MERCURY GRAND MARQUIS Differential & Rear-End Components

Gear, Ring and Pinion, 5.83:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0019-1

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Differential Crush Sleeve; Fits Ford 7.5 in./8.8 in./9 in.

Part Number: RMG-19-0002-1

5.0 out of 5 stars ( 1 )

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Gear, Ring and Pinion, 3.25:1 Ratio, Ford, 9 in., Set

Part Number: MGR-F9-325

3.5 out of 5 stars ( 4 )

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Gear, Ring and Pinion, 4.56:1 Ratio, 1.312 in. Pinion, 28 Spline, 9.000 in. Ring Gear, Ford 9 in., Set

Part Number: YGA-24109

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Replcement Springs, Powertrax No-Slip, Kit

Part Number: PWT-8001001KAV

4.93 out of 5 stars ( 14 )

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Axle bearing retainer for Ford 9", large bearing, 1/2" bolt holes

Part Number: YGA-33467

3.0 out of 5 stars ( 1 )

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Differential Carrier Bearing, Races Included, Koyo Bearing, Steel, Set

Part Number: MGR-706016XR

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Differential Clutch, Steel Pack, Rear, Posi, GM, 8.875 in., Set

Part Number: YGA-16041

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Estimated Ship Date: Dec 26, 2025 if ordered today

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Differential Cover Bolt, Hex-flange Head, Steel, Black, Ford 7.5 in., Ford 8.8 in., Ford 8.8 in. IRS, Ford 9.75 in., Ford 9.75 in. IRS, Each

Part Number: YGA-33554

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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

Part Number: RMG-8310071

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Differential, Grip LS Traction System, 31-Spline, Ford, 9 in., Each

Part Number: PWT-LS109031

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• Mfr. Rebate

$35.00 Mail-In Rebate

Price after Manufacturer Rebate: $701.99

Rebate Expires: 12/31/2025

Get $35 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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Gear, Ring and Pinion, 3.55:1 Ratio, Ford, 8.8 in, Set

Part Number: RMG-4901031

5.0 out of 5 stars ( 1 )

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Bearing, Pinion, 1.850 in. Outside Diameter, Each

Part Number: TMK-R1535TAV

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Gear, Ring and Pinion, 5.43:1 Ratio, Ford, 9 in., Set

Part Number: MGR-F890543

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Ring and Pinion Gears, 3.73:1 Ratio, 30-spline, Standard Ring Gear Rotation, Ford 8.8 in., Set

Part Number: SPZ-36123

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 12, 2025 if ordered today

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Differential, No-Slip Traction System, 28-Spline, Ford, 9 in., Each

Part Number: PWT-92-0690-2800

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Estimated Ship Date: Today

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• Mfr. Rebate

$40.00 Mail-In Rebate

Price after Manufacturer Rebate: $582.99

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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Gear, Ring and Pinion, 3.89:1 Ratio, 1.312 in. Pinion, 28 Spline, 9.000 in. Ring Gear, Ford 9 in., Set

Part Number: YGA-24107

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Estimated Ship Date: Dec 29, 2025 if ordered today

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Differential Cover, 10-bolt, Steel, Natural, Ford 8.8 in., Each

Part Number: YGA-32328

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Gear, Ring and Pinion, 3.55:1 Ratio, 1.625 in. Pinion, 8.800 in. Ring Gear, Ford 8.8 in., Set

Part Number: YGA-24095

5.0 out of 5 stars ( 1 )

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Ring and Pinion Gears, 5.43:1 Ratio, 28 Pinion Spline Count, Ford 9 in., Set

Part Number: MGR-F990543SP

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Estimated Ship Date: Dec 12, 2025 if ordered today

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Gear, Ring and Pinion, 3.90:1 Ratio, Ford 8.8 in., Set

Part Number: SPZ-36124

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 11, 2025 if ordered today

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Spool, Mini, Steel, 31-Spline, 10-Bolt, Ford 9 in., Each

Part Number: MGR-MS9-31

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Today

Gear, Ring and Pinion, 3.55:1 Ratio, Ford, 8.8 in., Set

Part Number: MGR-F88355

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Differential Inner Gear Kit; Ford 9 - 28 Spline, Positraction

Part Number: SVL-2023888

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Estimated Ship Date: Dec 9, 2025 if ordered today

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9"AXLE BRG RETNR, SET20 +lrg&sml SEALED DESIGNS, 3/8"BOLT Hole

Part Number: YGA-33466

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today