Differential Setup Specifications
The following are recommended differential setup specifications for popular differentials. For ring and pinions with dual ring gear bolt patterns, use the following recommended preload:
- 3/8” Bolts = 55 FT/LBS
- 7/16” Bolts = 75 FT/LBS”
- 1/2" Bolts = 135 FT/LBS
| Model | Suggested Starting Pinion Depth (IN) | Pinion Bearing Pre-load (INCH/LBS) | Backlash 5-Cut | Backlash 2-Cut | Ring Gear Bolt (FT/LBS) | Bearing Cap (FT/LBS) |
|---|---|---|---|---|---|---|
| GM | ||||||
| 55P/55T | 0.026 | 14-18 | .006 - .010 | 55 | 60 | |
| 7.5"-7.6" | 0.035 | 12-15 | .006 - .010 | 65 | 60 | |
| 8.2" | 0.03 | 12-15 | .006 - .010 | 55 | 60 | |
| 8.25" IFS | 0.037 | 14-19 | .006 - .010 | 65 | 55 | |
| 8.5"-8.6" | 0.037 | 14-19 | .006 - .010 | .004 - .007 | 65 | 60 |
| 9.25” | 0.032 | 15-22 | .006 - .010 | 65 | 55 | |
| 9.5" | 0.03 | 15-22 | .006 - .010 | 75 | 80 | |
| 10.5" | 0.017 | 20-35 | .006 - .010 | 120 | 135 | |
| 11.5" | 0.055 | 20-30 | .006 - .010 | 175 | 200 | |
| 12P | 0.03 | 14-19 | .006 - .010 | 55 | 60 | |
| Chrysler | ||||||
| 8.25" | 0.03 | 12-15 | .006 - .010 | 55 | 60 | |
| 9.25” | 0.032 | 14-19 | .006 - .010 | .004 - .007 | 65 | 75 |
| 9.25" ZF | 0.065 | 17-22 | .006 - .010 | .004 - .007 | 165 | 100 |
| 9.25” AAM Front | 0.035 | 15-25 | .006 - .010 | .004 - .007 | 100 | 60 |
| 11.5” | 0.055 | 20-30 | .006 - .010 | 175 | 200 | |
| AMC | ||||||
| 20 | 0.095 | 14-19 | .006 - .010 | 65 | 65 | |
| Dana | ||||||
| D30 | 0.065 | 12-15 | .006 - .010 | 55 or 75 | 60 | |
| D30JK | 0.065 | 12-15 | .006 - .010 | 55 or 75 | 60 | |
| D30JL (M186) | 0.05 | 15-20 | .006 - .010 | 70 | 70 | |
| D35 | 0.045 | 12-15 | .006 - .010 | 55 | 55 | |
| D35JL (M200) | 0.045 | 12-19 | .006 - .010 | 135 | 50 | |
| D44 | 0.042 | 14-19 | .006 - .010 | 55 or 75 | 60 | |
| D44HD | 0.042 | 22-35 | .006 - .010 | 125 | 80 | |
| D44JK | 0.042 | 22-35 | .006 - .010 | 75 or 135 | 80 | |
| D44JL (M210) | 0.045 | 14-26 | .006 - .010 | .004 - .007 | 135 | 70 |
| D44JL (M220) | 0.045 | 12-19 | .006 - .010 | .004 - .007 | 135 | 70 |
| D60 | 0.052 | 17-30 | .006 - .010 | 110 | 80 | |
| D70 | 0.061 | 22-35 | .006 - .010 | 110 | 80 | |
| D80 | 0.06 | 25-40 | .004 - .010 | 175 | 90 | |
| Ford | ||||||
| 8.8" | 0.026 | 14-19 | .006 - .010 | .004 - .007 | 60 | 60 |
| 9" | 0.022 | 13-15 | .006 - .010 | 60 | 60 | |
| 9.75" | 0.027 | 15-19 | .006 - .010 | 75 | 70 | |
| 10.25" / 10.5" | 0.025 | 20-35 | .006 - .010 | 95 | 80 | |
| Toyota | ||||||
| 7.5" F/R | 0.095 | 12-15 | .006 - .010 | 70 | 70 | |
| 8" F/R | 0.074 | 12-15 | .006 - .010 | 70 | 70 | |
| 8" IFS | 0.07 | 9-14 | .006 - .010 | 70 | 70 | |
| 8.2” | 0.068 | 14-17 | .006 - .010 | 65 | 70 | |
| 8.4” | 0.085 | 14-17 | .006 - .010 | 70 | 70 | |
| 8.75” | 0.076 | 15-20 | .006 - .010 | 70 | 70 | |
| 9” Reverse | 0.08 | 20-30 | .006 - .010 | 100 | N/A | |
| 9.5" TLC | 0.02 | 8-11 | .006 - .010 | 100 | 75 | |
| 9.5” | 0.048 | 9-15 | .006 - .010 | 100 | 75 | |
| 10.5” | 0.048 | 16-28 | .006 - .010 | 145 | 150 | |
| Suzuki | ||||||
| Samurai | 0.055 | 45641 | .006 - .010 | 70 | 70 | |
| Nissan | ||||||
| H233B | 0.098 | 15-23 | .006 - .010 | 100 | 70 | |
| M205 | 0.06 | 15-20 | .006 - .010 | 100 | 40 | |
| M226 | 0.042 | 15-25 | .006 - .010 | 100 | 70 |