FORD THUNDERBIRD Transmission & Drivetrain

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

Part Number: ETN-187SL17B

4.88 out of 5 stars ( 8 )

Estimated Ship Date: Today

• Free Shipping

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 )

Estimated Ship Date: Today

• Free Shipping

Clutch Kit, RST, 1 1/16 in. x 10-Spline, 9.688 in. Diameter Disc, Ford, 351C, 390-428, 429-460, Kit

Part Number: MCL-6911-03

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

• Free Shipping

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

Part Number: YGA-20069

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

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

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: ETN-187C145A

5.0 out of 5 stars ( 6 )

• Free Shipping

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 )

• Free Shipping

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 )

• Free Shipping
• Special Order

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

Part Number: ETN-19588-010

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Free Shipping

Clutch Kit, Concept 10.5 Dual-Disc Clutch, 1.062 in. - 10-spline, Organic Disc, Pressure Plate, Ford, 4.6L, Kit

Part Number: RAM-50-2200

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Grizzly Locker, Ford 9.0 in., 28 Spline, Each

Part Number: YGA-28008

Not Yet Reviewed

Estimated Ship Date: Jan 8, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Clutch Kit, Concept 10.5 Dual-Disc, 1 1/8 in. Input, 26-Spline, Organic, AC, Detomaso, Ford, Lincoln, Mercury, TVR, Sunbeam, Shelby, Omega, Kit

Part Number: RAM-50-2259

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Clutch Kit, Concept 9.5 Dual Disc, Organic Disc, 1 1/8 in.- 26 Spline Disc, Ford, Kit

Part Number: RAM-45-2259

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Differential Carrier, Grizzly Locker, Chromium Alloy Steel, 31-spline, Rear, Ford 8.8 in., Each

Part Number: YGA-28031

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Jan 12, 2026 if ordered today

• Free Shipping
• Special Order

Differential Carrier, Grizzly Locker, Chromium Alloy Steel, 31-spline, Rear, Ford 9 in., Each

Part Number: YGA-28033

Not Yet Reviewed

Estimated Ship Date: Jan 8, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: RMG-79-0021-1

Not Yet Reviewed

• Free Shipping
• Special Order

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

Part Number: PWT-92-0688-2807

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Free Shipping
• Mfr. Rebate

$40.00 Mail-In Rebate

Price after Manufacturer Rebate: $744.99

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

×

Grizzly Locker, Ford 9.0 in., 31 Spline, Each

Part Number: YGA-28009

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

• Free Shipping
• Special Order

Torque Converter, Holeshot, 3,400- 3,800 rpm Stall Range, Ford, C-4, 26 Spline, Each

Part Number: BMM-50454

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Torque Converters, Twister Full Race, 2,800-3,200 rpm Stall Speed Range, 26-spline, 10.00 in. Diameter, Ford C4, Ford, Lincoln, Mercury, Each

Part Number: HAY-97-2E28F

Not Yet Reviewed

Estimated Ship Date: Dec 31, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Clutch Kit, Stage 2 Drag Race, Single, 1.063 in. - 10-spline, Ceramic Disc, Pressure Plate, Ford, 3.8L, Kit

Part Number: SBB-S0609

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: YGA-32358

Not Yet Reviewed

Estimated Ship Date: Jan 8, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: YGA-32034

Not Yet Reviewed

Estimated Ship Date: Jan 8, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: YGA-14153

Not Yet Reviewed

Estimated Ship Date: Jan 8, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Yukon Grizzly locker, Ford 9" with 35 splines, for use with load bolt dropout

Part Number: YGA-28012

Not Yet Reviewed

Estimated Ship Date: Jan 8, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order