1978 PONTIAC FIREBIRD Transmission & Drivetrain

Gear, Ring and Pinion, 3.73 Ratio, GM, 8.5 in/8.6 in., Set

Part Number: MGR-GM10-373

4.74 out of 5 stars ( 19 )

Estimated Ship Date: Monday 7/28/2025

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Dura Grip Positraction Carrier, Traction-Loc, GM 7.5/7.6 in., 26 Spline, 3.23 Up Ratio, Each

Part Number: YGA-26017

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 7/28/2025

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Automatic Transmission, Remanufactured, Forward Shift Pattern, Automatic/Manual Valve Body, Chevy, TH350, Each

Part Number: TCI-311090

4.06 out of 5 stars ( 16 )

Estimated Ship Date: Monday 7/28/2025

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Differential Carrier, Positraction, Nodular Iron, GM 8.5 in., 28 Spline, 2.73 Up Ratio, Each

Part Number: SUM-730966

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 7/28/2025

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

Part Number: MGR-R10RMK

4.29 out of 5 stars ( 17 )

Estimated Ship Date: Monday 7/28/2025

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Automatic Transmission, Remanufactured, Forward Shift Pattern, Automatic/Manual Valve Body, Chevy, TH350, Each

Part Number: TCI-311005

4.0 out of 5 stars ( 19 )

Estimated Ship Date: Monday 7/28/2025

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Ring and Pinion Gears, 4.11:1 Ratio, 30-spline, Standard Rotation, GM 8.5 in., GM 8.6 in., Set

Part Number: MGR-GM10-411A

4.6 out of 5 stars ( 5 )

Estimated Ship Date: Monday 7/28/2025

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Dura Grip Positraction Carrier, Traction-Loc, GM 7.5/7.6 in., 28 Spline, 3.23 Up Ratio, Each

Part Number: YGA-26018

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Monday 7/28/2025

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Clutch Kit, Super StreetPro, Organic/Ceramic, 1 1/8 in. Diameter Shaft, 10-Spline, 10.5 in. Diameter Disc, Kit

Part Number: MCL-75217

4.4 out of 5 stars ( 25 )

Estimated Ship Date: Monday 7/28/2025

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Shifter Installation Kit, Competition Plus, Borg Warner Super T-10, Code 454, Chevy, Pontiac, Kit

Part Number: HUU-3738609

4.63 out of 5 stars ( 8 )

Estimated Ship Date: Monday 7/28/2025

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Automatic Shifter, Quicksilver, Chevy, Pontiac, Each

Part Number: BMM-80688

4.19 out of 5 stars ( 21 )

Estimated Ship Date: Monday 7/28/2025

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Transmission Dipstick, Braided Stainless Steel Housing, Black Handle, GM, TH350, TH400, Each

Part Number: LOK-XTD3350400FM

4.89 out of 5 stars ( 18 )

Estimated Ship Date: Monday 7/28/2025

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Differential, Eaton Detroit Truetrac, 26-Spline, GM, 7.5 in., 3.23 and Higher, Each

Part Number: ETN-911A319

5.0 out of 5 stars ( 10 )

Estimated Ship Date: Monday 7/28/2025

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• $75.00 Summit Bucks

Gear, Ring and Pinion, 3.73:1 Ratio, 1.625 in. Pinion, 30-Spline, GM 8.5/8.6 in., Set

Part Number: YGA-24158

4.1 out of 5 stars ( 10 )

Estimated Ship Date: Monday 7/28/2025

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Torque Converter, Nitrous Holeshot, 3,200-3,500 rpm Stall, GM, THM350/THM400, Each

Part Number: BMM-20484

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 7/28/2025

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Manual Shifter, Competition, Plus, Borg Warner T-10/Muncie, M-21, Chevy, Pontiac, Each

Part Number: HUU-3918791

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 7/28/2025

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Ring and Pinion Gears and Differential Combo, GM 8.5 in., 3.73:1, 30-spline Pinion, 28-spline Axle, Rear, Buick, Chevy, Oldsmobile, Pontiac, Kit

Part Number: YGA-12628

Not Yet Reviewed

Estimated Ship Date: Monday 7/28/2025

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Transmission Pan, Deep, Aluminum, Natural, GM, TH250, TH350, Each

Part Number: BMM-30280

4.91 out of 5 stars ( 35 )

Estimated Ship Date: Monday 7/28/2025

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Torque Converter, Nitrous Holeshot, 3,500-3,800 rpm Stall Range, 30-spline, THM350/THM400, Each

Part Number: BMM-20485

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 7/28/2025

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Clutch Kit, RXT, 1 1/8 in. x 26-Spline, 9.688 in. Diameter Disc, Chevy, V8, Kit

Part Number: MCL-6921-07

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 7/28/2025

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Gear, Ring and Pinion, 3.73:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, 3 Series, Set

Part Number: RMG-4900411

4.47 out of 5 stars ( 19 )

Estimated Ship Date: Monday 7/28/2025

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Dipstick with Tube, Transmission, Steel, Black, Locking, TH350, TH400, TH200, 200-4R, Each

Part Number: TCI-743860

3.77 out of 5 stars ( 52 )

Estimated Ship Date: Monday 7/28/2025

Axle Bearing, 2.250 in. O.D., 1.400 in. I.D., Each

Part Number: YGA-10004

4.9 out of 5 stars ( 20 )

Estimated Ship Date: Monday 7/28/2025

Differential Cover, Cap Support, Aluminum, Black, Perfect Launch Logo, GM, 8.2 in., 8.5 in., Each

Part Number: PRO-66668

4.29 out of 5 stars ( 48 )

Estimated Ship Date: Monday 7/28/2025

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Shifter Cable, Automatic Transmission, 30 in. Eyelet/Eyelet, Gray, Each

Part Number: SIW-K100-30

4.88 out of 5 stars ( 33 )

Estimated Ship Date: Monday 7/28/2025