8.5” GM 3.73 Ratio 70124

Allstar Performance ALL70124 Ring & Pinion – GM 8.5" 10-Bolt, 3.73 Ratio

Allstar Performance ALL70124 is a 3.73:1 ring and pinion gear set for GM 8.5"/8.6" 10-bolt rear ends. Built from premium alloy steel and lapped in matched sets, it’s designed for quiet operation and long life in street, strip, or off-road builds using a 3-series carrier.

• Brand: Allstar Performance

• Part Number: ALL70124

• Product Type: Ring & pinion gear set

• Axle Type: GM 8.5"/8.6" 10-bolt differential

• Gear Ratio: 3.73:1 (41–11 tooth count)

• Pinion Spline: 30-spline pinion shaft

• Carrier Series: 3-series carrier required

• Material: Premium heat-treated steel alloy for strength and durability

• Finish/Prep: Lapped in matched sets for precise mesh and quieter operation

• Use: Suitable for street, strip, and off-road applications

• Kit Contents: Ring gear and pinion gear set (install kit with bearings/shims sold separately)