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Shop now. Pay Later. Interest Free.
Make 4 interest-free payments of $188.05 fortnightly and receive your order now. More info
USA Standard Gear ring and pinion sets are designed to exceed OEM specification. All sets receive rigorous in-house quality evaluation to ensure products pass dimensional, material, and fitment testing.
8.5" GM 3.90 R&P (_USE_OEM_4_IMPLA_&_CAPRICE) ** USA STANDARD GEAR **
Differential Ring and Pinion
USA Standard Gear ring and pinion sets are high-quality and precision-machined replacements. They're offered for a wide variety of common and hard-to-find applications, differential case designs, and ratios. The right choice adds confidence to your install; select the USA Standard ring and pinion set recommended for your vehicle.
Brand | USA Standard Gear |
Manufacturer's Part Number | ZG GM8.5-390 |
Part Type | Ring and Pinion Gears |
Product Line | USA Standard Gear Ring and Pinion Sets |
Summit Racing Part Number | SPZ-36215 |
UPC | 883584362159 |
Differential Case Design Type | GM 8.5/8.6 in. |
Ring and Pinion Ratio | 3.90:1 |
Cover Bolts | 10 |
Ring Gear Bolts | 10 |
Pinion Spline Count | 30 |
Ring Gear Rotation | Standard |
Ring Gear Teeth | 39 |
Pinion Gear Teeth | 10 |
Ring Gear Diameter (in.) | 8.500 in. |
Pinion Shaft Diameter (in.) | 1.626 in. |
Installation Kit Included | No |
Cover Gasket Included | No |
Pinion Shims Included | No |
Carrier Shims Included | No |
Crush Sleeve Included | No |
Pinion Seal Included | No |
Pinion Nut Included | No |
Ring Gear Bolts Included | No |
Head Bearing Included | No |
Tail Bearing Included | No |
Carrier Bearings Included | No |
Axle Seals Included | No |
Axle Bearings Included | No |
Differential Cover Included | No |
Differential Oil Included | No |
Friction Modifier Included | No |
Installation DVD Included | No |
Quantity | Sold as a set. |
Notes | Must use 2.73:1 or numerically higher ratio carrier. |
USA Standard Ring & Pinion Gear Set For GM 8.5in in a 3.90 Ratio | ||||
---|---|---|---|---|
Year | Make | Model | Submodel | Region |
1980 | Pontiac | LeMans | Safari | US |
1980 | Chevrolet | K20 Suburban | Silverado | US |
1980 | Buick | Electra | Park Avenue | US |
1980 | GMC | K1500 Suburban | Sierra Classic | US |
1980 | Pontiac | Firebird | Formula | US |
1980 | GMC | K1500 | High Sierra | US |
1980 | GMC | C1500 Suburban | Sierra Classic | US |
1980 | GMC | G2500 | Vandura | US |
1980 | GMC | K2500 | Sierra Classic | US |
1980 | Buick | Regal | Sport | US |
1980 | Chevrolet | C10 Suburban | Silverado | US |
1980 | Chevrolet | Caprice | Classic | US |
1980 | Chevrolet | K10 | Silverado | US |
1980 | GMC | C1500 | Sierra Classic | US |
1980 | Chevrolet | G20 | Chevy Van | US |
1980 | GMC | G1500 | Vandura | US |
1980 | Pontiac | Firebird | Trans Am | US |
1980 | GMC | K2500 Suburban | Sierra Grande | US |
1980 | Pontiac | Bonneville | Base | US |
1980 | Chevrolet | K20 | Custom Deluxe | US |
1980 | Chevrolet | C10 | Custom Deluxe | US |
1980 | Chevrolet | Malibu | Base | US |
1980 | GMC | G1500 | Rally | US |
1980 | Pontiac | Grand Prix | Base | US |
1980 | Chevrolet | Impala | Base | US |
1980 | Chevrolet | K20 | Scottsdale | US |
1980 | Chevrolet | C10 | Scottsdale | US |
1980 | Buick | Regal | Base | US |
1980 | GMC | K1500 Suburban | Sierra Grande | US |
1980 | Chevrolet | K5 Blazer | Cheyenne | US |
1980 | GMC | K2500 | Sierra Grande | US |
1980 | Chevrolet | Malibu | Estate | US |
1980 | GMC | K1500 | Sierra Classic | US |
1980 | GMC | C1500 Suburban | Sierra Grande | US |
1980 | GMC | C1500 | Sierra Grande | US |
1980 | Chevrolet | Malibu | Sport | US |
1980 | Pontiac | Bonneville | Brougham | US |
1980 | Chevrolet | Malibu | Classic | US |
1980 | Chevrolet | G20 | Nomad | US |
1980 | GMC | K2500 Suburban | Base | US |
1980 | Chevrolet | K20 | Silverado | US |
1980 | Chevrolet | G10 | Chevy Van | US |
1980 | Chevrolet | C10 | Silverado | US |
1980 | GMC | C1500 | Street Coupe | US |
1980 | Chevrolet | Malibu | Classic Estate | US |
1980 | Chevrolet | K5 Blazer | Custom Deluxe | US |
1980 | Chevrolet | Malibu | Classic Landau | US |
1980 | GMC | C1500 | Heavy Half | US |
1980 | Chevrolet | K10 Suburban | Custom Deluxe | US |
1980 | Chevrolet | Impala | Sport | US |
Note: Over 50 fitments returned for this product, this table is trimmed to only display the first 50. |
USA Standard Gear ring and pinion sets are designed to exceed OEM specification. All sets receive rigorous in-house quality evaluation to ensure products pass dimensional, material, and fitment testing.
