1978 PONTIAC FIREBIRD Transmission & Drivetrain

Ring and Pinion-GM 8.5/8.625

Part Number: MGR-GM10-373A

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Estimated Ship Date: Nov 5, 2025 if ordered today

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Ring and Pinion

Part Number: MGR-GM75-323

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Ring and Pinion Gears, 2.73:1 Ratio, 27-spline, Standard Rotation, GM 7.5 in., GM 7.625 in., Set

Part Number: YGA-24475

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Estimated Ship Date: Nov 14, 2025 if ordered today

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Carrier Shims, Super, Steel, Set of 18

Part Number: YGA-16042

3.11 out of 5 stars ( 9 )

Estimated Ship Date: Today

Clutch Kits, Street 450 Clutch Conversion Kits, 1.125 in. - 10-spline, Single Organic Disc, 11.000 in. Diameter, Buick, Chevy, Olds, Pontiac, Kit

Part Number: HAY-91-1004

2.33 out of 5 stars ( 3 )

Estimated Ship Date: Nov 4, 2025 if ordered today

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Clutch Kit, Street 650 Clutch Conversion, Performance, Single Disc, 1.125 in. - 10-spline, 11.000 in. Sintered Metallic Disc Diameter, Chevy, Jeep

Part Number: HAY-92-1004

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Estimated Ship Date: Nov 4, 2025 if ordered today

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Wheel Bearings, GM Genuine Parts, 1.250 in. Bore Diameter, Steel, 2.328 in. O.D., 0.625 in. Width, BMW, Buick, Chevy, Chrysler, Dodge, Ford, GMC, Each

Part Number: ADO-A6

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Automatic Transmission Kickdown Cable, Carburetor, Buick, Chevrolet, GMC, Oldsmobile, Pontiac, TH350, Each

Part Number: OER-153666

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Replcement Springs, Powertrax No-Slip, Kit

Part Number: PWT-8001001KAV

4.93 out of 5 stars ( 14 )

Estimated Ship Date: Today

Gear, Ring and Pinion, 3.08:1 Ratio, GM, 8.5/8.6 in., Set

Part Number: MGR-G885308

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Nov 4, 2025 if ordered today

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

Part Number: MGR-G885273

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Neutral Safety Back Up Switch, Plastic, Automatic Transmission, Chevy, GMC. Oldsmobile, Pontiac, GM#1994163 , Each

Part Number: SUM-RP21426

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Pinion depth shim kit for Toyota8", GM 7.5", 8.2" & 12 bolt truck

Part Number: YGA-55064

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Flexplate, 153 Tooth, Internal Balance, 2-Piece Rear Main Seal, Steel, Chevy, Each

Part Number: QTI-RM-920

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Estimated Ship Date: Oct 31, 2025 if ordered today

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Ring and Pinion Installation Kit, Super Kit, GM, 7.5 in., Kit

Part Number: MGR-GM7-5IK

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Clutch Kit, Concept 10.5 Dual-Disc Clutch, 1 1/8 in. Input, 10-Spline, Organic, AMC, Chevy, GMC, Oldsmobile, Pontiac, Kit

Part Number: RAM-50-2122

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Estimated Ship Date: Oct 29, 2025 if ordered today

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Ring and Pinion Gears, 3.23:1 Ratio, 27-spline, Standard Ring Gear Rotation, GM 7.5 in., GM 7.625 in., Set

Part Number: SPZ-36194

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Estimated Ship Date: Oct 31, 2025 if ordered today

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System High Flow Filter GM TH350

Part Number: TCI-328505

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Estimated Ship Date: Nov 24, 2025 if ordered today

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Differential Shims, Pinion, Steel, Kit

Part Number: MGR-1104

3.83 out of 5 stars ( 6 )

Estimated Ship Date: Today

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, GM, F-Body, 1975-81, Kit

Part Number: AWR-COGM-F3FX

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Estimated Ship Date: Dec 12, 2025 if ordered today

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1965-83 Buick, Chevy, Pontiac, Olds; Clutch Fork Ball Stud; Each

Part Number: OER-3729000

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Transmission Bushing, Actual OD - 2.0035; Length - 0.605; Max Wall - 0.0622

Part Number: DUR-44034TG

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Gear, Ring and Pinion, 4.56:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, Set

Part Number: MGR-GM10-456

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Pinion Crush Sleeves, Steel, GM, 8.5 in., 8.6 in., 8.75 in., Pair

Part Number: RNB-81057

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

Clutch Pilot Bushing .593 In. x 1.09 In. Type A, Length .750 In., Set of 5

Part Number: RNB-690-014

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Today