Quote Link to comment Share on other sites More sharing options...
Jim Warman Posted December 4, 2005 Share Posted December 4, 2005 I'll give that a try at the next opportunity and let you know how it goes. I'm getting too old for this computer crap..... It's almost enough to turn me Amish.... Quote Link to comment Share on other sites More sharing options...
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