If you do not know the axle ratio of your vehicle, check its Truck Safety Compliance Certification Label (located on the left front door lock facing or the door latch post pillar). Below the bar code, you will see the word AXLE and a two-digit code. Use this chart to find the axle ratio that corresponds to that code:
- Axle Code 71 = 3.73 Gear Ratio (Non-Limited Slip)
- Axle Code 73 = 3.73 Gear Ratio (Limited Slip)