MERCURY COUGAR Differential & Rear-End Components

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: Jan 2, 2026 if ordered today

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Gear, Ring and Pinion, 4.30:1 Ratio, Ford, 8.8 in., Set

Part Number: RMG-6903761

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Pinion Bearing Spacer, Crush Sleeve Eliminator, Steel, Ford 9 in., Each

Part Number: YGA-55041

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

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

Part Number: RMG-F9411

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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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 12, 2026 if ordered today

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

Part Number: MGR-F890370

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Ring and Pinion Installation Kit, Ford, 8 in., Kit

Part Number: RAT-334K

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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USA Standard Master Overhaul kit for the Ford 9" LM102910 differential

Part Number: SPZ-37033

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 5, 2026 if ordered today

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Ring and Pinion Installation Kit, Ford, 9 in., 28-Spline, Open, Kit

Part Number: MGR-F9IKN

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

Pinion Bearing, Rear, 1.312 in. i.d., Chrysler, Dodge, Plymouth, Desoto, Ford, Lincoln, Mercury, Studebaker

Part Number: TMK-HM89443

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

Pinion Bearing, 1.187 in. Inside Diameter, Each

Part Number: TMK-M86649

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

Gear, Ring and Pinion, 4.11:1 Ratio, 1.625 in. Pinion, 8.800 in. Ring Gear, Ford 8.8 in., Set

Part Number: YGA-24097

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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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 19, 2026 if ordered today

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

Part Number: MGR-F888456

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Ring and Pinion Installation Kit, Master Kit, Ford 9 in.; 28 Spline; Incl. Bearing Kit Plus Ring Gear Bolts

Part Number: MGR-R9R28MKT

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Ring and Pinion Gears, Ford 7.5 in., 3.73:1 Ratio, 28-spline, Standard Rotation, Ford 7.5 in., Rear, Ford, Lincoln, Mazda, Mercury, Set

Part Number: SPZ-36114

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Estimated Ship Date: Jan 5, 2026 if ordered today

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Ring and Pinion Installation Kit, Ford, 9 in., 31-Spline Axle, 28-Spline Pinion, Kit

Part Number: RMG-8310071

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Estimated Ship Date: Tomorrow

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

Part Number: RMG-F9389

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Estimated Ship Date: Tomorrow

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Differential, Eaton Detroit Locker, 31-Spline, Ford, 8.8 in., Each

Part Number: ETN-187C145A

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Dec 23, 2025 if ordered today

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USA Standard Gear standard spider gear set for Ford 9", 31 spline, 4-pinion design

Part Number: SPZ-39018

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Differential Pinion Nut, Steel, Each

Part Number: MGR-379570S

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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

Part Number: SUM-730944

3.0 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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Differential, Grip Pro Traction System, 28-Spline, Ford, 9 in., Each

Part Number: PWT-GT109028

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Feb 6, 2026 if ordered today

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• Mfr. Rebate

$40.00 Mail-In Rebate

Price after Manufacturer Rebate: $794.72

Rebate Expires: 12/31/2025

Get $40 back after rebate on this Powertrax Product! Go to https://www.richmondgear.com/rebate.pdf for details. ...Read More

Get UP TO $55 back after rebate on select Powertrax Products! Go to https://www.richmondgear.com/rebate.pdf for details. Valid on purchases made between 11/1/25 and 12/31/25. Claims must be submitted within 30 days of purchase. Allow 6-8 weeks for processing. Valid in USA and Canada. Limit two qualifying purchases per household or address. This offer cannot be combined with other discounts or offers. Rebate intended for end consumer only. Show Less

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Ring and Pinion Gears, 4.88:1 Ratio, Standard Ring Gear Rotation, Ford 8.8 in., Set

Part Number: MGR-F8-8-488

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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

Part Number: MGR-F880411

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 7, 2026 if ordered today

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