Performance Differential Ring and Pinion (12, 12)

2570
147237
147238
147239
2572

Motive Gear Performance ring and pinions are perfect for dedicated racing or off-road vehicle. Our gear sets are made from first-run steel, we never use recycled metal. This allows Motive Gear Performance ring and pinions to handle the extreme torque from high horsepower racing engines. Extensive engineering, computer controlled heat treatment, superior strength, quality and the widest selection of racing gear ratios, makes Motive Gear Performance ring and pinions the clear winner! Engineered to the highest standards, every Motive Gear Performance product goes through rigid quality control processes in our in-house lab. Motive Gear Performance: What the pros run!

G888390 Application Notes

Warranty

2 Years or 100,000 Miles

G888390 Specifications

App Model GM 8.875 Car
Cover Bolt Quantity 12, 12
Differential Carrier Break 3.07 to 3.73 Ratio, 3.07 to 3.73 Ratio
Differential Case Design Type GM 8.875 Car, GM 8.875 Car
Gear Ratio 3.90, 3.9
Pinion Gear Tooth Quantity 10, 10
Pinion Shaft Diameter 1.625 (Inch), 1.625 (Inch)
Pinion Spline Count 30, 30
Position Rear
Prop 65 Long Label WARNING: Reproductive Harm - www.p65warnings.ca.gov
Prop 65 Short Label WARNING: Cancer - www.p65warnings.ca.gov
Prop 65 Y N N
Ratio 3.90
Ring Gear Bolt Quantity 12, 12
Ring Gear Material 8620 Steel, 8620 Steel
Ring Gear Outside Diameter 8.875 (Inch), 8.875 (Inch)
Ring Gear Rotation Standard, Standard
Ring Gear Tooth Quantity 39, 39
Taxonomy A LD Differential, LD Differential, LD Differential, LD Differential
Taxonomy B Ring and Pinion, Ring and Pinion, Ring and Pinion
Taxonomy C Rear, Rear, Rear
Taxonomy D 3.90, 3.90, 3.90
Where to buy

Vehicle Applications

  • 1969 – 1972 Pontiac Firebird

Installation

Installation Instructions
⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov