1977 PONTIAC FIREBIRD Differential & Rear-End Components

Differential Ring and Pinion Set

Part Number: RNB-697-304

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Estimated Ship Date: Mar 16, 2026 if ordered today

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8.5" GM REAR w/Aftermarket_AG-PRO,_YDG,_XHD-Std,_EATorDET BRG & SEAL KIT, KOYO BRGS

Part Number: SPZ-58050

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Estimated Ship Date: Mar 16, 2026 if ordered today

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Yukon Bearing install kit for '81 and older GM 7.5" differential

Part Number: YGA-11061

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Ring and Pinion Gear Installation Kit, Minimum Install, 27-spline, Standard Rotation, Rear, GM 7.5 in., GM 7.625 in., Kit

Part Number: YGA-12050

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Ring and Pinion Gears, 5.13:1 Ratio, 30-spline, Standard Ring Gear Rotation, GM 8.5/8.6 in., Set

Part Number: YGA-24163

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Ring and Pinion Gears, 3.23:1 Ratio, 27-spline, Standard Rotation, GM 7.5 in., GM 7.6 in., Set

Part Number: YGA-24477

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 30, 2026 if ordered today

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Ring and Pinion Gears and Installation Kit, 8.5" GM 4.11 REAR R&P GEAR/ INSTALL KIT PACKAGE with AK 1563 AXLE BRGS (2.25" OD)

Part Number: YGA-12624

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Differential Ring and Pinion; GM 7.5 - 2.73 Ratio

Part Number: SVL-10004593

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Estimated Ship Date: Mar 12, 2026 if ordered today

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SPRING AND PIN KIT

Part Number: SPZ-17011

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Estimated Ship Date: Mar 13, 2026 if ordered today

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Spider Gears, Side Gears, Cross Shaft Pin, 28 Spline, Open, Rear, GM 7.5 in., GM 7.625 in., Kit

Part Number: SVL-2023876

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Estimated Ship Date: Mar 11, 2026 if ordered today

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Yukon steel spool for GM 8.5" & 8.6" with 30 spline axles

Part Number: YGA-32193

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Posi spring kit for GM 7.5", with preload plates

Part Number: YGA-33206

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Estimated Ship Date: Mar 30, 2026 if ordered today

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Spool, Full Size, Steel, 28-Spline, 10-Bolt, GM 8.5 in., Each

Part Number: RMG-81-1028-1

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 17, 2026 if ordered today

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High performance Yukon Ring & Pinion "thick" gear set for GM 7.5" in a 4.11 ratio

Part Number: YGA-24481

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Estimated Ship Date: Mar 27, 2026 if ordered today

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Spider Gear Kit, Open, 26 Spline, Rear, GM 7.5 in., GM 7.6 in., Kit

Part Number: YGA-16048

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Mar 25, 2026 if ordered today

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Yukon positraction internals for 7.5" and 7.625" GM with 26 spline axles

Part Number: YGA-16116

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Estimated Ship Date: Mar 25, 2026 if ordered today

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Ring and Pinion Installation Kit, Super Kit, GM, 8.5 in., Kit

Part Number: MGR-R10RSK

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 17, 2026 if ordered today

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Mini Spool, MINI SPOOL GM 10 BOLT 8.5"

Part Number: RMG-XL-5140

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Estimated Ship Date: Mar 17, 2026 if ordered today

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Ring and Pinion Gear, 3.90:1 Ratio, GM, 8.5 in./8.6 in., Rear, Set

Part Number: SPZ-36215

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Estimated Ship Date: Mar 12, 2026 if ordered today

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Ring and Pinion Gears and Installation Kit, 8.5" GM 3.90 REAR R&P GEAR/ INSTALL KIT PACKAGE with AK 1563 AXLE BRGS (2.25" OD)

Part Number: YGA-12623

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Estimated Ship Date: Mar 27, 2026 if ordered today

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Gear, Ring and Pinion, 3.42:1 Ratio, 1.438 in. Pinion, 27 Spline, 7.500 in. Ring Gear, Series 2 Carrier, GM 7.5/7.6 in., Set

Part Number: YGA-24479

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 27, 2026 if ordered today

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Ring and Pinion Kit

Part Number: RMG-GM75323

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Estimated Ship Date: Mar 16, 2026 if ordered today

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Gear, Ring and Pinion, 2.73:1, GM, 8.5 in., 8.6 in., Set

Part Number: SPZ-36346

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Estimated Ship Date: Mar 16, 2026 if ordered today

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USA Standard Gear standard spider gear set for GM 8.5", 30 spline

Part Number: SPZ-39027

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Estimated Ship Date: Mar 16, 2026 if ordered today

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Performance Mini Spool (GM 7.5 - 26 Spine)

Part Number: SDH-10015364

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Estimated Ship Date: Apr 2, 2026 if ordered today

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