Selecting Differential Gears. This chart is from Jeff's Bronco Graveyard. Note it is calibrated for a cruise speed of 55 MPH. If you normally cruise at 65 MPH then the numbers 4 columns to the left are close. For ex . for 35 inch tires at a 65 MPH cruise use the numbers under the column for 31 inch tires. OR, recalculate using the formula above.

Owner caption January 2006 · Photo 59 of 336