Save the entries in the form for when you come back later Or clear them entirely Note that this will store the data locally on your computer. Nothing you do is tracked on the grimmjeeper server.

Step 1: Select transmission from the drop down list or, if it's not in the list and you know the gear ratios of your transmission, enter them below. Enter Your Own Numbers Number of forward gears 1 2 3 4 5 6 7 8 9 10 1st Gear x 2nd Gear x 3rd Gear x 4th Gear x 5th Gear x 6th Gear x 7th Gear x 8th Gear x 9th Gear x 10th Gear x Reverse x Manual or Auto with lockup torque converter

Automatic without lockup toque converter Step 2: Select transfer case from the drop down list or, if it's not in the list and you know the gear ratios of your transfer case, enter them below. None High Range - Low Range - Low 2 Range - Step 3: Select underdrive. None High Range - Low Range - Step 4: Enter axle gear ratio. Step 5: Select tire size. Inch mm Revs per mile P-Metric 125 135 145 155 165 175 185 195 205 215 225 235 245 255 265 275 285 295 305 315 325 335 345 355 365 375 385 395 / 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 R 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 The following chart lists the final drive ratio of all combined gears (transmission, transfer case, underdrive, axle) in all possible combinations Final Drive Ratio Gear Underdrive Hi Underdrive Lo TC HI TC LO1 TC LO2 TC HI TC LO1 TC LO2 1 - - - - - - 2 - - - - - - 3 - - - - - - 4 - - - - - - 5 - - - - - - 6 - - - - - - 7 - - - - - - 8 - - - - - - 9 - - - - - - 10 - - - - - - R - - - - - - The following chart lists the crawl speed you will be going while the engine is at a given RPM. Crawl speed is calculated based on the lowest low range (transfer case and underdrive in low range) available in your rig. Crawl speed at given RPM in feet per minute and miles per hour Gear RPM RPM RPM FPM MPH FPM MPH FPM MPH 1 - - - - - - 2 - - - - - - 3 - - - - - - 4 - - - - - - 5 - - - - - - 6 - - - - - - 7 - - - - - - 8 - - - - - - 9 - - - - - - 10 - - - - - - R - - - - - - The following chart lists the road speed you will be going while the engine is at a given RPM. Road speed is calculated based on the transfer case and underdrive being in high range. Road speed at given RPM in miles per hour Gear RPM RPM RPM 1 - - - 2 - - - 3 - - - 4 - - - 5 - - - 6 - - - 7 - - - 8 - - - 9 - - - 10 - - - R - - - The following chart lists the RPMs your engine will be turning while driving at a given speed. Road RPMs at given speed in miles per hour Gear 1 - - - 2 - - - 3 - - - 4 - - - 5 - - - 6 - - - 7 - - - 8 - - - 9 - - - 10 - - - R - - -