# What is the gear ratio in the rear differential of a 1991 gmc jimmy s15?

the only way i fount that was take id number to Chevy dealer and they give you a print out of every thing that came on your vehicle.including differental gear ratio.

### What is the differential gear ratio in a 89 s15 jimmy?

There are four ways to find a ratio. 1 A dealer can normally tell from the vin number. 2 There are normally tags or labels on the axle that have part number, gear ratio, and fluid requirement info. 3 You can count how many times you have to turn the driveshaft to get one complete turn of the tires. 4 You can divide the number of teeth on the ring gear and divide by number…

### What is the differential gear ratio of 1991 F150 lariat?

There are four ways to find a ratio. 1 A dealer can normally tell from the vin number. 2 There are normally tags or labels on the axle that have part number, gear ratio, and fluid requirement info. 3 You can count how many times you have to turn the driveshaft to get one complete turn of the tires. 4 You can divide the number of teeth on the ring gear and divide by number…

### Can you measure the speed of a car by ratio?

Yes. To do so, you will need your transmission gear ratios, your differential gear ratio and your tire circumference. You can derive the tire circumference by mutliplying its diameter by 3.1416 (pi). Example: At highway speed your RPM is 2000. Say your overdrive (5th gear) is 0.84:1, your differential gear ratio is 3.73:1 and your tire circumference for a P215/75R15 is 87". First divide the RPM by the first ratio (.84) which gives you 2380…