MERCURY COUGAR Differential & Rear-End Components

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

Part Number: ETN-912A616

5.0 out of 5 stars ( 9 )

Estimated Ship Date: Today

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

Part Number: ETN-187SL17B

4.88 out of 5 stars ( 8 )

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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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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 )

Estimated Ship Date: Today

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

Part Number: YGA-20069

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Differential, Posi Performance, Limited Slip, 31-Spline, Ford, 8.8 in., Each

Part Number: ETN-19588-010

5.0 out of 5 stars ( 1 )

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

Part Number: RMG-7900031

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

Part Number: RMG-79-0023-1

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Estimated Ship Date: Jan 5, 2026 if ordered today

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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, 5.67:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0007-1

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Estimated Ship Date: Jun 11, 2026 if ordered today

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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 4, 2026 if ordered today

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• Mfr. Rebate

$40.00 Mail-In Rebate

Price after Manufacturer Rebate: $884.99

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, 5.14:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0017-1

5.0 out of 5 stars ( 3 )

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

Part Number: RMG-79-0060-1

5.0 out of 5 stars ( 1 )

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Ring and Pinion Gears and Installation Kit, 8.0" FORD 3.25 REAR R&P GEAR/ INSTALL KIT PACKAGE; FITS STD OPEN CARRIER w/ 1.625" BEARING JOURNAL

Part Number: YGA-12511

Not Yet Reviewed

Estimated Ship Date: Jan 16, 2026 if ordered today

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Ring and Pinion Gears and Installation Kit, 8.0" FORD 3.00 REAR R&P GEAR/ INSTALL KIT PACKAGE; FITS STD OPEN CARRIER w/ 1.625" BEARING JOURNAL

Part Number: YGA-12510

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Estimated Ship Date: Jan 13, 2026 if ordered today

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Differential Carrier, Grizzly Locker, Chromium Alloy Steel, 28-spline, Rear, Ford 8 in., Each

Part Number: YGA-28006

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Estimated Ship Date: Jan 13, 2026 if ordered today

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Gear, Ring and Pinion, 6.50:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0054-1

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Gear, Ring and Pinion, 5.00:1 Ratio, Ford, 9 in., Set

Part Number: RMG-7900781

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Estimated Ship Date: Jan 6, 2026 if ordered today

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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, Grip LS Traction System, 28-Spline, Ford, 8 in., Each

Part Number: PWT-LS108028

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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• Mfr. Rebate

$35.00 Mail-In Rebate

Price after Manufacturer Rebate: $771.99

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, 5.43:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0005-1

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Estimated Ship Date: Jan 6, 2026 if ordered today

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Gear, Ring and Pinion, 6.00:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0021-1

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