FORD THUNDERBIRD Differential & Rear-End Components

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

Part Number: RMG-79-0080-1

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

Part Number: RMG-79-0066-1

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

Part Number: RMG-79-0043-1

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

Part Number: ETN-187SL17B

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

Part Number: ETN-912A562

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

Part Number: RMG-79-0004-1

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

Part Number: RMG-79-0060-1

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

Part Number: ETN-19588-010

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

Part Number: YGA-20069

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Gear, Ring and Pinion, 5.14:1 Ratio, Ford, 9 in., Set

Part Number: RMG-79-0017-1

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

Part Number: RMG-79-0054-1

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Differential, No-Slip Traction System, 28-Spline, Ford, 8.8 in., Each

Part Number: PWT-92-0688-2807

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PINION SUPPORT, Yukon heavy-duty pinion support for Ford 9", for upside down applications

Part Number: YGA-32358

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Estimated Ship Date: Feb 20, 2026 if ordered today

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Installation Kit, Master Overhaul, Ford 8 in. IRS, Kit

Part Number: YGA-14153

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Estimated Ship Date: Feb 17, 2026 if ordered today

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Differential Ring And Pinion Set

Part Number: RNB-697-353

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Estimated Ship Date: Feb 11, 2026 if ordered today

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

Part Number: PWT-GT109031

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Estimated Ship Date: Mar 11, 2026 if ordered today

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Axle Differential Case, Ford 9 in., Aluminum, 3.062 in. Bearing Bore, 28, 31, 33 Spline, Each

Part Number: YGA-32034

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Estimated Ship Date: Feb 23, 2026 if ordered today

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