MERCURY COUGAR Differential & Rear-End Components Transmission & Drivetrain - Free Shipping on Orders Over $109 at Summit Racing

Eaton Detroit Truetrac 31 Spline Differential Ford 8.8 Inch 913A561

Differential, Eaton Detroit Truetrac, Limited Slip, 31-Spline, Ford, 8.8 in., Each

Part Number: ETN-913A561

4.86 out of 5 stars ( 28 )

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Summit Racing™ Positraction 31 Spline Differential Carriers Ford 8.8 Inch SUM-730944

Differential Carrier, Positraction, Nodular Iron, Ford 8.8 in., 31 Spline, Each

Part Number: SUM-730944

3.0 out of 5 stars ( 4 )

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Eaton Detroit Truetrac 31 Spline Differential Ford 9 Inch 913A586

Differential, Eaton Detroit Truetrac, 31-Spline, Ford 9 in., Each

Part Number: ETN-913A586

4.75 out of 5 stars ( 12 )

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Richmond Gear Pro Gear Ring and Pinion Sets 79-0079-1 Ford 9 in. 4.29 Gears

Gear, Ring and Pinion, 4.29:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0079-1

5.0 out of 5 stars ( 1 )

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Eaton Detroit Truetrac 28 Spline Differential Ford 8 Inch 912A616

Differential, Eaton Detroit Truetrac, Limited Slip, 28-Spline, Ford, 8 in., Each

Part Number: ETN-912A616

5.0 out of 5 stars ( 9 )

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Richmond Gear Pro Gear Ring and Pinion Sets 79-0043-1 Ford 9 in. 3.89 Gears

Gear, Ring and Pinion, 3.89:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0043-1

5.0 out of 5 stars ( 2 )

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Richmond Gear Pro Gear Ring and Pinion Sets 79-0080-1 Ford 9 in. 4.57 Gears

Gear, Ring and Pinion, 4.57:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0080-1

5.0 out of 5 stars ( 1 )

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Yukon Gear & Axle Dura Grip Positraction Carriers Ford 7.5 Inch YDGF7.5-28

Differential Carrier, Dura Grip Positraction, Traction-Lok, 28-spline, Rear, Ford 7.5 in., Ford, Mercury, Each

Part Number: YGA-26034

4.75 out of 5 stars ( 8 )

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Richmond Gear Pro Gear Ring and Pinion Sets 79-0045-1 Ford 9 in. 4.11 Gears

Gear, Ring and Pinion, 4.11:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0045-1

5.0 out of 5 stars ( 3 )

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Eaton Detroit Truetrac 28 Spline Differential Ford 8.8 Inch 912A562

Differential, Eaton Detroit Truetrac, 28-Spline, Ford, 8.8 in., Each

Part Number: ETN-912A562

5.0 out of 5 stars ( 5 )

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Richmond Gear Pro Gear Ring and Pinion Sets 79-0004-1 Ford 9 in. 3.70 Gears

Gear, Pro Ring and Pinion, 3.70:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0004-1

5.0 out of 5 stars ( 3 )

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Yukon Gear & Axle Dura Grip Positraction Carriers Ford 8 Inch YDGF8-28-AG

Dura Grip Positraction Carrier, Traction-Loc, Ford 8 in., 28 Spline,. Aggressive Engagement, Each

Part Number: YGA-26001

Not Yet Reviewed

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Yukon Gear & Axle Dura Grip Positraction Carriers Ford 8 Inch YDGF8-28-SM

Dura Grip Positraction Carrier, Traction-Loc, Ford 8 in., 28 Spline, Smooth Engagement, Each

Part Number: YGA-26002

2.0 out of 5 stars ( 1 )

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Summit Racing™ Ring and Pinion and Differential Pro Packs 14-0063

Combo, Differential, Traction-Lok, Ring and Pinion, 3.55:1 Ratio, Install Kit, Ford, 8.8 in.. 31 Spline, Kit

Part Number: CMB-14-0063

5.0 out of 5 stars ( 3 )

Cannot be shipped Internationally

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Cannot be shipped Internationally

Motive Gear Ring and Pinion Sets F9-300 Ford 9 in. 3.00 Gears

Gear, Ring and Pinion, 3.00:1 Ratio, Ford, 9 in., Set

Part Number: MGR-F9-300

5.0 out of 5 stars ( 4 )

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Richmond Gear Pro Gear Ring and Pinion Sets 79-0003-1 Ford 9 in. 3.60 Gears

Gear, Pro Ring and Pinion, 3.60:1 Ratio, Ford, 9 in., Set

Part Number: RMG-7900031

Not Yet Reviewed

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Motive Gear Ring and Pinion Sets F8.8-456 Ford 8.8 in. 4.56 Gears

Ring and Pinion Gears, 4.56:1 Ratio, Standard Ring Gear Rotation, Ford 8.8 in., Set

Part Number: MGR-F8-8-456

4.64 out of 5 stars ( 11 )

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Richmond Gear Ring and Pinion Sets 49-0100-1 Ford 8 in. 3.00 Gears

Gear, Ring and Pinion, 3.00:1 Ratio, Ford, 8 in., Set

Part Number: RMG-4901001

5.0 out of 5 stars ( 3 )

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Yukon Gear & Axle 31 Spline Differential Carriers Ford 8.8 Inch YC F318

Differential Carrier, Limited Slip, Ford 8.8 in., 31 Spline, Each

Part Number: YGA-20069

Not Yet Reviewed

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Richmond Gear Pro Gear Ring and Pinion Sets 79-0066-1 Ford 9 in. 4.86 Gears

Gear, Ring and Pinion, 4.86:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0066-1

Not Yet Reviewed

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Richmond Gear Pro Gear Ring and Pinion Sets 79-0023-1 Ford 9 in. 6.20 Gears

Gear, Ring and Pinion, 6.20:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0023-1

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

Eaton Detroit Lockers Ford 8 Inch 187S13D

Differential, Eaton Detroit Locker, 28-Spline, Ford, 8 in., Each

Part Number: ETN-187S13D

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

Richmond Gear Ring and Pinion Sets 69-0064-1 Ford 8 in. 4.11 Gears

Gear, Ring and Pinion, 4.11:1 Ratio, Ford, 8 in., Set

Part Number: RMG-6900641

4.0 out of 5 stars ( 3 )

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

Yukon Gear & Axle Ring and Pinion Sets YG F8-355 Ford 8 in. 3.55 Gears

Gear, Ring and Pinion, 3.55:1 Ratio, 1.188 in. Pinion, 25 Spline, 8.000 in. Ring Gear, Ford 8 in., Set

Part Number: YGA-24092

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 8, 2026 if ordered today

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Estimated Ship Date: Jan 8, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Summit Racing™ Ring and Pinion Sets SUM-740801 Ford 8 in. 3.55 Gears

4.25 out of 5 stars ( 15 )

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Motive Gear Performance PRO Gear Ring and Pinion Sets F990370BP Ford 9 in. 3.70 Gears

Ring and Pinion Gears, Pro Series, 3.70:1 Ratio, Ford 9 in., Set

Part Number: MGR-F990370BP

5.0 out of 5 stars ( 1 )

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