1978 PONTIAC FIREBIRD Transmission & Drivetrain

Performance Mini Spool (GM 8.5 - 28 Spline)

Part Number: SDH-10015373

Not Yet Reviewed

Estimated Ship Date: Nov 5, 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: Oct 20, 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: Oct 20, 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: Oct 21, 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: Oct 21, 2025 if ordered today

• Drop Ship
• Special Order

Differential Ring and Pinion Set

Part Number: RNB-697-304

Not Yet Reviewed

Estimated Ship Date: Oct 22, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Automatic Transmission, Circlematic, Forward Shift Pattern, Full Manual Valve Body, Stock Pan, Chevy, THM350, Each

Part Number: TCI-312002

Not Yet Reviewed

Estimated Ship Date: Nov 10, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Clutch Kit, Concept 10.5 Dual-Disc Clutch, 1.125 in. - 10-spline, Metallic Disc, Pressure Plate, Chevy, Small Block, Kit

Part Number: RAM-50-2120N

Not Yet Reviewed

Estimated Ship Date: Oct 15, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Automatic Transmission Kickdown Kit, Vintage Series, GM, TH350, Tan/Black/Red, Kit

Part Number: LOK-VS-23501

Not Yet Reviewed

Estimated Ship Date: Oct 15, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Automatic Transmission Kickdown Cables, Hi-Tech Kickdown Kits, Black Vinyl Jacket, 42.00 in. Cable Length, Fittings, GM, THM350, Kit

Part Number: LOK-XKD-2350TPU

Not Yet Reviewed

Estimated Ship Date: Oct 15, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Combo, ProFit, Close Ratio, T-56 Magnum, 6-Speed, 1975-81 GM F-Body, 2.66:1 First Gear, 0.63:1 Sixth, Kit

Part Number: AWR-COGM-F3G

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Combo, ProFit, Wide Ratio, T-56 Magnum, 6-Speed, 1975-81 GM F-Body, 2.97:1 First Gear, 0.50:1 Sixth, Kit

Part Number: AWR-COGM-F3J

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Shifter, White Lightning, Short Throw, Billet Aluminum, Magnum T-56, Kit

Part Number: AWR-SHWL20100SR4

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Clutch Kit, Concept 10.5 Dual-Disc, 1.125 in. - 10-spline, 10.500 in. Diameter Metallic Disc, for Flat 153-tooth Flywheels, AMC, Chevy, GMC, Kit

Part Number: RAM-50-2122N

Not Yet Reviewed

Estimated Ship Date: Oct 14, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

WASHER, PINION THRUST

Part Number: MGR-559291

Not Yet Reviewed

Estimated Ship Date: Oct 23, 2025 if ordered today

• Drop Ship
• Special Order

Ring and Pinion Installation Kit, Basic, GM 8.5 in., Front/Rear, Kit

Part Number: MGR-R10RT

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Oct 23, 2025 if ordered today

• Drop Ship
• Special Order

CLUTCH KIT

Part Number: SXR-K1877-04

Not Yet Reviewed

Estimated Ship Date: Oct 27, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

CLUTCH PRESSURE PLATE

Part Number: SXR-3082-654-319

Not Yet Reviewed

Estimated Ship Date: Oct 27, 2025 if ordered today

• Drop Ship
• Special Order

Yukon Ring & Pinion sets

Part Number: YGA-24671

Not Yet Reviewed

Estimated Ship Date: Oct 31, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Ring and Pinion Gears and Installation Kit, 8.5" GM 4.56 REAR R&P GEAR/ INSTALL KIT PACKAGE with 28spl POSI & AK 1563 AXLE BRGS (2.25" OD)

Part Number: YGA-12631

Not Yet Reviewed

Estimated Ship Date: Oct 31, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Ring and Pinion Gears and Installation Kit, 8.5" GM 4.56 REAR R&P GEAR/ INSTALL KIT PACKAGE with AK 1563 AXLE BRGS (2.25" OD)

Part Number: YGA-12625

Not Yet Reviewed

Estimated Ship Date: Oct 31, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: YGA-24481

Not Yet Reviewed

Estimated Ship Date: Nov 3, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: YGA-32193

Not Yet Reviewed

Estimated Ship Date: Oct 31, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Posi spring kit for GM 7.5", with preload plates

Part Number: YGA-33206

Not Yet Reviewed

Estimated Ship Date: Oct 31, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: YGA-16116

Not Yet Reviewed

Estimated Ship Date: Oct 31, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order