Ford 9" 3.91 Lightning Series
Description:
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US Gear Superfinished Ring and Pinion | Ford 9" | 3.91
Specifications
| Material | 8620 - Standard OE Material |
| Ring Gear Diameter | 9.0" |
| Ring Gear Bolts | 10 - 7/16"X20 RH |
| Cover Bolts | N/A |
| Carrier Breaks | N/A |
| Pinion Shaft Diameter | 1.312" |
| Spline | 28 |
| Ratio | 3.91 |
| Tooth Count | 11-43 |
Lightning Series Key Features
- Eliminates Break-in
- Reduces Contact and Bending Fatigue
- Reduces Friction and Wear
- Increases Part Durability
- Improves Pitting Resistance
- Improves Corrosion Resistance
- Reduces Vibration and Noise
- Reduces Lubrication Requirements and Cost
- Extends Component Life
- Reduces Part Failures
- Improves Oil Retention Properties
- Minimizes Overheating
