1978 PONTIAC FIREBIRD Differential & Rear-End Components

Axle Assembly, Standard OE Width, Ford 9 in., Black, 1541H Steel, 31 Spline Axles, F-Body, Second Gen, for use with QA1 4-Link, Chevy, Pontiac, Kit

Part Number: QA1-R902S

Not Yet Reviewed

Estimated Ship Date: Nov 17, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Yukon Dura Grip case, GM 8.5" & 8.6", 2.73 & up

Part Number: YGA-20107

Not Yet Reviewed

Estimated Ship Date: Nov 19, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Yukon 1541H alloy rear axle for 8.2" and 8.5" GM passenger

Part Number: YGA-21243

Not Yet Reviewed

Estimated Ship Date: Nov 19, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Differential Carrier Gear Kit

Part Number: RMG-XL-4048

Not Yet Reviewed

Estimated Ship Date: Nov 10, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Pinion Shaft, SHAFT,GM 10-BOLT,7.5,RDF,NOSLP

Part Number: RMG-XL-5630

Not Yet Reviewed

Estimated Ship Date: Nov 10, 2025 if ordered today

• Drop Ship
• Special Order

Ring and Pinion Kit

Part Number: RMG-XL-1016-1

Not Yet Reviewed

Estimated Ship Date: Nov 10, 2025 if ordered today

• Drop Ship
• Special Order

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

Not Yet Reviewed

Estimated Ship Date: Nov 19, 2025 if ordered today

• Drop Ship
• Special Order

Ring and Pinion Gears and Installation Kit, 8.5" GM 3.42 REAR R&P GEAR/ INSTALL KIT PACKAGE with AK 1563 AXLE BRGS (2.25" OD)

Part Number: YGA-12621

Not Yet Reviewed

Estimated Ship Date: Nov 19, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Ring and Pinion Gears and Installation Kit, 8.5" GM 3.90 REAR R&P GEAR/ INSTALL KIT PACKAGE with 28spl POSI & AK 1563 AXLE BRGS (2.25" OD)

Part Number: YGA-12629

Not Yet Reviewed

Estimated Ship Date: Nov 19, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Yukon Ring & Pinion sets

Part Number: YGA-24671

Not Yet Reviewed

Estimated Ship Date: Nov 19, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

SPRING AND PIN KIT

Part Number: SPZ-17011

Not Yet Reviewed

Estimated Ship Date: Nov 4, 2025 if ordered today

• Drop Ship
• Special Order

Axle 8.2" & 8.5" GM REAR, '68-'81 PASSSHAFT, 30-1/8", 2.780" SMALL HUB, 28spl, 1 SIDE

Part Number: SPZ-11951

Not Yet Reviewed

Estimated Ship Date: Nov 4, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: SPZ-58050

Not Yet Reviewed

Estimated Ship Date: Nov 4, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

8.5" GM PINION KIT, KOYO BRGS

Part Number: SPZ-60012

Not Yet Reviewed

Estimated Ship Date: Nov 4, 2025 if ordered today

• Drop Ship
• Special Order

Differential, Grip Pro Traction System, 28-Spline, GM 8.5 in., Each

Part Number: PWT-GT201028

Not Yet Reviewed

Estimated Ship Date: Nov 11, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: SPZ-36346

Not Yet Reviewed

Estimated Ship Date: Nov 4, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Ring and Pinion Gears and Installation Kit, 8.5" GM 3.08 REAR R&P GEAR/ INSTALL KIT PACKAGE with AK 1563 AXLE BRGS (2.25" OD)

Part Number: YGA-12620

Not Yet Reviewed

Estimated Ship Date: Nov 19, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Not Yet Reviewed

Estimated Ship Date: Nov 19, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

8.5" GM 28spl MINI SPOOL

Part Number: SPZ-59011

Not Yet Reviewed

Estimated Ship Date: Nov 4, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Differential Ring and Pinion; GM 7.5 - 2.73 Ratio

Part Number: SVL-10004593

Not Yet Reviewed

Estimated Ship Date: Nov 3, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: SVL-2023876

Not Yet Reviewed

Estimated Ship Date: Nov 3, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Crosspin, Replacement, Steel, Spartan, GM 8.5 in., Each

Part Number: SPZ-17024

Not Yet Reviewed

Estimated Ship Date: Nov 4, 2025 if ordered today

• Drop Ship
• Special Order

Differential Carrier, Spartan Locker, Steel, 30-spline, Rear, GM 8.5 in., Each

Part Number: SPZ-17041

Not Yet Reviewed

Estimated Ship Date: Nov 4, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Differential Cover, 10-bolt, Steel, Natural, GM 7.5 in., GM 7.625 in., Each

Part Number: YGA-32331

Not Yet Reviewed

Estimated Ship Date: Nov 19, 2025 if ordered today

• Drop Ship
• Special Order

Cross Shaft, Differential, Steel, GM 8.5 in., with Mini-Spool, Each

Part Number: YGA-32238

Not Yet Reviewed

Estimated Ship Date: Nov 18, 2025 if ordered today

• Drop Ship
• Special Order