Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededRICHMOND GEARPART NUMBER: 836-79-0031-1
GM 12-Bolt Pro Gear Ring and Pinion Set Ratio: 5.57
$71170
Ships on 11/06/2026
Lowest Price GuaranteeGM 12-Bolt
- GM 12-Bolt Pro Gear Ring and Pinion Set
- Ratio: 5.57
- Teeth: 39-7
- Designed For Drag Racing
- Richmond's Pro Gear Ring and Pinion Sets are designed to resist breakage under harsh racing conditions. These race only gear sets are manufactured of professional quality, high performance materials and engineered for faster and more reliable performance.
Part TypeRing and Pinion
Product LineRichmond Pro Gear Ring and Pinion Sets
BrandRICHMOND GEAR
Package Height5.4
Package Width11.1
Package Length15.2
Weight16.45 PG
Part CategoryPerformance Parts
Ring Gear RotationStandard
Pinion Gear Teeth7
Ring Gear Tooth Quantity39
Carrier Series4
QuantitySold as a set
Differential Carrier Break3.90 and Higher
Cover Bolt Quantity12
Pinion Spline Count30
Ring Gear Material9310 Steel
Ring Gear Diameter8.875 in (225.4 mm)
Ring And Pinion Ratio5.57:1
Pinion Shaft Diameter1.625 in (41.3 mm)
Installation Kit IncludedNo
Pinion Gear Tooth Quantity7
Axle TypeGM 12 Bolt
Ring Gear Bolts12
Cover Bolts12
Ring Gear Teeth39
Ring Gear Bolt Quantity12
Part FitmentSemi Universal
Vendor Part Number79-0031-1
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
![75W-90 Multi-Purpose Synthetic Gear Oil [1 Quart]](https://www.jegs.com/images/mini_200/500/555/555-28050.jpg)
![Differential Pinion Depth Tool Setup Kit [Hard Anodized Aluminum Components]](https://www.jegs.com/images/mini_200/500/555/555-81655.jpg)
![Black RTV, Temperature Resistant up to 625 Degrees F [3.8 oz. Tube]](https://www.jegs.com/images/mini_200/500/555/555-28035.jpg)
JEGS
Part Number : 555-28035
$799$8.99
You Save$1.00
![1/2 in. Drive Torque Wrench [10 to 150 ft. lbs.]](https://www.jegs.com/images/mini_200/500/555/555-m200db.jpg)
JEGS
Part Number : 555-M200DB
$5239$56.99
You Save$4.60
![Limited Slip Additive [4oz Bottle]](https://www.jegs.com/images/mini_200/500/555/555-60120.jpg)
Some parts are not legal for use in California or other states with similar laws / regulations
