I had a question about odomoters. When putting on bigger tires than what comes stock, is it necessary to change the odomoter settings so that the increased wheel travel dosen't throw off your speed/mileage? And is it an adjustment that I could make myself?

Thanks.

After putting on larger tires, the speedo and odometer will show less than actual, that is 45 MPH on the speedo is actually 55 MPH and 2 miles on the odometer is actually 2.5 miles (just to throw out some numbers). On the older trannies, its a matter of changing the speedo gear to correct this. In newer vehicles it requires a new chip in the computer with the correct programming for the larger tires. Or you can be like me and do nothing about it. I enjoy that the odometer is not racking up miles as fast as it should.

The jeep I bought hadn't had a working speedo/odometer in 10 years, so I'm not too worried about it. A new speedo is on the way to me, but I'm probably not going to bother correcting it. Just not worth the hassle.

Is it possible to change the speedometer gear on a Dana 20?