8.5" GM 3.90 R&P (_USE_OEM_4_IMPLA_&_CAPRICE) ** USA STANDARD GEAR **
Differential Ring and Pinion
USA Standard Gear ring and pinion sets are high-quality and precision-machined replacements. They're offered for a wide variety of common and hard-to-find applications, differential case designs, and ratios. The right choice adds confidence to your install; select the USA Standard ring and pinion set recommended for your vehicle.
Brand | USA Standard Gear |
Manufacturer's Part Number | ZG GM8.5-390 |
Part Type | Ring and Pinion Gears |
Product Line | USA Standard Gear Ring and Pinion Sets |
Summit Racing Part Number | SPZ-36215 |
UPC | 883584362159 |
Differential Case Design Type | GM 8.5/8.6 in. |
Ring and Pinion Ratio | 3.90:1 |
Cover Bolts | 10 |
Ring Gear Bolts | 10 |
Pinion Spline Count | 30 |
Ring Gear Rotation | Standard |
Ring Gear Teeth | 39 |
Pinion Gear Teeth | 10 |
Ring Gear Diameter (in.) | 8.500 in. |
Pinion Shaft Diameter (in.) | 1.626 in. |
Installation Kit Included | No |
Cover Gasket Included | No |
Pinion Shims Included | No |
Carrier Shims Included | No |
Crush Sleeve Included | No |
Pinion Seal Included | No |
Pinion Nut Included | No |
Ring Gear Bolts Included | No |
Head Bearing Included | No |
Tail Bearing Included | No |
Carrier Bearings Included | No |
Axle Seals Included | No |
Axle Bearings Included | No |
Differential Cover Included | No |
Differential Oil Included | No |
Friction Modifier Included | No |
Installation DVD Included | No |
Quantity | Sold as a set. |
Notes | Must use 2.73:1 or numerically higher ratio carrier. |
USA Standard Ring & Pinion Gear Set For GM 8.5in in a 3.90 Ratio | ||||
---|---|---|---|---|
Year | Make | Model | Submodel | Region |
1980 | Pontiac | LeMans | Safari | US |
1980 | Chevrolet | K20 Suburban | Silverado | US |
1980 | Buick | Electra | Park Avenue | US |
1980 | GMC | K1500 Suburban | Sierra Classic | US |
1980 | Pontiac | Firebird | Formula | US |
1980 | GMC | K1500 | High Sierra | US |
1980 | GMC | C1500 Suburban | Sierra Classic | US |
1980 | GMC | G2500 | Vandura | US |
1980 | GMC | K2500 | Sierra Classic | US |
1980 | Buick | Regal | Sport | US |
1980 | Chevrolet | C10 Suburban | Silverado | US |
1980 | Chevrolet | Caprice | Classic | US |
1980 | Chevrolet | K10 | Silverado | US |
1980 | GMC | C1500 | Sierra Classic | US |
1980 | Chevrolet | G20 | Chevy Van | US |
1980 | GMC | G1500 | Vandura | US |
1980 | Pontiac | Firebird | Trans Am | US |
1980 | GMC | K2500 Suburban | Sierra Grande | US |
1980 | Pontiac | Bonneville | Base | US |
1980 | Chevrolet | K20 | Custom Deluxe | US |
1980 | Chevrolet | C10 | Custom Deluxe | US |
1980 | Chevrolet | Malibu | Base | US |
1980 | GMC | G1500 | Rally | US |
1980 | Pontiac | Grand Prix | Base | US |
1980 | Chevrolet | Impala | Base | US |
1980 | Chevrolet | K20 | Scottsdale | US |
1980 | Chevrolet | C10 | Scottsdale | US |
1980 | Buick | Regal | Base | US |
1980 | GMC | K1500 Suburban | Sierra Grande | US |
1980 | Chevrolet | K5 Blazer | Cheyenne | US |
1980 | GMC | K2500 | Sierra Grande | US |
1980 | Chevrolet | Malibu | Estate | US |
1980 | GMC | K1500 | Sierra Classic | US |
1980 | GMC | C1500 Suburban | Sierra Grande | US |
1980 | GMC | C1500 | Sierra Grande | US |
1980 | Chevrolet | Malibu | Sport | US |
1980 | Pontiac | Bonneville | Brougham | US |
1980 | Chevrolet | Malibu | Classic | US |
1980 | Chevrolet | G20 | Nomad | US |
1980 | GMC | K2500 Suburban | Base | US |
1980 | Chevrolet | K20 | Silverado | US |
1980 | Chevrolet | G10 | Chevy Van | US |
1980 | Chevrolet | C10 | Silverado | US |
1980 | GMC | C1500 | Street Coupe | US |
1980 | Chevrolet | Malibu | Classic Estate | US |
1980 | Chevrolet | K5 Blazer | Custom Deluxe | US |
1980 | Chevrolet | Malibu | Classic Landau | US |
1980 | GMC | C1500 | Heavy Half | US |
1980 | Chevrolet | K10 Suburban | Custom Deluxe | US |
1980 | Chevrolet | Impala | Sport | US |
Note: Over 50 fitments returned for this product, this table is trimmed to only display the first 50. |