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Vehicle Info NeededMOTIVE GEARPART NUMBER: 683-GM12-308
Ring & Pinion Gears Ratio: 3.08
$29599
Ships on 09/14/2026
Lowest Price GuaranteeGM 8.875" 12-Bolt
- Ring & Pinion Gears
- Ratio: 3.08
- Teeth: 40-13
- For GM 8.875" Truck
- Ring Gear Diameter: 8.875"
- Pinion Shaft Diameter: 1.438"
- Standard gear rotation
- Pinion Spline Count: 30
- Cover Bolts: 12
- Ring Gear Bolts: 12Applications:
- 1964-81 1/2 & 3/4-Ton Truck/G10, G15
- 1969-81 G20, G25
- 1964-82 K10, K15, C10, C15
OEM-Quality Ring and Pinions
Motive Gear Ring & Pinion Gears are the differential's critical point of power transfer and one of the easiest performance modifications to complete on a vehicle. Motive's high-quality Ring & Pinion Gears are made from 8620 steel for superior strength and come in a range of ratios, making them excellent factory replacements for both on-street and off-road vehicles.
Part TypeRing and Pinion
Product LineMotive Gear Ring & Pinion Gears
BrandMOTIVE GEAR
Package Height6.4
Package Width11.0
Package Length15.1
Weight15.33 PG
Part CategoryPerformance Parts
Ring Gear RotationStandard
Ring Gear Tooth Quantity40
Differential Carrier Break2.76 to 3.42
Cover Bolt Quantity12
Pinion Spline Count30
Ring Gear Material8620 Steel
Ring Gear Diameter8.875 in (225.4 mm)
Pinion Shaft Diameter1.438 in (36.5 mm)
Pinion Gear Tooth Quantity13
Axle TypeGM 8.875 in.
Ring Gear Bolt Quantity12
Part FitmentSemi Universal
Vendor Part NumberGM12-308
Package Qty1
Package TypeEA
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