To add injury to insult, I was tracing a malfunctioning temp. guage, tightening grounds, etc. under dash. and later found out on the road, that i had inadvertently bumped some of the dip switches on back of the speedo! it registers way off....(and the temp guage is still not working) It is a beedle, and i have downloaded the install instructions as beedle instructs, but how do i find out the axle ratio, and all the pertinent details. or if anyone has calibrated one like this, maybe the settings are the same. 2002 HR endeavor roadmaster chassis 275 22.5 radials. help!!